[Ichthyology • 2017] A Revision of the Cis-Andean Species of the Genus Brycon Müller & Troschel (Characiformes: Characidae) ---ScRaBBlE

Brycon hilarii (Valenciennes, 1850)

DOI:  10.11646/zootaxa.4222.1.1

 Abstract 

A revision of the cis-andean species of Brycon, with the exception of the Brycon pesu species-complex, is presented. Twenty-one Brycon species (including B. pesu) are recognized from cis-andean river systems: Brycon stolzmanni Steindachner, from the upper Río Marañon basin, Peru; Brycon coxeyi Fowler, from the Río Marañon basin, Ecuador and Peru; Brycon polylepis Moscó Morales, from the Lago de Maracaibo, Río Orinoco, upper rio Amazonas, and rio Tocantins basins, Venezuela, Colombia, Peru, and Brazil; Brycon coquenani Steindachner, from the upper Río Caroni, Río Orinoco basin, Venezuela; Brycon insignis Steindachner, from the rio Paraíba do Sul and small adjacent coastal river basins of eastern Brazil; Brycon vermelha Lima & Castro, endemic from the rio Mucuri basin, eastern Brazil; Brycon howesi new species, endemic from the rio Jequitinhonha basin, Brazil; Brycon dulcis new species, endemic from the rio Doce basin, eastern Brazil; Brycon ferox Steindachner, from several small coastal river systems, including the rio Mucuri basin in eastern Brazil; Brycon vonoi new species, from the rio Pardo basin and apparently also from a adjacent river system, the rio Una, in eastern Brazil; Brycon opalinus (Cuvier), from the headwaters of the rio Paraíba do Sul and rio Doce basins, eastern Brazil; Brycon nattereri Günther, from the headwaters of the upper rio Paraná, rio São Francisco, and upper rio Tocantins basins, Brazil; Brycon orthotaenia Günther, endemic from the rio São Francisco basin, Brazil; Brycon orbignyanus (Valenciennes), from the rio Paraná and rio Uruguai basins, Brazil, Paraguay, Argentina, and Uruguay; Brycon hilarii (Valenciennes), from the rio Paraguai, middle rio Paraná, and upper rio Amazonas basins, Brazil, Paraguay, Argentina, Peru, and Ecuador; Brycon whitei Myers & Weitzman, from the Río Orinoco basin in Colombia and Venezuela; Brycon amazonicus (Agassiz), from the Rio Amazonas and Río Orinoco basins, Brazil, Peru, Colombia, Bolivia, Venezuela, and Guyana; Brycon gouldingi Lima, endemic from the rio Tocantins basin, Brazil; Brycon melanopterus (Cope), from the western and central rio Amazonas basin, Brazil, Peru, Ecuador, and Colombia; and Brycon falcatus Müller & Troschel, widespread in the the rio Amazonas and Río Orinoco basins, and several guyanese river systems, in Brazil, Venezuela, Colombia, Peru, Bolivia, Guyana, Suriname, and French Guiana. All species are redescribed and illustrated, and a key to the species is provided. Comments on the diagnosis of the genus Brycon, the biogeography of the cis-andean species, and their current conservation status, are presented.

Keywords: Pisces, taxonomy, conservation, biogeography, mimicry, Amazon basin, Orinoco basin, eastern Brazil

Flávio C. T. Lima. 2017. A Revision of the Cis-Andean Species of the Genus Brycon Müller & Troschel (Characiformes: Characidae).
Zootaxa. 4222(1); 1-189. DOI:  10.11646/zootaxa.4222.1.1

21 Brycon species (including B. pesu) are recognized from Cis-Andean River Systems: 

• Brycon stolzmanni Steindachner, from the upper Río Marañon basin, Peru

• Brycon coxeyi Fowler, from the Río Marañon basin, Ecuador and Peru

• Brycon polylepis Moscó Morales, from the Lago de Maracaibo, Río Orinoco, upper rio Amazonas, and rio Tocantins basins, Venezuela, Colombia, Peru, and Brazil

• Brycon coquenani Steindachner, from the upper Río Caroni, Río Orinoco basin, Venezuela

• Brycon insignis Steindachner, from the rio Paraíba do Sul and small adjacent coastal river basins of eastern Brazil

• Brycon vermelha Lima & Castro, endemic from the rio Mucuri basin, eastern Brazil

