[Ichthyology • 2018] Spectracanthicus javae • A New Species of the Genus Spectracanthicus (Loricariidae, Hypostominae, Ancistrini) from the Rio Javaיs (Rio Araguaia Basin), with A Description of Gross Brain Morphology ---ScRaBBlE

Spectracanthicus javae 

Chamon, Pereira, Mendonca & Akama, 2018

  DOI:  10.1111/jfb.13526  

Abstract

A new species of Spectracanthicus is described from the Rio Javaés, Rio Araguaia basin. The new species is distinguished from its congeners (except Spectracanthicus immaculatus) by colour pattern: body dark grey to dark brown without dots or blotches (v. body colour with yellowish small dots in Spectracanthicus murinus, Spectracanthicus punctatissimus and Spectracanthicus tocantinensis and large white dots in Spectracanthicus zuanoni). It can be further distinguished from S. immaculatus by having thicker and less numerous teeth, with up to eight premaxillary and 20 dentary teeth (v. teeth thinner and more numerous with up to 22 premaxillary and 30 dentary teeth); dorsal and caudal fins without curved spines (v. dorsal and caudal fins with curved spines). Other osteological characters can also diagnose the new species from its congeners. In addition, a gross brain description and brief comments on the new species' ecological habitat are given.

Figure 2. Colour in life of Spectracanthicus javae.

Spectracanthicus javae sp. nov.

Etymology: The specific epithet (a noun in apposition) is in reference to the Javaé people, an indigenous branch of the Karajá people in Brazil who inhabit the Ilha do Bananal and confer the name of the river (Rio Javaés), where the new species was reported.

C. C. Chamon, T. N. A. Pereira, M. B. Mendonca and A. Akama. 2018.  New Species of the Genus Spectracanthicus (Loricariidae, Hypostominae, Ancistrini) from the Rio Javaיs (Rio Araguaia Basin), with A Description of Gross Brain Morphology. Journal of Fish Biology.   DOI:  10.1111/jfb.13526 

 facebook.com/israquarium/photos/1676916349041624 

 facebook.com/IchthyologyoftheWorld/photos/1774881345865988 

Carine C. Chamon and Lúcia H. Rapp Py-Daniel. 2014. Taxonomic revision of Spectracanthicus Nijssen & Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species. Neotropical Ichthyology. 12(1):1-25. 

 scielo.br/pdf/ni/v12n1/1679-6225-ni-12-01-00001.pdf

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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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] Gymnocranius obesus • A New Large-eye Seabream from the Coral Triangle ---ScRaBBlE

Gymnocranius obesus 

Chen, Miki & Borsa, 2017

Obese Large-eye Seabream  | DOI: 10.1016/j.crvi.2017.08.004  

Abstract

Two previously recorded new species of the large-eye seabream genus Gymnocranius (Gymnocranius sp. D and Gymnocranius sp. E) remain undescribed. Here we describe Gymnocranius sp. E as Gymnocranius obesus sp. nov. This new species is morphologically distinct from all other known species under Gymnocranius by the following combination of characters: relatively deep body, with ratio of standard length to body depth 2.2–2.4; protruding large eye, with eye diameter about equal to or slightly larger than inter-orbital width; caudal fin moderately forked; no blue spots or wavy blue lines on cheek and snout in adults; fourth transversal dark bar on flank running from the sixth spine of the dorsal fin to the origin of the anal fin; anal, caudal and dorsal fins drab with yellowish to yellow margins. Gymnocranius obesus sp. nov. is distinct from G. griseus, with which it has been previously confused by a relatively larger head, scales above lateral line without dark basal patch, and a smaller number of front scales on the dorsal side of the head. Gymnocranius obesus sp. nov. is genetically distinct from its closest known relative, Gymnocranius sp. D by 104 diagnostic nucleotide characters, which translates into a 9.6% sequence divergence at the mitochondrial cytochrome b gene. Gymnocranius obesus sp. nov. reaches a length of at least 295 mm. Its distribution, from the Ryukyu Islands to Bali, including Taiwan and the Flores Sea, mostly coincides with the western half of the Coral Triangle.

Keywords: New species, Indo-West Pacific, Gymnocranius sp. D, Gymnocranius griseus

Gymnocranius obesus sp. nov. 

