أشلاق (القروش و الشفانين) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Pentanchus: penta, from pente (Gr.), five; -anchus, perhaps an abridgement of branchos (Gr.), gill, referring to five pairs of branchial apertures (gill slits), unique among the group of sharks (hexanchoid) in which the authors erroneously believed this shark belonged. (See ETYFish); profundicolus: profundus (L.), deep; -colus (L.), dwelling in, referring to deepwater habitat (holotype taken at 1070 m). (See ETYFish).
More on authors: Smith & Radcliffe.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري قاعية المعيشة; نطاق العمق 673 - 1069 m (Ref. 47206). Deep-water; 12°N - 8°N
Western Central Pacific: known from the holotype and only specimen taken from the Mindanao Sea, Philippines. Upon comparing, the holotypes of Apristurus herklotsi and this species are conspecific, thus, suggesting that Pentanchus is a senior synonym of Apristurus. But due to lack of verifiable specimens, herklotsi is tentatively retained in Apristurus.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 51.0 cm TL ذكر/ مختلط الجنس; (Ref. 244)
الأشواك الظهرية (المجموع) : 0; شوكة شرجية: 0. Only shark with 5 pairs of gill slits and one dorsal fin (Ref. 244). Head broadly flattened and spatulate, snout elongated and usually longer than mouth width. Labial furrows very long, uppers reaching upper symphysis (Ref. 244). No color pattern, uniformly dark brown (Ref. 244). Caudal fin with a distinct subterminal notch.
A poorly known deep-water bottom-dwelling shark inhabiting insular slopes (Ref. 11146). Possibly oviparous (Ref. 50449).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Nakaya, K. and B. Séret, 2000. Re-description and taxonomy of Pentachus profundicolus Smith & Radcliffe, based on a second specimen from the Philippines (Chondrichthyes, Carcharhiniformes, Scyliorhinidae). Ichthyol. Res. 47(4):373-378. (Ref. 47206)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: غير ذات اهمية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00176 - 0.00714), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.1 ±0.6 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (40 of 100).