• Brycon howesi new species, endemic from the rio Jequitinhonha basin, Brazil

• Brycon dulcis new species, endemic from the rio Doce basin, eastern Brazil

• Brycon ferox Steindachner, from several small coastal river systems, including the rio Mucuri basin in eastern Brazil

• Brycon vonoi new species, from the rio Pardo basin and apparently also from a adjacent river system, the rio Una, in eastern Brazil

• Brycon opalinus (Cuvier), from the headwaters of the rio Paraíba do Sul and rio Doce basins, eastern Brazil

• Brycon nattereri Günther, from the headwaters of the upper rio Paraná, rio São Francisco, and upper rio Tocantins basins, Brazil

• Brycon orthotaenia Günther, endemic from the rio São Francisco basin, Brazil

• Brycon orbignyanus (Valenciennes), from the rio Paraná and rio Uruguai basins, Brazil, Paraguay, Argentina, and Uruguay

• Brycon hilarii (Valenciennes), from the rio Paraguai, middle rio Paraná, and upper rio Amazonas basins, Brazil, Paraguay, Argentina, Peru, and Ecuador

• Brycon whitei Myers & Weitzman, from the Río Orinoco basin in Colombia and Venezuela

• Brycon amazonicus (Agassiz), from the Rio Amazonas and Río Orinoco basins, Brazil, Peru, Colombia, Bolivia, Venezuela, and Guyana

• Brycon gouldingi Lima, endemic from the rio Tocantins basin, Brazil

• Brycon melanopterus (Cope), from the western and central rio Amazonas basin, Brazil, Peru, Ecuador, and Colombia

• Brycon falcatus Müller & Troschel, widespread in the the rio Amazonas and Río Orinoco basins, and several guyanese river systems, in Brazil, Venezuela, Colombia, Peru, Bolivia, Guyana, Suriname, and French Guiana

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Tarumania walkerae • Tarumaniidae fam. nov., A New Family of Neotropical Freshwater Fishes from Deep Fossorial Amazonian Habitat, with A Reappraisal of Morphological Characiform Phylogeny (Teleostei: Ostariophysi) ---ScRaBBlE

Tarumania walkerae

de Pinna, Zuanon, Py-Daniel & Petry, 2017

 DOI: 10.1093/zoolinnean/zlx028  

Abstract

We present the taxonomic description of Tarumaniidae, a new family of South American freshwater fishes including a new genus (Tarumania) and species (Tarumania walkerae) from the Central Amazon. The new taxon displays an extraordinary set of unique characteristics, which sets it apart from all other known bony fishes, either in South America or elsewhere. Tarumaniidae has reverse-imbricated scales on the head, 244 or more scales along the midlateral lateral series, an 11-chambered swimbladder extending along most of the body, an anteriorly deflectable pelvic fin and a platybasic skull, among other unusual traits. Although the general habitus of Tarumania gives little hint of its phylogenetic placement, examination of internal anatomy is largely elucidative concerning the main features of its relationships. For example, Tarumania has a complete Weberian apparatus, comprising a set of characteristics supporting its position in Otophysi and Ostariophysi. Additional comparative evidence corroborates its placement in the order Characiformes, including some trademark characiform synapomorphies such as the presence of a hypertrophied lagenar capsule. We conducted a phylogenetic analysis on the basis of previously published morphological evidence for Characiformes, with the inclusion of Tarumania and additional relevant taxa and characters. Results support the position of Tarumania as a part of the superfamily Erythrinoidea and sister group to the neotropical Erythrinidae. Our increased taxonomic representation of Erythrinidae in the matrices firmly corroborates Tarumania as sister group to the whole of Erythrinidae and not to a subgroup of that family. Tarumania walkerae is a predator, which inhabits vast leaf-litter deposits in the Rio Negro drainage, and is found deeply buried in isolated pools during the dry season. It is the first characiform with an anguilliform body shape and fossorial habits. The unprecedented combination of phenotypic traits, behaviour and habitat adds substantially to the larger picture of freshwater fish diversity. Although its microhabitat is difficult to sample, the geographical range of T. walkerae includes areas close to major urban centres and which have been ichthyologically surveyed for many years. The fact that a relatively large and highly distinctive fish such as Tarumania remained undiscovered until now is testimony to the still-incomplete state of knowledge of biodiversity in Amazonian waters.

