Longfin Catshark

description

Isurus oxyrinchus Taiwan Pacific Ocean GN 939 100 Isurus oxyrinchus Mexico Pacific Ocean GN 1126 93 Isurus oxyrinchus Vietnam Pacific Ocean GN 7069 100 Isurus oxyrinchus U. S. A. Atlantic Ocean GN 16 98 Isurus oxyrinchus U. S. A. Atlantic Ocean GN 241 65 Isurus oxyrinchus U. S. A. Pacific Ocean GN 1036 76 IsurusIsurus oxyrinchusoxyrinchus TaiwanTaiwan KeelungKeelung FishmarketFishmarket GN 10186 100 Pseudocarcharias kamoharai U. S. A. Pacific Ocean GN 2000 100 PseudocarchariasPseudocarcharias kamoharaikamoharai GN 10263 HO 20110526 tsHO 20110526 ts 100 Pseudocarcharias kamoharai Taiwan Pacific Ocean GN 1034 90 Pseudocarcharias kamoharai U. S. A. Pacific Ocean GN 2634 85 Pseudocarcharias kamoharai Taiwan Pacific Ocean GN 1033 92 Alopias pelagicus Taiwan Pacific Ocean GN 1074 80 Alopias pelagicus Mexico Pacific Ocean GN 5402 98 Alopias pelagicus Mexico Atlantic Ocean GN 3130 100 Alopias pelagicus Taiwan Pacific Ocean GN 924 88 Alopias pelagicus Taiwan Pacific Ocean GN 927 97 Alopias pelagicus India Indian Ocean GN 1642 65 AlopiasAlopias pelagicuspelagicus GN 10065 10065 HOHO 178178 0.05

A DNA sequence-based identification checklist for Taiwanese chondrichthyans

description

Apristurus herklotsi: Springer & Garrick, 1964: 86 (material, Philippines); Compagno, 1984: 264 (description, Philippines); Compagno, 1988: 170 (taxonomic comments, Philippines); Nakaya, 1988 a: 437 (comparative materials); Nakaya, 1988 b: 133, figs. 1 – 12 (description, Philippines and Japan); Nakaya, 1991: 999, figs. 1 – 8 (comparative materials, Philippines, China, and Japan); Nakaya & Shirai, 1992: 40 (fauna and zoogeography, Japan); Compagno, 1999: 478 (list); Nakaya & Sato, 1999: 315 (taxonomic comments); Nakaya & Séret, 1999: 307 (comparative materials); Yoshino & Aonuma, 2002: 130 (key to species, Japan); Compagno et al., 2005: 190 (not fig., not pl. 32, description, China, Philippines, and Japan); Ebert et al., 2013: 289 (not fig, not pl. 39, description). Apristurus xenolepis Meng, Chu and Li, 1985: 47, fig. 4 (original description, type locality: China). Apristurus abbreviatus Deng, Xiong & Zhan, 1985: 102, fig. 1 (original description, type locality: China). Apristurus brevicaudatus Chu, Meng & Li, 1986: 269, fig. 1 (original description, type locality: China). Apristurus longianalis Chu, Meng & Li, 1986: 271, fig. 3 (original description, type locality: China). Apristu

A review of the genus Apristurus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Taiwanese waters

description

Description. Proportional measurements and meristic counts are given in Table 1. Body cylindrical, slender and elongate (Figure 1). Head dorso-ventrally flattened, posterior part of body compressed laterally. Snout very long, narrow; its tip tapering evenly. Pre-outer nostril length greater than interorbital width, 2.0 – 2.5 times internarial width. Pre-oral length slightly less than pre-orbital length, 3.1 – 4.0 times internarial width, much greater than mouth width and interorbital width. Pre-orbital length 1.9 – 2.1 times interorbital length, 3.4 – 4.9 times orbit length. Internarial width longer than orbit length and subequal to nostril width. Nostril relatively large, expanding obliquely inward from snout edge; length about half of pre-outer nostril length. Nostril-mouth space about half of internarial width. Mouth arched, with well developed labial furrows; upper labial furrow 1.0 – 1.6 times longer than lower one. Upper labial furrow reaching beyond midpoint between mouth corner and posterior margin of nostril. Orbit narrow and slender, with a weak subocular fold. Spiracle small placed slightly below level of horizontal axis of orbit. Five small gill slits present; fourth gi

A review of the genus Apristurus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Taiwanese waters

diagnosis

Diagnosis. A species of Apristurus with the following characters: upper labial furrows subequal to or longer than the lowers; first dorsal fin much smaller than second dorsal fin, originating slightly posterior to pelvic fin insertion; second dorsal-fin insertion anterior to anal-fin insertion; snout narrow and long; pre-outer nostril length greater than interorbital width; abdomen short; P 1 – P 2 space much shorter than anal-fin base length (ceratotrichia); pectoral-fin tip always extending beyond midpoint of P 1 – P 2 space; duodenum short, less than half of valvular intestine; intestinal spiral valves 8 – 12; monospondylous + precaudal diplospondylous vertebrae 28 - 33 + 31 – 35; clasper hook present on edge of exorhipidion; body uniformly pale brownish to light grayish; mature size 400 – 450 mm TL in males and 550 – 600 mm TL in females.

A review of the genus Apristurus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Taiwanese waters