[Ichthyology • 2017] Centrophorus longipinnis & C. lesliei • Revision of the Genus Centrophorus (Squaliformes: Centrophoridae): Part 2—Description of Two New Species of Centrophorus and Clarification of the Status of Centrophorus lusitanicus ---ScRaBBlE

Centrophorus longipinnis

 White, Ebert & Naylor, 2017

DOI:  10.11646/zootaxa.4344.1.3 

Abstract

Centrophorus specimens with a distinctive long-based first dorsal fin (long-finned species) have previously been considered to be Centrophorus lusitanicus first described from Portugal. Critical examination of the original description and illustration reveal that C. lusitanicus should be considered a junior synonym of C. granulosus. However, the specimen considered to be the syntype of C. lusitanicus in the Natural History Museum in London is clearly a long-finned species and not conspecific with C. granulosus. A more detailed investigation revealed that this specimen should not be considered a syntype and was likely not originally collected off the coast of Portugal. Investigation of long-finned specimens of Centrophorus from the Indo-West Pacific and Eastern Atlantic revealed that two undescribed species exist and are herein formally described as Centrophorus lesliei and C. longipinnis. The two species are similar morphologically and belong to the long-snout Centrophorus group (e.g. C. isodon and C. harrissoni) but are clearly separable based on their very long first dorsal fins. The two species differ in relative length of the first dorsal fin and several other characters. They also differ genetically. Nonmetric multidimensional ordination based on morphometric data reveals both species level and ontogenetic differences. A short erratum is also provided for Part 1 of this revision of the Centrophorus due to two figure related errors which may cause some confusion.

Keywords:  Pisces, Centrophorus, new species, Eastern Atlantic, Indo-West Pacific, genetics, taxonomy

FIGURE 11. Lateral view of Centrophorus longipinnis n. sp.:
 (A) adult male holotype (NMMB-P 15756, 720 mm TL); (B) female paratype (CSIRO H 8104 - 01, 855 mm TL); (C) female paratype (CSIRO H 7990 - 02, 825 mm TL); (D) late-term embryo paratype (CSIRO H 8103 - 02, 346 mm TL).

Centrophorus longipinnis n. sp.

Longfin Gulper Shark

 Etymology. Specific name a combination of the Latin longus (long) and pinna (fin) in allusion to the very distinctive long-based first dorsal fin this species possesses.

Distribution. Type material from off Taiwan (Cheng-gong and Da-xi fish landing sites—local fishing grounds), Indonesia (off southwest Java and eastern Lombok), and Papua New Guinea (Huon Gulf) (Fig. 10). Compagno et al. (2005) reported this species off Puerto Princesa City in the Philippines (JPAG 226, tissue accession GN4348); differed slightly in ND2 sequence and specimen not examined in this study. Limited depth information available as most specimens collected from fish landing sites; caught from depths of 330–460 m in Papua New Guinea (P. Neira, pers. comm.).

Centrophorus lesliei n. sp.

African Gulper Shark

Etymology. Named after Dr Robin Leslie (Fisheries Branch, Department of Agriculture, Forestry and Fisheries in South Africa) who has contributed greatly to our knowledge of southern African chondrichthyans and provided numerous important specimens and tissue samples for various projects.

Distribution. Type specimens were from the Mozambique Channel (Madagascar and Mozambique), and off Senegal, Côte d’Ivoire, Equatorial Guinea, and Togo at depths of 340– 500 m. The BMNH and ZMB specimens were most likely collected by Anchieta from Angola or Mozambique in the 1800’s. Additional specimens examined by Munoz-Chapuli & Ramos (1989) were recorded as being collected from Morocco, the Canary Islands, and Ghana at depths of 370– 610 m.