Keywords: Amazon, Characiformes, Erythrinoidea, new genus, new species, phylogeny, systematics, taxonomy

Figure 1. Tarumania walkerae gen. et sp. nov., holotype, INPA 33737. 

Figure 2. Tarumania walkerae gen. et sp. nov., holotype, INPA 33737. 
Figure 3. Live specimen, juvenile, of Tarumania walkerae, paratype, MZUSP 120543, shortly after collection. Arrow shows pelvic fins in anteriorly deflected position. 

TAXONOMIC ACCOUNTS

Tarumaniidae fam. nov.

Tarumania gen. nov. 
Type species: Tarumania walkerae sp. nov. 

Etymology: From the river Tarumã-Mirim, tributary of the lower Rio Negro, first known locality of the new taxon. A noun in nominative singular. Gender feminine.

Tarumania walkerae sp. nov.

Etymology: The specific name honours eminent limnologist Ilse Walker [Instituto Nacional de Pesquisas da Amazônia, Manaus (INPA)], not only for her lifelong contribution to the knowledge of Amazonian ecology but also for having collected the first (and for some years, only) known specimen. The epithet is a noun in the genitive feminine case.

Geographical distribution: So far endemic to the Rio Negro basin, from the Rio Tarumã-Mirim, tributary to the Rio Negro near the city of Manaus, and from the Anavilhanas archipelago, on the main Rio Negro (Fig. 11). The two localities are ~60 km apart in straight line.

Ecological notes All specimens known of Tarumania walkerae were collected deeply buried into massive leaf-litter deposits in isolated pools in the riparian forest. ....

Figure 2. Tarumania walkerae gen. et sp. nov., holotype, INPA 33737. Dorsal (a) and ventral (b) views of head.
Figure 5. Tarumania walkerae, paratype, INPA 21603, lateral view of head showing reverse-imbricated scales. Specimen cleaned of superficial mucus.

Mário de Pinna, Jansen Zuanon, Lucia Rapp Py-Daniel and Paulo Petry. 2017. A New Family of Neotropical Freshwater Fishes from Deep Fossorial Amazonian Habitat, with A Reappraisal of Morphological Characiform Phylogeny (Teleostei: Ostariophysi). Zoological Journal of the Linnean Society. DOI:   10.1093/zoolinnean/zlx028 

facebook.com/SouthAmericanIchthyology/photos/1620698521284272
Paulo and the Mysterious Muck Fish youtu.be/FIzUGi7k9M0 

  

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Tometes siderocarajensis • A New Species of Tometes Valenciennes 1850 (Characiformes: Serrasalmidae) from Tocantins-Araguaia River Basin Based on Integrative Analysis of Molecular and Morphological Data ---ScRaBBlE

Tometes siderocarajensis 

Andrade, Machado, Jégu, Farias & Giarrizzo, 2017  

DOI: 10.1371/journal.pone.0170053 

Abstract

A new large serrasalmid species of Tometes is described from the Tocantins-Araguaia River Basin. Tometes siderocarajensis sp. nov. is currently found in the rapids of the Itacaiúnas River Basin, and formerly inhabited the lower Tocantins River. The new species can be distinguished from all congeners, except from T. ancylorhynchus, by the presence of lateral space between 1st and 2nd premaxillary teeth, and by the absence of lateral cusps in these two teeth. However, T. siderocarajensis sp. nov. can be differentiated from syntopic congener T. ancylorhynchus by an entirely black with mottled red body in live specimens, densely pigmented pelvic fins with a high concentration of dark chromatophores, and the presence of 39 to 41 rows of circumpeduncular scales (vs. silvery body coloration with slightly reddish overtones on middle flank during breeding period in live specimens, hyaline to slightly pale coloration on distalmost region of pelvic fins, and 30 to 36 rows of circumpeduncular scales). Additionally, molecular sequence shows that T. siderocarajensis sp. nov. is reciprocally monophyletic, and diagnosable from all congeners by having two autapomorphic molecular characters in the mitochondrial gene COI. The phylogenetic reconstruction still show that T. siderocarajensis sp. nov. is closely related to T. trilobatus. This is the first molecular study using an integrative taxonomic approach based on morphological and molecular sequence data for all described species of Tometes. These findings increase the number of formally described species of Tometes to seven. A key to the Tometes species is provided.