 Previously referred to as Gymnocranius sp. E [Borsa, et al., 2013],

Gymnocranius sp. 1 [Anonymous, 2016],

Gymnocranius griseus [Chiang, et al., 2014],

and Gymnocranius grandoculis [Shao, 2016].

Diagnosis: Gymnocranius obesus sp. nov. differs from its morphologically close congeners G. griseus and Gymnocranius sp. D by the number of front scales on the top of the head, and by the dark-bar patterns on flanks. While the fourth transversal dark bar in G. obesus sp. nov. runs from the basis of the sixth spine of the dorsal fin down to the origin of the anal fin, the one in G. griseus, when visible, runs down from the base of the sixth dorsal spine to the abdomen (Table 3). That in Gymnocranius sp. D descends from the sixth dorsal spine to the extremity of abdomen, before the anus (Table 3).

Along the cytochrome b gene, the following apomorphic sites have nucleotides shared by all five specimens of G. obesus sp. nov. examined so far, that are not present in G. elongatus, G. euanus, G. grandoculis, G. griseus, G. oblongus, G. satoi, G. superciliosus and Gymnocranius sp. D: Nos. 61, 108, 117, 135, 153, 165, 300, 303, 318, 375, 501, 564, 627, 630, 684, 756, 765, 816, 967, 972, and 1032. These nucleotide sites can be used for the diagnosis of G. obesus sp. nov. relative to G. griseus and Gymnocranius sp. D.

Etymology: Epithet obesus is the Latin translation of obese, a reference to the deep and relatively thick body shape of the specimens of this species. We propose the Obese Large-eye Seabream as vernacular name for G. obesus sp. nov.

Fig. 1. Type series of Gymnocranius obesus sp. nov. 
A. Specimen NTUM 12079 (sample Let1006), holotype, standard length (SL) 270 mm, collected 3 October 2013 from off Fugang, Taitung, Taiwan (photographed by WJC). B. Specimen MUFS 25522, paratype, SL 295 mm, from off Anbo, Yaku-shima Island, Kagoshima prefecture, Japan (30°19′N, 130°39′E), 11 August 2008 (photographed by the MUFS fish team). C. Specimen MUFS 41271, paratype, SL 209 mm, purchased at Tomari-Fish Market (26°14′N, 127°41′E), Okinawa Island, Japan, 27 October 2012 (photographed by RM). D. Specimen MUFS 41272, paratype, SL 244 mm, purchased at the same place and same date (photographed by RM). E. Specimen NTUM 10766 (Let998), paratype, SL195 mm, from Fugang fishing port, Taiwan, 03 October 2013 (photographed by WJC). F. Specimen NTUM 10766 (Let999), paratype, SL220 mm, from Fugang fishing port, Taiwan, 03 October 2013 (photographed by WJC). G. Specimen NTUM 10766 (Let1004), paratype, SL192 mm, from Fugang fishing port, Taiwan, 03 October 2013 (photographed by WJC). H. Specimen NTUM 10766 (Let1005), paratype, SL239 mm, from Fugang fishing port, Taiwan, 03 October 2013 (photographed by WJC). 

 Wei-Jen Chen, Ryohei Miki and Philippe Borsa. 2017. Gymnocranius obesus, A New Large-eye Seabream from the Coral Triangle. Comptes Rendus Biologies. In Press. DOI: 10.1016/j.crvi.2017.08.004 

