Elasmobranchi (squali e razze) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Apristurus: a-, Latin privative, i.e., without; pristis, from pristes (Gr.), sawyer (but here meaning saw); oura (Gr.), tail, referring to absence of saw-toothed crest of enlarged dermal denticles along upper edge of caudal fin as found in the closely related Pristiurus (=Galeus) (See ETYFish); yangi: In honor of Lei Yang, College of Charleston (Charleston, South Carolina, USA), whose molecular phylogenetic work on sharks and rays has improved our understanding of their alpha taxonomy and phylogenetic relationships (See ETYFish).
Eponymy: Dr Lei Yang (d: 1980) has carried out extensive molecular phylogenetic work on sharks and rays. [...] (Ref. 128868), visit book page.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino batidemersale; distribuzione batimetrica 630 - 786 m (Ref. 116167). Tropical
Western Central Pacific: Papua New Guinea.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 43.7 cm TL (female)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
This long-snouted species is distinguished by the following set of characters: head long and narrow, head length 23.5-23.8% TL; interorbital space 5.8-6.7% TL; very elongate snout, preoral length 12.4-12.7% TL; preorbital length 12.6-12.9% TL; wide mouth, its width 7.9-8.6% TL; pelvic-anal space 3.2-4.0% TL; anal fin is relatively large, base length 14.9-15.4% TL; anal-fin posterior margin 11.0% TL; prepectoral length is relatively long, about 22.3-23.5% TL; labial furrows long and not confined to mouth corners, uppers 3.7-3.8% TL; absence of 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 mature to adult by 43.7 cm TL; egg case is small (about 5.9 cm long), with faint longitudinal striations (Ref. 116167).
Body shape (shape guide): elongated; Cross section: angular.
The pregnant female individual caught contained a single egg capsule (Ref. 116167).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
White, W.T., R.R. Mana and G.J.P. Naylor, 2017. Description of a new species of deepwater catshark Apristurus yangi n. sp. (Carcharhiniformes: Pentanchidae) from Papua New Guinea. Zootaxa 4320(1):025-040. (Ref. 116167)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00347 (0.00171 - 0.00701), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Livello trofico (Fonte Biblio. 69278) |
3.9 ±0.6 se; based on size and trophs of closest relatives |
Resilienza (Fonte Biblio. 120179) |
Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.). |
Vulnerabilità della pesca (Ref. 59153) |
Low to moderate vulnerability (26 of 100). 🛈 |