Blackedge Conger

discussion

Remarks. This is a common species collected by bottom trawl off northeastern and southwestern Taiwan, though not as abundant as B. wallacei.

Annotated checklist of eels (orders Anguilliformes and Saccopharyngiformes) from Taiwan

description

Description. Proportional measurements and meristics are provided in Tables 7 – 8. Body less elongate, rounded in cross section, becoming more compressed behind anus; head moderately slender, its depth and width slightly less than those of trunk; tip of tail tapering, attenuate, though not filiform; anus near anterior two-fifths of total length; body depth narrows relatively abruptly near posterior end. Dorsal fin begins over or slightly behind pectoral-fin base, continuous around tip of tail with caudal and anal fins. Anal fin begins immediately behind anus. Pectoral fin well developed. Gill opening relatively large, about same size as eye diameter, its upper end nearly opposite middle of pectoral-fin base; interbranchial broader than gill opening and eye. Head large, its length 15.7 – 18.6 % TL, deepest at about occiput, tapering anteriorly from this point; dorsal profile nearly flat from occiput to internasal space; snout moderately long and pointed, its length 1.7 – 2.1 times eye diameter, projecting beyond lower jaw; lower jaw longer than snout; fleshy part of snout with a slight median keel on underside, projecting anteriorly beyond anterior end of intermaxillary tooth patch;

The congrid eel genus Bathycongrus of Taiwan, with descriptions of three new species (Anguilliformes: Congridae)

description

Figs. 6 D, 10 A – C; Tables 1 – 3, 7 – 8 Leptocephalus retrotinctus Jordan & Snyder, 1901: 853, fig. 6 (type locality: Tokyo market, Japan).

The congrid eel genus Bathycongrus of Taiwan, with descriptions of three new species (Anguilliformes: Congridae)

diagnosis

Diagnosis. A moderately large and stout species of Bathycongrus with tail short, attenuate; trunk length 1.3 – 1.5 times head length; vomer with usually 2 enlarged teeth surrounded by small teeth; origin of dorsal fin above or slightly behind pectoral-fin base; preanal vertebrae 36 – 38, precaudal vertebrae 42 – 49, total vertebrae 143 – 151; and preanal lateral-line pores 30 – 35.

The congrid eel genus Bathycongrus of Taiwan, with descriptions of three new species (Anguilliformes: Congridae)