Dysommina rugosa Ginsburg, 1951

Ho, Hsuan-Ching, Smith, David G. & Tighe, Kenneth A., 2015, Review of the arrowtooth eel genera Dysomma and Dysommina in Taiwan, with the description of a new species (Anguilliformes: Synaphobranchidae: Ilyophinae), Zootaxa 4060 (1), pp. 86-104 : 100-101

Dysommina rugosa Ginsburg, 1951

Fig. 8 ; Table 3

Dysommina rugosa Ginsburg, 1951:450 (type locality: off Cumberland Island, Georgia, U.S.A., western North Atlantic, 30°53'00"N, 79°42'30"W, depth 273 fathoms [499 m]). Karrer, 1983:96. Robins & Robins, 1989:242. Smith, 1999:1661.

Specimens examined. Collected from Dong-sha Island, South China Sea: ASIZP 57954 (1 spec., 238 mm TL), 17 Aug. 1991. Collected from Dong-gang fishing port, SW Taiwan, bottom trawl: NMMB-P8361 (1, 258), 16 Mar. 2005. NMMB-P11131 (1, 413), 13 Sep. 2010. NMMB-P14012 (1, 316), 20 Oct. 2011. NSYU uncat. (2, twisted).

Other localities. Solomon Islands: MNHN 2006-0017 (1, 350), 8°16’26.4”S, 160°4’33.6”E, 23 Oct. 2004. MNHN 2006-0461 (1), 7°45'S, 156°28'22.8"E, 582–609 m, 1 Nov. 2004. MNHN 2006-0509 (1), 8°16'33.6"S, 160°4'33.6"E, 430 m, 23 Oct. 2004. Madagascar: MNHN 1979-0005 (1), 18°54’S, 43°55’1.2”E, 24 Nov. 1973. Philippines: MNHN 1998-0641 (1), 13°49’1.2”N, 120°49’58.8”E, 23 Nov. 1980. USNM 343985 (1, 362+), 12°54’29"N, 12°57’30”E, 376–382 m, 23 Sep. 1995. New Caledonia: MNHN 1995-0329 (1, 140), 22°6’S, 167°10’1.2”E, 550 m, 3 Oct. 1985. MNHN 2003-1529 (1, 198), 23°42’S, 168°15’E, 12 Aug. 1999.

Diagnosis. Pectoral fin present; dorsal-fin origin over tip of pectoral fin, predorsal length 14.0–17.1% TL; anus posterior, more than 1 head length behind pectoral fin, preanal length 26.8–28.8% TL; trunk long, trunk length 12.8–16.4% TL; no intermaxillary teeth; 4 compound teeth on vomer; multiple rows of teeth on upper jaw and lower jaw; head pores: IO 4, SO 3, M 6, POP 0, AD 1, ST 0, F 0; lateral-line pores absent; MVF 11-28-136, total vertebrae 133–141.

Body light brownish dorsally, paler ventrally; dorsal and anal fins with white margin, posterior one third of anal-fin base and posterior one-seventh of anal fin black.

Distribution. Widespread in tropical Atlantic and Indo-West Pacific Oceans. Specimens examined in present study were collected at depths of 376– 609 m.

Figures

FIGURE 8. Dysommina rugosa Ginsburg, 1951. NMMB-P 11131, 413 mm TL, collected from Dong-gang fishing port.