 

Fig 1. Tometes siderocarajensis sp. nov. from Tocantins-Araguaia River Basin,
(a) MPEG 33922, holotype photographed alive, male, 338.0 mm SL;
(b) MZUSP 117052, paratype, preserved specimen, male, 341.3 mm SL.

Fig 4. Tometes siderocarajensis, paratypes, (a) INPA 52811, female, 227.3 mm SL,
 (b) ZUEC 12598, female, 328.0 mm SL. Preserved specimens.

Diagnosis: Tometes siderocarajensis sp. nov. is distinguished from all congeners by dense pigmentation on the distalmost portion of the pelvic-fin rays or the entirety of the fin (Fig 2A, Fig 2B) [vs. pelvic fin hyaline or pale, or with few scattered dark chromatophores along distal portion of rays (Fig 2C, Fig 2E)]. Additionally, it is distinguished from all, except from T. camunani and T. kranponhah, by having more circumpeduncular scale rows (39‒41 vs. 38 or less), and from T. kranponhah and T. trilobatus by having 1st and 2nd labial premaxillary teeth laterally spaced (Fig 3A) (vs. 1st and 2nd labial premaxillary teeth with lateral contact). The new species is further distinguished from T. trilobatus by having more perforated lateral line scales (74–84 vs. 58–72) and from T. makue by having more spines on ventral keel (11–17 prepelvic spines and 26–33 total spines vs. 0–9 and 10–23, respectively). Finally, Tometes siderocarajensis sp. nov. can be distinguished from T. lebaili by having a terminal to gently upturned mouth and invariably 5 dentary teeth (vs. a markedly upturned mouth and 6–7 dentary teeth).

Fig 7. Itacaiúnas River, Pará State, at Mosaic of Conservation Units of Serra dos Carajás, type locality of Tometes siderocarajensis. 

Etymology: The epithet siderocarajensis alludes to the locality ‘Serra and Carajás’, which is the largest high-grade iron deposit in the world. From the Greek‒Latin sidero means ‘iron’, and carajensis in allusion to the type locality. A toponymic adjective.

Geographic distribution: Tometes siderocarajensis is known to occur in the rapids of the Itacaiúnas River (Fig 7) and in its right-bank tributary, the Cateté River (average elevation of localities around 220 m a.s.l.), both located in the Mosaic of Conservation Units of Serra dos Carajás, Tocantins-Araguaia River Basin, State of Pará (Fig 8). In addition, T. siderocarajensis had its record confirmed in the Tocantins River based on specimens collected before the construction of the Tucuruí Hydroelectric Reservoir (INPA 52481), an area formerly known to contain many rapids but is currently flooded by the dam.

Marcelo C. Andrade, Valéria N. Machado, Michel Jégu, Izeni P. Farias and Tommaso Giarrizzo. 2017. A New Species of Tometes Valenciennes 1850 (Characiformes: Serrasalmidae) from Tocantins-Araguaia River Basin Based on Integrative Analysis of Molecular and Morphological Data. PLoS ONE. 12(4): e0170053. DOI: 10.1371/journal.pone.0170053

   

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Hyphessobrycon klausanni • A New Species of Hyphessobrycon (Characiformes, Characidae) from the upper Guaviare River, Orinoco River Basin, Colombia ---ScRaBBlE

Hyphessobrycon klausanni 

García-Alzate, Urbano-Bonilla & Taphorn, 2017 

DOI:  10.3897/zookeys.668.11489 

Abstract

Hyphessobrycon klausanni sp. n. is described from small drainages of the upper Guaviare River (Orinoco River Basin) in Colombia. It differs from all congeners by having a wide, conspicuous, dark lateral stripe extending from the anterior margin of the eye across the body and continued through the middle caudal-fin rays, and that covers (vertically) three or four horizontal scale rows. It also differs by having an orange-yellow stripe extending from the anterosuperior margin of the eye to the caudal peduncle above the lateral line in life. It differs from all other species of Hyphessobrycon that have a similar dark lateral stripe: H. cyanotaenia, H. loretoensis, H. melanostichos, H. nigricinctus, H. herbertaxelrodi, H. eschwartzae, H. montogoi, H. psittacus, H. metae, H. margitae, H. vanzolinii, and H. peruvianus in having only three or four pored scales in the lateral line, 21 to 24 lateral scales and six teeth in the inner premaxillary row. Hyphessobrycon klausanni differs from H. loretoensis in having seven to eight maxillary teeth (vs. three to four) and in having a longer caudal peduncle (12.4–17.0% SL vs. 4.6–8.0% SL). Additionally Hyphessobrycon klausanni can be distinguished from the other species of Hyphessobrycon with a dark lateral stripe from the Orinoco River Basin (H. metae and H. acaciae) in having two teeth in the outer premaxillary row (vs. three to four) and 10 branched pectoral–fin rays (vs. 11 to 12). It further differs from H. metae by the length of the snout (17.6–22.8% HL vs. 9.9–15.2% HL) and by the length of the caudal peduncle (12.4–17.0% SL vs. 7.3–11.8% SL).