William T. White, David A. Ebert and  Gavin J. P. Naylor. 2017. Revision of the Genus Centrophorus (Squaliformes: Centrophoridae): Part 2—Description of Two New Species of Centrophorus and Clarification of the Status of Centrophorus lusitanicus Barbosa du Bocage & de Brito Capello, 1864. Zootaxa. 4344(1); 86–114. DOI:  10.11646/zootaxa.4344.1.3

 twitter.com/WillWhitesharks/status/927363194321903617

White, W.T., Ebert, D.A., Naylor, G.J.P., Ho, H.-C., Clerkin, P., Verissimo, A. and Cotton, C. 2013. Revision of the genus Centrophorus (Squaliformes, Centrophoridae), Part 1—Redescription of Centrophorus granulosus (Bloch & Schneider), a senior synonym of C. acus Garman and C. niaukang Teng. Zootaxa. 3752(1); 35–72.  DOI:  10.11646/zootaxa.3752.1.5

ResearchGate.net/publication/259444515_Revision_of_the_genus_Centrophorus_Part_1

---------------------------------------------------------------

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] Notoraja sereti • A New Species of Velvet Skate (Rajiformes: Arhynchobatidae) from Papua New Guinea ---ScRaBBlE

Notoraja sereti 

White, Last & Mana, 2017  

DOI:  10.11646/zootaxa.4244.2.4   

Abstract

A new arhynchobatin skate, Notoraja sereti n. sp., is described based on three specimens collected from off Madang (Papua New Guinea) at depths of 800–980 m. This medium-size Notoraja skate shares with other velcro skates from the Western Pacific, N. alisae, N. fijiensis, N. inusitata and N. longiventralis, a ventral surface covering of fine denticles giving the skin a velvety feel. Notoraja sereti differs from all of these species in having a shorter snout (preorbital length 10.1–11.1 vs. 11.5–14.5% TL, prenasal length 8.2–8.9 vs, 9.8–12.1% TL), shorter head (dorsal head length 15.2–16.2 vs. 17.1–19.3% TL, ventral head length 21.6–22.9 vs. 22.9–25.9% TL), fewer pectoral-fin radials (total radials 58–60 vs. 61–74), and fewer vertebrae (predorsal diplospondylous centra 66–71 vs. 72–82, predorsal centra 90–95 vs. 98–107, total centra 126–131 vs. 135–152).

Keywords: Pisces, Notoraja, new species, velcro skate, Papua New Guinea

FIGURE 1: Dorsal view of the holotype of Notoraja sereti n. sp. (NTUM 10067, female 459 mm TL) immediately post-capture. 

Etymology. Named after the highly respected French ichthyologist, Dr. Bernard Séret, who has contributed greatly to the taxonomy of sharks and rays, and in particular to our knowledge of skates of the genus Notoraja. English name: Papuan Velvet Skate.

White, William T., Peter R. Last & Ralph R. Mana. 2017. A New Species of Velvet Skate, Notoraja sereti n.sp. (Rajiformes: Arhynchobatidae) from Papua New Guinea. Zootaxa. 4244(2); 219–230.  DOI:  10.11646/zootaxa.4244.2.4

---------------------------------------------------------------

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 • 2019] Carcharhinus obsolerus • Lost before Found: A New Species of Whaler Shark (Carcharhiniformes: Carcharhinidae) from the Western Central Pacific known only from Historic Records ---ScRaBBlE

Carcharhinus obsolerus

White, Kyne & Harris, 2019

Lost Shark  || DOI: 10.1371/journal.pone.0209387  

Painting by Lindsay Marshall (www.stickfigurefish.com.au) 

twitter.com/WillWhitesharks

Abstract

Carcharhinus obsolerus is described based on three specimens from Borneo, Thailand and Vietnam in the Western Central Pacific. It belongs to the porosus subgroup which is characterised by having the second dorsal-fin insertion opposite the anal-fin midbase. It most closely resembles C. borneensis but differs in tooth morphology and counts and a number of morphological characters, including lack of enlarged hyomandibular pores which are diagnostic of C. borneensis. The historic range of C. obsolerus sp. nov. is under intense fishing pressure and this species has not been recorded anywhere in over 80 years. There is an urgent need to assess its extinction risk status for the IUCN Red List of Threatened Species. With so few known records, there is a possibility that Carcharhinus obsolerus sp. nov. has been lost from the marine environment before any understanding could be gained of its full historic distribution, biology, ecosystem role, and importance in local fisheries.

Fig 1. Lateral view of Carcharhinus obsolerus sp. nov. (NMW 61463; female holotype 433 mm TL).
A. Preserved specimen; B. Painting by Lindsay Marshall (www.stickfigurefish.com.au). 

Fig 2. Head of Carcharhinus obsolerus sp. nov. (NMW 61463; Holotype). 433 mm TL female:
A. lateral view; B. ventral view.