2017. Gymnocranius obesus, un nouveau bossu blanc du Triangle de Corail. 

Résumé: Deux nouveaux bossus blancs du genre Gymnocranius, précédemment signalés comme Gymnocranius sp. D et Gymnocranius sp. E, restent non décrits. Nous décrivons ici Gymnocranius sp. E comme Gymnocranius obesus sp. nov. Cette nouvelle espèce est morphologiquement distincte de toutes les autres espèces connues du genre Gymnocranius par la combinaison de caractères suivante : corps relativement haut, où le rapport de la longueur standard à la hauteur du corps est 2,2–2,4 ; œil saillant, large, dont le diamètre est approximativement égal ou légèrement supérieur à la distance interorbitaire ; nageoire caudale modérément fourchue ; pas de taches bleues ni de lignes bleues ondulées sur la joue et le museau chez les adultes ; quatrième barre transversale sombre sur le flanc allant de la base du sixième rayon de la nageoire dorsale à l’origine de la nageoire anale ; bord externe des nageoires anale, caudale et dorsale jaunâtre à jaune. Gymnocranius obesus sp. nov. se distingue de G. griseus, avec lequel il a été précédemment confondu, par une tête relativement plus grande, des écailles au-dessus de la ligne latérale sans patch basal sombre, et un plus petit nombre d’écailles frontales sur le dos de la tête. Gymnocranius obesus sp. nov. est génétiquement distinct de son plus proche parent connu, Gymnocranius sp. D, par 104 caractères nucléotidiques diagnostiques au gène mitochondrial du cytochrome b, ce qui se traduit par une divergence de séquence de 9,6 %. Gymnocranius obesus sp. nov. atteint au moins 295 mm de longueur. Sa distribution, des îles Ryukyu à Bali en passant par Taïwan et la mer de Flores, coïncide essentiellement avec la moitié ouest du Triangle de Corail.

Mots clés: Nouvelle espèce, Indo-Pacifique ouest, Gymnocranius sp. D, Gymnocranius griseus

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

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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] A Revision of Paracanthocobitis zonalternans (Cypriniformes: Nemacheilidae) Species Complex with Descriptions of Three New Species ---ScRaBBlE

FIGURE 4. Paracanthocobitis zonalternans from the Salween drainage, Thailand.

 UF 188197, Mae Hong Son Province, live

 photo by Z. S. Randall (UF).

 DOI: 10.11646/zootaxa.4324.1.5

Abstract

The Paracanthocobitis zonalternans species complex is revised based on analysis of morphological and molecular data. Three new species, P. nigrolineata, P. marmorata, and P. triangula are described, and P. phuketensis is removed from synonymy. All species are described morphologically, geographic ranges are delimited, and relationships are discussed for those for which molecular data (cytochrome c oxidase subunit 1 - COI) are available. In view of the morphological similarities of some of the species, a surprising result of this study was the moderately large genetic distances among species. Uncorrected COI p-distances between geographic clades of P. zonalternans ranged from 7.6–9.3%, suggesting that the species are reproductively isolated from one another even though morphological changes are minor. Paracanthocobitis phuketensis, distributed in several rivers draining to the Gulf of Thailand and to the Andaman Sea, shows considerable intraspecific variation that should be explored in detail for historical and ecological explanations. Cobitis chlorosoma McClelland, 1839 from Assam, India, is a synonym of P. botia, not P. zonalternans.

Keywords:  Pisces, Cypriniformes, Southeast Asia, zipper loaches, Acanthocobitis

Paracanthocobitis zonalternans (Blyth, 1860) 

Dwarf Zipper Loach

Cobitis zonalternans Blyth, 1860:172. Type locality: Tenasserim provinces, Burma. Two syntypes (Day, 1869:551; Day, 1872:186), presumed lost (Hora, 1929:319). Neotype, ZSM 27468, designated by Kottelat, 1990:42, Huai Mae Charno, 4 km south Amphoe Mae Ramat on road 1085 [approximately 16.967N, 98.567E], Tak Province, Salween drainage, Thailand. 

Nemacheilus zonalternans.—Day, 1869:551. 

Nemachilus zonalternans.—Day, 1889:232. 

Noemacheilus zonalternans.—Sen, 1985:119, fig. 63. 

Acanthocobitis zonalternans.—Kottelat, 1990:13. 

Acanthocobitis (Paracanthocobitis) zonalternans.—Grant, 2007:3.

  Paracanthocobitis zonalternans.—Singer & Page, 2015:396.

Diagnosis. Paracanthocobitis zonalternans is distinguished from all other species of Paracanthocobitis by combination of incomplete lateral line ending near dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; axillary pelvic lobe present; series of black blotches, usually without black stripe but with faint dusky stripe, along side of body, usually ending near dorsal-fin insertion; circular black spot on upper margin of caudal-fin base; black pigment extending from lateral stripe onto pectoral-fin base; no marmorated pattern anterior to dorsal-fin origin; dorsal saddles short, rarely connecting to lateral blotches; 8 (occasionally 7) branched upper caudal-fin rays. 