Keywords: New taxon, Neotropical Ichthyology, Guaviare River, diversity

Figure 3. Live colours of Hyphessobrycon klausanni sp. n. Paratype, UARC–IC 540, 22.4 mm SL. 

Etymology: Research leading to the discovery and recognition of this species was partially funded by Mr. Klaus-Peter Lang from Oberhausen, Germany. To commemorate the 80th birthday of his mother, this species is dedicated to and named for his father “Klaus” and his mother “Anni”.

Ecological note: Hyphessobrycon klausanni lives in shallow (0.30–1.5 m) well-oxygenated (6.39–7.68 mg/l) streams with transparent waters flowing (0.063 m/s) over different types of substrates (rocks, sand, gravel and decomposing organic material). The temperature range was narrow, 25.5–26°C but pH varied from moderately acidic to basic (6.47–8.7). Hyphessobrycon klausanni was found near shore among aquatic vegetation, tree roots and fallen logs. Other species found at the sites included: Hemigrammus barrigonae, Ctenobrycon spilurus, Tyttocharax metae, Moenkhausia oligolepis, M. chrysargyrea, M. lepidura, Chrysobrycon guahibo, Ochmacanthus orinoco, Farlowella vittata, Ancistrus triradiatus, Centromochlus reticulatus and Anablepsoides sp. Stomach content analysis (n = 4) revealed a diet of aquatic and terrestrial invertebrates: Coleoptera (Dytiscidae), Ephemeroptera, Hymenoptera (Formicidae), larvae of Chironomidae and others not identified due to the degree of fragmentation.

Carlos A. García-Alzate, Alexander Urbano-Bonilla and Donald C. Taphorn. 2017. A New Species of Hyphessobrycon (Characiformes, Characidae) from the upper Guaviare River, Orinoco River Basin, Colombia. ZooKeys. 668; 123-138. DOI:  10.3897/zookeys.668.11489

Resumen: Hyphessobrycon klausanni sp. n. es descrita de pequeños drenajes del alto río Guaviare (cuenca del río Orinoco) en Colombia. Se diferencia de todos los congéneres por tener una amplia franja lateral oscura lateral que se extiende desde el margen anterior del ojo a través del cuerpo y se continúa hasta la base de la aleta caudal y que cubre (verticalmente) tres o cuatro escamas laterales, además difiere por tener una franja de color naranja-amarillo que se extiende desde el margen anterosuperior del ojo hasta el pedúnculo caudal por encima de la línea lateral en vida. Se diferencia de H. cyanotaenia, H. loretoensis, H. melanostichos, H. nigricinctus, H. herbertaxelrodi, H. eschwartzae, H. montogoi, H. psittacus, H. metae, H. margitae, H. vanzolinii, y H. peruvianus por tener solo 3 a 4 escamas con poros en la línea lateral, 21 a 24 escamas laterales y 6 dientes en la fila interna del premaxilar. Hyphessobrycon klausanni se diferencia de H. loretoensis por presentar 7 a 8 dientes maxilares (vs. 3 a 4) y la longitud del pedúnculo caudal (12.4–17.0% LE vs. 4.6–8.0% LE). Además se puede distinguir de las demás especies con banda lateral oscura presentes en la cuenca del rio Orinoco (H. metae y H. acaciae) por tener dos dientes en la fila externa del premaxilar (vs. 3 a 4) y 10 radios ramificados en la aleta pectoral (vs. 11 a 12), además se separa de H. metae por la longitud de hocico (17.6–22.8% LC vs. 9.9–15.2% LC) y por la longitud del pedúnculo caudal (12.4–17.0% LE vs. 7.3–11.8% LE).