Fig 5. In situ teeth of Carcharhinus obsolerus sp. nov. (ANSP 77121, paratype). 370 mm TL female:
A. upper teeth; B. lower teeth.

Carcharhinus obsolerus White, Kyne & Harris sp. nov.  

Synonymy: Carcharhinus sp.: [Compagno, 1979]: 517, 520, 523, 536 (Borneo); [Compagno, 1988]: 319, 321, 327 (Vietnam, Borneo, and Thailand); [Compagno et al., 1998]: 1359, fig (Vietnam, Borneo, and Thailand)

Carcharhinus porosus: [Compagno et al., 2005]: 71 (Borneo, Saigon, and Bangkok)

Carcharhinus undescribed small species: [Compagno, 1984]: 497 (Borneo, Vietnam, and Thailand)

Carcharhinus sp. (= ‘Carcharhinus porosus’): [Compagno et al., 1998]: 1322.

Carcharhinus sp. A: [Compagno et al., 2005]: 307, fig, pl. 62 (Borneo, Vietnam, and Thailand); [Voigt et al., 2011]: 103, fig 50

Holotype: NMW 61463, female 433 mm TL, Bangkok, Thailand, no date or collector recorded.

Paratypes: ANSP 76859, female late-term embryo 339 mm TL, Ho Chi Minh City, Vietnam, Dec. 1934, coll. H. Rutherfurd; ANSP 77121 (paratype of Carcharhinus tephrodes Fowler), female 370 mm TL, Baram, Sarawak, Malaysian Borneo, 1897, coll. A.C. Harrison Jr. & H.M. Hiller.

Diagnosis.: A small species of Carcharhinus with: a slender body and tail; no interdorsal ridge; head parabolic in dorsal view, relatively wide, interorbital space 11.2–12.0% TL; eyes relatively large, length 2.4–2.9% TL, 10.0–15.1 times in head length; no row of enlarged hyomandibular pores alongside each mouth corner; upper anterior teeth broadly triangular and serrated, with large and coarse (non-lobate) serrations basally; lower anterior teeth with narrower, mostly straight cusps; cusps of upper and lower anterolateral teeth with apical margin slightly recurved; no lateral cusplets; total tooth row counts 27–31/26–29; posterior edge of the mandibular plate with an elongate and crescentic indentation; second dorsal-fin origin well posterior of anal-fin origin, about opposite anal-fin midbase, second dorsal-fin origin to anal-fin origin 1.3–2.5% TL, 0.3–0.6 times second dorsal-fin base; first dorsal fin triangular, not falcate, origin about opposite first third of pectoral-fin inner margin length, free rear tip just anterior to pelvic-fin origins, length 1.7–1.9 times height, inner margin 1.9–2.5 in base; second dorsal fin much smaller than first, slightly smaller than anal fin; base 1.4–2.0 times height; height 22–31% of first dorsal-fin height; anal fin height 1.2–1.5 times second dorsal height, base 1.1–1.2 times second dorsal-fin base; total vertebral counts 114–120, monospondylous precaudal counts 36–40, diplospondylous precaudal counts 18–19, diplospondylous caudal counts 56–66, precaudal counts 54–58; no distinct black markings on fins.

....

Distribution: Uncertain; collection records indicate southern South China Sea (Gulf of Thailand, Vietnam, Malaysian Borneo).

The distribution of Carcharhinus obsolerus is uncertain. Given that this species has not been seen in many decades, a better understanding of the distribution of this species is unlikely unless archaeological or paleontological records are found. While Baram in Sarawak is likely an accurate collection locality, both Bangkok and Ho Chi Minh City specimens may have been caught in other South-east Asian locations and brought into these cities where bigger markets exist. Thus, there is a possibility it had a much more restricted distribution than the three known specimens allude to, but it cannot be ruled out that it had a wider distribution in the South-east Asian region.

Etymology: The specific name is Latin for ‘extinct’ (obsolerus) in allusion to the fact that the species has not been recorded in many decades. Proposed English vernacular name: Lost Shark.

William T. White, Peter M. Kyne and Mark Harris. 2019. Lost before Found: A New Species of Whaler Shark Carcharhinus obsolerus from the Western Central Pacific known only from Historic Records. PLoS ONE. 14(1): e0209387. DOI: 10.1371/journal.pone.0209387  

twitter.com/WillWhitesharks/status/1080544017845112832

        

---------------------------------------------------------------

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.