Distribution. Paracanthocobitis zonalternans is known from the Salween River drainage in Thailand and Myanmar (Fig. 5).

Paracanthocobitis phuketensis (Klausewitz, 1957)

 Phuket Zipper Loach 

 Noemacheilus phuketensis Klausewitz, 1957:195, fig. 1. Type locality: Phuket Island, Thailand. Holotype: SMF 3966. 

Acanthocobitis phuketensis.—Bănărescu & Nalbant, 1964:160. 

Noemacheilus (Acanthocobitis) phuketensis.—Bănărescu & Nalbant, 1968:322.

 Diagnosis. Paracanthocobitis phuketensis is distinguished from all other species of Paracanthocobitis by combination of incomplete lateral line ending near dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; axillary pelvic lobe usually absent, occasionally rudimentary; series of black blotches, sometimes overlain with faint dusky stripe along side of body not obscuring lateral blotches, ending near caudal-fin; circular black spot on upper margin of caudal-fin base; black pigment not extending from black blotches along side of body onto pectoral-fin base; no marmorated pattern anterior to dorsal-fin origin; dorsal saddles longer than interspaces, frequently connecting to lateral blotches; 7–8 branched upper caudal-fin rays. 

Distribution. Paracanthocobitis phuketensis is known from Peninsular Thailand in the Panang Tak drainage and on Phuket Island, south to the Perlis, Padang Sarai, and Ketil drainages of Peninsular Malaysia (Fig. 5).

Paracanthocobitis nigrolineata, new species 
Blacklined Zipper Loach

Diagnosis. Paracanthocobitis nigrolineata is distinguished from all other species of Paracanthocobitis by combination of incomplete lateral line ending near dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; axillary pelvic lobe present; black stripe along side of body, ending near caudal-fin, usually overlying black lateral blotches extending ventrally from lateral stripe; circular black spot on upper margin of caudal-fin base; black pigment extending from lateral stripe onto pectoral-fin base; no marmorated pattern anterior to dorsal-fin origin; black dorsal saddles short, not connecting to lateral blotches; 8 branched upper caudal-fin rays.

Distribution. Paracanthocobitis nigrolineata is known from Irrawaddy and Sittang drainages of Myanmar and the Mae Khlong drainage of Thailand with a large geographic gap in-between (Fig. 5). This gap is likely due to the paucity of sampling in Myanmar.

Etymology. The epithet nigrolineata refers to the black stripe along the side of the body.


Paracanthocobitis triangula, new species 
Wedged Zipper Loach

Diagnosis. Paracanthocobitis triangula is distinguished from all other species of Paracanthocobitis by combination of incomplete lateral line ending near dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; axillary pelvic lobe present; series of black blotches, sometimes overlain with faint dusky stripe along side of body not obscuring lateral blotches, ending just beyond dorsal-fin insertion; small black triangular blotch in ocellus on upper margin of caudal-fin base; black pigment of the midlateral stripe not extending onto pectoral-fin base; no marmorated pattern between dorsal saddles and lateral blotches; dorsal saddles usually extending ventrally just past faint lateral stripe, usually connecting to lateral blotches; 8 branched upper caudal-fin rays.

Distribution. Paracanthocobitis triangula is known from the Brahmaputra (Jamuna) and Meghna drainages of Bangladesh (Fig. 5).
Etymology. The epithet triangula refers to the usual presence of a small black triangular blotch in the ocellus on the upper margin of the caudal peduncle.


Paracanthocobitis marmorata, new species
 Marmorated Zipper Loach

Diagnosis. Paracanthocobitis marmorata is distinguished from all other species of Paracanthocobitis by combination of incomplete lateral line ending just beyond dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; no axillary pelvic lobe; no black stripe along side of body; marmorated pattern of dark lines and blotches between irregularly shaped dorsal saddles dark blotches along side of body; teardrop-shaped black spot on upper margin of caudal-fin base; 8 branched upper caudal-fin rays.

Distribution. Paracanthocobitis marmorata is known from the Barak drainage of Assam, India (Fig. 5).

Etymology. The epithet marmorata refers to the marmorated pattern on the nape and between the dorsal saddles and lateral blotches in lieu of the black stripe along the side of the body typical of other members of the P. zonalternans complex.