Palabras clave: Nuevo taxón, Ictiología Neotropical, río Guaviare, diversidad

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Phycocharax rasbora • A New Genus and Species of Brazilian Tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós Basin ---ScRaBBlE

Phycocharax rasbora

Ohara, Mirande & de Lima, 2017 

DOI: 10.1371/journal.pone.0170648 

Abstract

A new genus and species of characid fish is described from rio Braço Norte, a tributary of rio Teles Pires, Tapajós basin, Mato Groso, Brazil. The new taxa can be diagnosed from the remaining characids by a unique combination of characters that includes the presence of a single row of relatively compressed premaxillary teeth, large teeth with four to nine cusps on premaxillary and dentary, absence of pseudotympanum, incomplete lateral line with 7–13 pored scales, sexually-dimorphic males with distal margin of anal fin approximately straight, and presence of a nearly triangular and horizontally elongated blotch from the posterior half of the body to caudal peduncle. The most parsimonious phylogenetic hypothesis, using morphological data, recovered the new genus and species in a clade including Paracheirodon axelrodi and Hyphessobrycon elachys.

Fig 3. Phycocharax rasbora, MZUSP 119843, paratype, 29.1 male (a) and MZUSP 115313, paratype, 26.4 mm SL, female (b), immediately after collection. 

Family Characidae Agassiz

Phycocharax, new genus.

Type species: Phycocharax rasbora, new species, by monotypy and original description.

Diagnosis: Phycocharax can be diagnosed from the remaining characid genera by the combination of the following character-states, none of them unique: 1) presence of single row of relatively compressed premaxillary teeth (Fig 2); 2) large teeth on premaxillary, and dentary with four to nine cusps (Fig 2); 3) pseudotympanum absent; 4) incomplete lateral line with 7–13 pored scales; 5) anal fin dimorphic, males with distal margin approximately straight, and decreasing gently posteriorly (Figs 1a and 3a), while females present slightly concave margin of anal fin with anteriormost branched rays distinctly longer than remaining rays (Figs 1b and 3b); 6) presence of horizontally-elongated somewhat triangular blotch extending from vertical through dorsal-fin terminus to caudal peduncle end (Figs 1 and 3).

Etymology: From the Greek phykos, meaning “algae”, in allusion to the feeding habit of the new taxon owing to the dominance of this resource in its stomach contents, plus charax, meaning “pointed stake” or “palisade of pointed sticks”, the first generic name in Characidae. Gender masculine.

Phycocharax rasbora, new species.

Distribution: Phycocharax rasbora is so far known only from its type locality at upper rio Braço Norte, a right-bank tributary of the rio Peixoto de Azevedo, part of rio Teles Pires drainage, rio Tapajós basin (Fig 5). The rio Braço Norte drains the Serra do Cachimbo at northern Mato Grosso State, Brazilian Amazon.

Etymology: From the Bengali word “rasbora”, the common name of the fish Rasbora rasbora (Hamilton). Rasbora is a generic name encompassed a great radiation of small cyprinids from southeastern Asia, including the species currently allocated in the genus Trigonostigma, which possess a dark triangular blotch on body sides very reminiscent in shape and position similarly as found in the new species. Gender masculine. A noun in apposition.

Willian Massaharu Ohara, Juan Marcos Mirande and Flávio Cesar Thadeo de Lima. 2017. Phycocharax rasbora, A New Genus and Species of Brazilian Tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós Basin.

  PLoS Biology. DOI: 10.1371/journal.pone.0170648

ResearchGate.net/publication/313758327_Phycocharax_rasbora_a_new_genus_and_species_of_Brazilian_tetra_Characiformes_Characidae_from_Serra_do_Cachimbo_rio_Tapajos_basin

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Astyanax taurorum • A New Species (Characiformes: Characidae) from dos Touros River, Pelotas River Drainage, An Upland southern Brazilian River ---ScRaBBlE

Astyanax taurorum 

 de Lucena, Zaluski & de Lucena, 2017 

    DOI: 10.3897/zoologia.34.e20174

Abstract

A new species of Astyanax belonging to the Astyanax scabripinnis complex is described from dos Touros River, tributary of the Pelotas River, Uruguay River basin. Astyanax taurorum sp. nov. is distinguished from other species of the Astyanax scabripinnis species complex by having two humeral spots, the first vertically elongated; teeth of inner row of premaxilla with three to five cusps; 2–3 (modes 2 or 3) maxillary teeth; 20–23 (mode 22) branched anal-fin rays; 13–15 (mode 14) gill rakers on lower branch of the first branchial arch; 20–23 (mode 21) total gill rakers in first branchial arch; 33–36 (mode 35) perforated lateral line scales. Astyanax taurorum sp. nov. is similar to Astyanax paris; nevertheless, it can be readily distinguished from it by having a smaller head depth (73.6-83.1% vs. 86.4–95.6%) and smaller interorbital width (24.1–28.0% vs. 30.8–32.8%). In addition, it differs from A. paris by the presence a posttemporal hook-shaped posterodorsal margin.

