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Apristurus yangi
White, Mana & Naylor, 2017
Classification: Elasmobranchii Carcharhiniformes Pentanchidae
Reference of the original description
Description of a new species of deepwater catshark Apristurus yangi n.sp (Carcharhiniformes: Pentanchidae) from Papua New Guinea. Zootaxa, 4320(1), 25–40
Description of a new species of deepwater catshark Apristurus yangi n.sp (Carcharhiniformes: Pentanchidae) from Papua New Guinea. Zootaxa, 4320(1), 25–40
Images of types
Description :
Citation: Apristurus yangi White, Mana & Naylor, 2017: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2024
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Lateral view of Apristurus yangi n.sp.: (A) holotype ASIZ P0080718, adult female 437 mm TL; (B) paratype NTUM 11491, female 205 mm TL © White, Mana &Naylor, 2017
Lateral view of Apristurus yangi n.sp.: (A) holotype ASIZ P0080718, adult female 437 mm TL; (B) paratype NTUM 11491, female 205 mm TL © White, Mana &Naylor, 2017
Common names
Yang’s Longnose Catshark
Yang’s Longnose Catshark
Short Description
Original diagnose after WHITE, MANA & NAYLOR, 2017 [25693]: A long-snouted Apristurus with the following combination of characters: long and narrow head, head length 23.5–23.8% TL, interorbital space 5.8–6.7% TL; snout very elongate, preoral length 12.4–12.7% TL, preorbital length 12.6–12.9; mouth wide, its width 7.9–8.6% TL; pelvic–anal space 3.2–4.0% TL; anal fin relatively large, base length 14.9–15.4% TL; anal-fin posterior margin 11.0% TL; prepectoral length relatively long, about 22.3–23.5% TL; labial furrows long, not confined to mouth corners, uppers 3.7–3.8% TL; no enlarged denticles on upper or lower caudal fin; duodenum of intestine very short, 8 intestinal spiral valves; tip of snout blackish; 32–33 monospondylous centra; 38 precaudal-diplospondylous vertebrae; precaudal centra 70–71; females adult by 437 mm TL; egg case small (~5.9 cm long), with faint longitudinal striations.
Original diagnose after WHITE, MANA & NAYLOR, 2017 [25693]: A long-snouted Apristurus with the following combination of characters: long and narrow head, head length 23.5–23.8% TL, interorbital space 5.8–6.7% TL; snout very elongate, preoral length 12.4–12.7% TL, preorbital length 12.6–12.9; mouth wide, its width 7.9–8.6% TL; pelvic–anal space 3.2–4.0% TL; anal fin relatively large, base length 14.9–15.4% TL; anal-fin posterior margin 11.0% TL; prepectoral length relatively long, about 22.3–23.5% TL; labial furrows long, not confined to mouth corners, uppers 3.7–3.8% TL; no enlarged denticles on upper or lower caudal fin; duodenum of intestine very short, 8 intestinal spiral valves; tip of snout blackish; 32–33 monospondylous centra; 38 precaudal-diplospondylous vertebrae; precaudal centra 70–71; females adult by 437 mm TL; egg case small (~5.9 cm long), with faint longitudinal striations.
Distribution
off Kavieng, New Ireland and from the Vitiaz Strait in Morobe Province of Papua New Guinea (types) [25693]
off Kavieng, New Ireland and from the Vitiaz Strait in Morobe Province of Papua New Guinea (types) [25693]
Dentition
Tooth rows on upper jaw 67 (52), on lower jaw 59 (56). Teeth on upper jaw possessing 5 or 7 cusps, either 2– 1–2 or 3–1–3 arrangement; 3rd tooth from the symphysis with long central cusp, almost twice length of adjacent cusp; cusps becoming slightly posteriorly projecting from about 10th tooth from symphysis (posteriorly directing in anteriormost teeth also in smaller paratype). Teeth on lower jaw with 5–9 cusps, mostly 7 anteriorly; posteriormost teeth with numerous cusps in maple leaf-like outline (often with 9 cusps), its central cusp not conspicuously elongated. Number of tooth cusps on lower jaw usually more than those on upper jaw when compared at same position. [25693]
Tooth rows on upper jaw 67 (52), on lower jaw 59 (56). Teeth on upper jaw possessing 5 or 7 cusps, either 2– 1–2 or 3–1–3 arrangement; 3rd tooth from the symphysis with long central cusp, almost twice length of adjacent cusp; cusps becoming slightly posteriorly projecting from about 10th tooth from symphysis (posteriorly directing in anteriormost teeth also in smaller paratype). Teeth on lower jaw with 5–9 cusps, mostly 7 anteriorly; posteriormost teeth with numerous cusps in maple leaf-like outline (often with 9 cusps), its central cusp not conspicuously elongated. Number of tooth cusps on lower jaw usually more than those on upper jaw when compared at same position. [25693]
Remarks
shark-references Species-ID=14942;
shark-references Species-ID=14942;
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