 Randal A. Singer, John M. Pfeiffer and Lawrence M. Page. 2017. A Revision of the Paracanthocobitis zonalternans (Cypriniformes: Nemacheilidae) Species Complex with Descriptions of Three New Species. Zootaxa. 4324(1); 85–107.  DOI: 10.11646/zootaxa.4324.1.5

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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] Goliath Catfish (Brachyplatystoma spp., Pimelodidae) Spawning in the far western Amazon confirmed by the Distribution of Mature Adults, Drifting Larvae and Migrating Juveniles ---ScRaBBlE

Figure 1: Migratory goliath catfishes (Brachyplatystoma, Pimelodidae).
 (A) Brachyplatystoma vaillantii (piramutaba in Portuguese, pirabutón in Spanish); (B) B. rousseauxii (dourada in Portuguese, dorado in Spanish); (C) B. platynemum (babão in Portuguese, mota flemosa in Spanish); (D) B. juruense (zebra in Portuguese, zebra in Spanish);
(lower) Dorado migrations exploited by fishermen. The Santo Antônio Dam on the Madeira River now drowns the Teotônio Rapids (shown here) where B. rousseauxii (species in photo) and B. platynemum were previously exploited and easily detected when migrating.

Photos by M. Goulding.   DOI: 10.1038/srep41784 

Abstract

We mapped the inferred long-distance migrations of four species of Amazonian goliath catfishes (Brachyplatystoma rousseauxii, B. platynemum, B. juruense and B. vaillantii) based on the presence of individuals with mature gonads and conducted statistical analysis of the expected long-distance downstream migrations of their larvae and juveniles. By linking the distribution of larval, juvenile and mature adult size classes across the Amazon, the results showed: (i) that the main spawning regions of these goliath catfish species are in the western Amazon; (ii) at least three species — B. rousseauxii, B. platynemum, and B. juruense — spawn partially or mainly as far upstream as the Andes; (iii) the main spawning area of B. rousseauxii is in or near the Andes; and (iv) the life history migration distances of B. rousseauxii are the longest strictly freshwater fish migrations in the world. These results provide an empirical baseline for tagging experiments, life histories extrapolated from otolith microchemistry interpretations and other methods to establish goliath catfish migratory routes, their seasonal timing and possible return (homing) to western headwater tributaries where they were born.

Dorado migrations exploited by fishermen. The Santo Antônio Dam on the Madeira River now drowns the Teotônio Rapids (shown here) where Brachyplatystoma rousseauxii (B) and B. platynemum (C) were previously exploited and easily detected when migrating.

Photos by M. Goulding.   DOI: 10.1038/srep41784  

Figure 1: Migratory goliath catfishes (Brachyplatystoma, Pimelodidae).
(A) Brachyplatystoma vaillantii (piramutaba in Portuguese, pirabutón in Spanish); (B) B. rousseauxii (dourada in Portuguese, dorado in Spanish); (C) B. platynemum (babão in Portuguese, mota flemosa in Spanish); (D) B. juruense (zebra in Portuguese, zebra in Spanish); (E) Dorado migrations exploited by fishermen. The Santo Antônio Dam on the Madeira River now drowns the Teotônio Rapids (shown here) where B. rousseauxii (species in photo) and B. platynemum were previously exploited and easily detected when migrating. Photos by M. Goulding. 

Ronaldo B. Barthem, Michael Goulding, Rosseval G. Leite, Carlos Cañas, Bruce Forsberg, Eduardo Venticinque, Paulo Petry, Mauro L. de B. Ribeiro, Junior Chuctaya and Armando Mercado. 2017. Goliath Catfish Spawning in the far western Amazon confirmed by the Distribution of Mature Adults, Drifting Larvae and Migrating Juveniles.  