Key words: Taxonomy, Rio Grande do Sul, Uruguay River, distribution

Figure 1.  Astyanax taurorum sp. nov., MCP 49468, 80,7 mm SL, holotype, tributary of dos Touros River, Rio Grande do Sul, Brazil. 

Figures 5–6.  (5) Distribution of Astyanax taurorum sp. nov., white circle = type-locality. The symbol represents more than one locality; (6) stream tributary of dos Touros River, type locality of Astyanax taurorum sp. nov. 

Astyanax taurorum sp. nov.

Etymology: The specific name taurorum, is derived from the Latin masculine noun taurus (second declension, meaning bull) inflected in the plural and genitive case. Therefore taurorum means “of the bulls” in reference to “rio dos Touros“ (= Portuguese, which means “river of the bulls”) the type locality.

Distribution and habitat: Astyanax taurorum sp. nov. is known from the dos Touros River drainage, tributary of Pelotas River, which in turn is a tributary of Uruguay River (Fig. 5). The Pelotas River drainage is located in the region named “Campos de Altitude do Planalto das Araucárias (= Araucaria Plateau in Bertaco et al. 2016)” or “Campos de Cima da Serra”, which has a high level of endemism of fishes (Malabarba et al. 2009, Bertaco et al. 2016: 430) and other groups of animals (for example: sponges, Ribeiro et. al. 2009; crustaceans, Bond-Buckup et al. 2009). The dos Touros River tributary, type locality of Astyanax taurorum sp. nov., has a low to medium flow, transparent waters with stones and rocks on the bottom and moderate emergent marginal vegetation (Fig. 6). Four characid species were caught along with Astyanax taurorum sp. nov.: Bryconamericus patriciae Silva, 2004, B. iheringi Boulenger, 1887, Cheirodon interruptus Jenyns, 1842, and Oligosarcus brevioris Menezes, 1987.

 Carlos Alberto S. de Lucena, Amanda Bungi Zaluski and Zilda Margarete Seixas de Lucena. 2017. Astyanax taurorum A New Species from dos Touros River, Pelotas River Drainage, An Upland southern Brazilian River (Characiformes: Characidae). 
 Zoologia. 34; 1-8.  DOI: 10.3897/zoologia.34.e20174

ResearchGate.net/publication/319892392_Astyanax_taurorum_a_new_species_from_dos_Touros_River_Pelotas_River_drainage_an_upland_southern_Brazilian_river 

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

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كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Hyphessobrycon pinnistriatus • A New species of Hyphessobrycon (Ostariophysi, Characiformes) from the Rio Teles Pires, Rio Tapajós basin, Brazil ---ScRaBBlE

Hyphessobrycon pinnistriatus 

Carvalho, Cabeceira & Carvalho, 2017

 DOI: 10.1111/jfb.13362  

Abstract

A new species of Hyphessobrycon from the upper Rio Tapajós basin, in the Tapajós–Juruena ecoregion, is described. Hyphessobrycon pinnistriatus n. sp. is distinguished from its congeners by having a black, oblique stripe extending from the origin of the second branched ray to the distal end of the third branched anal-fin ray, lacking a conspicuous black midlateral stripe on the body, inner premaxillary teeth with up to seven cusps, and fins normally hyaline or with scattered chromatophores. The description of a new species that is restricted to the Tapajós–Juruena ecoregion is consistent with this region being an area of high endemism of freshwater fishes.

Figure 4.  Hyphessobrycon pinnistriatus, live specimen (same locality as holotype), not preserved (c. 26·0 mm standard length).

Hyphessobrycon pinnistriatus new species

Hyphessobrycon sp. 1 (Buckup et al., 2011: 243; list of species).

 Hyphessobrycon sp. n. (Battirola et al., 2015: 477 citation); Cabeceira et al. (2015: 199, 204; list of species and photo).

Diagnosis: Hyphessobrycon pinnistriatus differs from all congeners by having a black, oblique stripe that is largely parallels and covers the second and third anal-fin rays (Fig. 1), extending from the origin of the second branched ray to the distal end of the third branched anal-fin ray (v. anal fin hyaline, with uniformly distributed chromatophores, or margin blackish in all other species of Hyphessobrycon). Additionally, the new species can be distinguished from other congeners by lacking a conspicuous black midlateral stripe on the body, inner premaxillary teeth with up to seven cusps and from Hemigrammus unilineatus (Gill 1858), a non-congener but similar species, by having 20–23 branched anal-fin rays (v. 24–25), maxilla with two or three tetra to heptacuspidad maxillary teeth (v. three to seven tricuspidad maxillary teeth) and caudal fin lacking scales (v. caudal-fin lobes scaled).

Etymology: The species name is a combination of the Latin pinna, meaning fin and striatus, meaning stripe and is in reference to the black stripe on its anal fin. An adjective in apposition.

Ecological notes: The type locality of Hyphessobrycon pinnistriatus is a second order stream (sensu Strahler, 1957), known as an igarapé, surrounded by secondary forest in regeneration. The bottom of the stream is mainly composed of silt, with litter on the margins and few branches and trunks of a diameter greater than 10 cm. In the pools, there is flocculant sediment that is easily disturbed from submerged litter and macrophytes were found at sites with a little more water flow (Fig. 6). Most individuals of H. pinnistriatus were only observed in more lentic environments, swimming in small schools of five to 20 individuals. Individuals were also observed swimming alone and together with other species of Characidae, such as Moenkhausia phaeonota Fink 1979 and Hyphessobrycon heliacus Moreira, Landim & Costa 2002 near igarapé margins with depth ranging from 20 to 40 cm. Individuals were sometimes also observed foraging among the submerged litter in the igarapé margins (F. G. Cabeceira, pers. obs.). This species has also been found in habitats with faster water, no vegetation and substrata consisting of sand and mud.

.....

F. R. Carvalho, F. G. Cabeceira and L. N. Carvalho. 2017. New species of Hyphessobrycon from the Rio Teles Pires, Rio Tapajós basin, Brazil (Ostariophysi, Characiformes).  

 Journal of Fish Biology. DOI: 10.1111/jfb.13362 

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Ichthyology • 2017] Brachychalcinus reisi • A New Species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil ---ScRaBBlE

Brachychalcinus reisi 

Garcia-Ayala, Ohara, Pastana & Benine, 2017

  DOI:  10.11646/zootaxa.4362.4.5 

Abstract

Brachychalcinus reisi, a new species of characid fish, is described from the rio Curuá, tributary of rio Iriri, rio Xingu basin, Serra do Cachimbo, Pará State, Brazil. The new species can be distinguished from its congeners by the presence of a series of longitudinal black wavy stripes on the entire body and by a lower number of longitudinal scale rows between dorsal-fin origin and lateral line (7–8 vs. 8–12). Additionally, the new species differs from B. copei, B. parnaibae, and B. retrospina by the lower number of branched dorsal-fin rays (9 vs.10). This is the first description of a new species of the subfamily since the revisionary study of Stethaprioninae, published almost 30 years ago.

Keywords: Pisces, Stethaprioninae, Neotropical region, freshwater fishes, taxonomy, Amazon

FIGURE 4. Brachychalcinus reisi, MZUSP 119456, paratype, 57.3 mm SL, Brazil, Pará, Altamira, rio Curuá, rio Xingu basin. 

Brachychalcinus reisi new species

Etymology. The specific name reisi is in honor of Roberto Esser dos Reis, for his great contributions to the knowledge of the Stethaprioninae and the Neotropical ichthyology as a whole. A genitive noun.  

  FIGURE 6. Type-locality of Brachychalcinus reisi, Brazil, Pará, Altamira, upper rio Curuá, rio Xingu basin.  

James R. Garcia-Ayala, Willian M. Ohara, Murilo N. L. Pastana and Ricardo C. Benine. 2017. A New Species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil. Zootaxa. 4362(4); 564–574.  DOI:  10.11646/zootaxa.4362.4.5

  ResearchGate.net/publication/321650844_A_new_species_of_Brachychalcinus_from_the_rio_Xingu_basin_Serra_do_Cachimbo_Brazil

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.