 Scientific Reports. 7, Article number: 41784. DOI: 10.1038/srep41784

   

Extraordinary migration of giant Amazon catfish revealed
theguardian.com/environment/2017/feb/07/extraordinary-migration-giant-amazon-catfish-revealed

Giant catfish clocks longest ever freshwater migration https://news.mongabay.com/2017/02/giant-catfish-clocks-longest-ever-freshwater-migration/ via @mongabay

Scientists confirm dorado catfish as all-time distance champion of freshwater migrations  scienmag.com/scientists-confirm-dorado-catfish-as-all-time-distance-champion-of-freshwater-migrations/ via @scienmag

http://voices.nationalgeographic.com/2014/05/23/recognizing-world-fish-migration-day-in-the-amazons-waters/

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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] A Revision of the Grunter Genus Syncomistes (Teleostei, Terapontidae) with Descriptions of Seven New Species from the Kimberley region, northwestern Australia ---ScRaBBlE

Syncomistes versicolor 

Shelley, Delaval & Le Feuvre, 2017

   DOI:  10.11646/zootaxa.4367.1.1 

Abstract

The systematics of the genus Syncomistes Vari, 1978 endemic to freshwater habitats of remote northwestern Australia, is reviewed in light of recent collections in the region and a fine scale molecular study of the group that identified new taxa. Based primarily on external morphology, seven taxa are described as new: Syncomistes bonapartensis sp. nov., S. carcharus sp. nov., S. dilliensis sp. nov., S. holsworthi sp. nov., S. moranensis sp. nov., S. wunambal sp. nov. and S. versicolor sp. nov. The species complexes Syncomistes butleri Vari, 1978 and S. trigonicus Vari, 1978 are resolved and redescribed, and S. kimberleyensis Vari, 1978 and S. rastellus Vari & Hutchins, 1978 are redescribed based on juvenile and adult specimens. Finally, a neotype is provided for S. trigonicus sensu stricto in place of the destroyed holotype. Meristic and morphometric data are collected and analysed for the entire genus. Syncomistes have a broad range of meristic and morphometric character differences between species, and juveniles and adults, as well as variations in colour. The head, particularly feeding structures such as the jaw and dentition, were found to be the most important morphological features in discriminating between taxa. Some characters undergo distinct ontogenetic shifts in form, which are discussed. Of note, four of the new species, and seven from the entire genus, are narrow-range endemics, each found in single river systems, and are thus of conservation concern.

Keywords: Pisces, Cryptic species, sympatric, range-restricted, freshwater, biodiversity, taxonomy, systematics, neotype

• Syncomistes butleri Vari, 1978  

• Syncomistes kimberleyensis Vari, 1978  

• Syncomistes rastellus Vari & Hutchins, 1978 

• Syncomistes trigonicus Vari, 1978  

• Syncomistes bonapartensis, new species

English vernacular name: Lake Bonaparte Grunter.

Etymology: The specific name bonapartensis refers to the distribution of the species that is confined to drainages that once flowed into the paleolake, Lake Bonaparte.

• Syncomistes carcharus, new species

English vernacular name: Sharp-toothed Grunter.

Etymology: The specific name carcharus is Latin for sharp teeth, and refers to the robust, pointed teeth of the species, relative to other Syncomistes.

• Syncomistes dilliensis, new species

English vernacular name: Dillie Grunter.

Etymology: The specific name dilliensis refers to the type locality, Dillie Gorge, on the Charnley River, Western Australia.

• Syncomistes holsworthi, new species

 English vernacular name: Holsworth’s Grunter.

Etymology: The specific name holsworthi honors Bill Holsworth whose foundation financed the expedition on which this species was found, as well as providing ongoing support for doctoral research into the ecology, management and natural history of Australian wildlife.

• Syncomistes moranensis, new species

English vernacular name: Moran Grunter.

Etymology: The specific name moranensis refers to the type locality, the Moran River, which is also the only known location of the species.

• Syncomistes versicolor, new species

English vernacular name: The Many-coloured Grunter.

Etymology: The specific name versicolor is Latin for many-coloured and refers to the distinct changes in the colour of the species at different stages in its ontogeny.

• Syncomistes wunambal, new species

 English vernacular name: Wunambal Grunter.

Etymology: Named wunambal, to be treated as a noun in apposition, for the Wunambal tribe and language group from the Mitchell River area, in which the fish is found.

James J. Shelley, Aurélien Delaval and Matthew C. Le Feuvre. 2017. A Revision of the Grunter Genus Syncomistes (Teleostei, Terapontidae) with Descriptions of Seven New Species from the Kimberley region, northwestern Australia. Zootaxa. 4367(1); 1–103.  DOI:  10.11646/zootaxa.4367.1.1

We discovered 20 new fish in northern Australia – now we need to protect them theconversation.com/we-discovered-20-new-fish-in-northern-australia-now-we-need-to-protect-them-52905  @ConversationEDU

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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] Redescription of the Bump-head Sunfish Mola alexandrini (Ranzani 1839), senior synonym of Mola ramsayi (Giglioli 1883), with Designation of A Neotype for Mola mola (Linnaeus 1758) (Tetraodontiformes: Molidae) ---ScRaBBlE

Mola alexandrini (Ranzani 1839)

Sawai, Yamanoue, Nyegaard & Sakai, 2017.  

  DOI: 10.1007/s10228-017-0603-6  

Abstract

The genus Mola of ocean sunfishes (family Molidae) is currently composed of three species: Mola mola (Linnaeus 1758), Mola ramsayi (Giglioli 1883), and Mola tecta Nyegaard et al. 2017. For a comprehensive revision of the genus, both literature survey and morphological investigations of Molidae were conducted. We found Mola alexandrini (Ranzani 1839) to be synonymous with M. ramsayi and we herein redescribe M. alexandrini based on the rediscovered dried holotype and 21 other fresh and preserved specimens. Mola alexandrini can be distinguished from other species of Mola by the following combination of characters in adults: head profile with bump; chin with bump; body scales rectangular; clavus rounded, supported by 14–24 (mode 17) clavus fin rays and 8–15 (12) ossicles on the rear margin. A neotype of M. mola is designated for comparison with M. alexandrini, as these two species have long been confused.

Keywords: Morphology, Neotype, Ocean sunfish, Redescription, Synonymy 

Mola alexandrini  bump-head sunfish

photo: Hasama Underwater Park 

Mola alexandrini (Ranzani 1839)

(Japanese name: Ushi-manbo; New English name: Bump-head sunfish)  

Orthragoriscus alexandrini Ranzani 1839:...

Orthragoriscus ramsayi Giglioli 1883:...

Orthagoriscus mola: Williams 1893:...

Masturus lanceolatus (not of Liénard): Gudger 1937: ...

Mola mola (not of Linnaeus): ...

Mola ramsayi: Whitley 1931: ...

Mola ramsayi Atlantic group: Bass et al. 2005: ....

Mola mola group A: Yoshita et al. 2005: 171.

Mola sp. group A: Yoshita et al. 2009: ....

Mola sp. A: Sawai et al. 2009: ....

Distribution and ecological notes. Mola alexandrini is widely distributed in the world’s oceans except for the polar regions (Fig. 5a; ESM Table S1); collected from waters off Japan, Taiwan, Galápagos Islands, New Zealand, Australia, Turkey, Oman, and Spain (Yamanoue et al. 2004, 2010; Bass et al. 2005; Sagara et al. 2005; Yoshita et al. 2005, 2009; Sawai et al. 2009, 2011, 2017a; Yamanoue and Sawai 2012; Thys et al. 2013, Ahuir-Baraja et al. 2017; Nyegaard et al. 2017). Mola alexandrini presumably prefers warmer water temperatures than inhabited by Mola mola; in waters off the Sanriku coast of Japan, sea surface temperatures during the occurrence of M. alexandrini (16.8–25.6°C, average 19.9°C) were on average higher than during the occurrence of M. mola (11.5–25.6°C, average 17.7°C) (Sawai et al. 2011).

Etsuro Sawai, Yusuke Yamanoue, Marianne Nyegaard and Yoichi Sakai. 2017. Redescription of the Bump-head Sunfish Mola alexandrini (Ranzani 1839), senior synonym of Mola ramsayi (Giglioli 1883), with Designation of A Neotype for Mola mola (Linnaeus 1758) (Tetraodontiformes: Molidae). Ichthyological Research.  DOI: 10.1007/s10228-017-0603-6

World’s heaviest bony fish identified and correctly named

Researchers clear up confusion between taxonomy of multiple species of ocean sunfishes

springer.com/gb/about-springer/media/research-news/all-english-research-news/world-s-heaviest-bony-fish-identified-and-correctly-named/15270666

 eurekalert.org/pub_releases/2017-12/s-whb120517.php

Fisch der Superlative stellt eine neue Art dar  derstandard.at/2000069439190/Fisch-der-Superlative-stellt-eine-neue-Art-dar via @derStandardat

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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.