Lycodapus pachysoma Peden and Anderson, 1978

M. Eric Anderson, 2006, Studies on the Zoarcidae of the southern hemisphere. X. New records from western Antarctica., Zootaxa 1110, pp. 1-15: 8-9

publication ID

z01110p001

persistent identifier

http://treatment.plazi.org/id/A303DE05-25F6-FC13-8457-DD323B6E4619

treatment provided by

Thomas

scientific name

Lycodapus pachysoma Peden and Anderson, 1978
status

 

Lycodapus pachysoma Peden and Anderson, 1978  ZBK 

Lycodapus pachysoma Peden and Anderson, 1978  ZBK  : 1944, figs. 5, 9, 16 ( type locality: off Oregon , USA  ); Anderson, 1988: 106, fig. 41; Anderson, 1990b: 266, fig. 12; Trunov, 1999: 492; Mecklenburg et al., 2002: 735, text fig.

Material examined. Scotia Sea: USNM 356649 (1 specimen; 197 mm SL), off Candelmas Isl. , 56°58.7'S, 26°30.6'W, 1681-1655 m, ISLAS ORCADAS coll. UMO 37, 10 ft beam trawl, 22 May 1975, H. H. DeWitt.GoogleMaps  Weddell Sea: MNHN 1990-646 (1; 102 mm SL); Halley Bay , 74°30.0'S, 29°20.0'W, 0-1223 m, POLARSTERN sta. 252, Agassiz beam trawl, 6 Feb. 1989, W. Arntz.GoogleMaps  South Shetland Islands: MCZ 123478 (1; 191 mm SL), 62°17'S, 57°26'W, 0-1000 m (bottom depth 1975-1998 m) , POLAR DUKE sta. KEH94- RMT31, midwater trawl, 8 Nov. 1994, K. E. Hartel.GoogleMaps  MCZ 126859 (1; 52 mm SL), 62°17'S, 57°50'W, 0-1000 m (bottom depth 1978-1986 m) , POLAR DUKE sta. KEH94-RMT30, midwater trawl, 8 Nov. 1994, K. E. Hartel.GoogleMaps 

Diagnosis. Lycodapus pachysoma  ZBK  is distinguished from its congeners by the following combination of characters: vertebrae 16-18 + 59-65 = 75-82; gill raker ratio as percent 50-88; adults with relatively robust bodies and long heads.

Description. Complete descriptions found in Peden and Anderson (1978) and Anderson (1988). Vertebrae 17-18 + 60-62 = 77-80; D 70-72; A 61-62; P 7-8; C 9; pelvics absent; branchiostegal rays 6; gill rakers 13 + 11-12 = 12-15; vomerine teeth 3-17; palatine teeth 7-17; pseudobranch filaments 1-3; pyloric caeca 2; preopercular pores 4; mandibular pores 4; interorbital pore 1. Following proportions as percent SL: head length 20.1-22.2; head width 8.3-9.1; head depth 11.7-12.6; predorsal length 24.1-26.2; preanal length 40.9-42.8; body depth 7.1-8.6. Following proportions as percent HL: upper jaw length 50.2-51.6; eye diameter 12.1-15.9 (21.9 in 52 mm juvenile); snout length 35.3-37.9; pectoral-fin length 19.6-23.8. Gill raker ratio 59-65%.

Remarks. Trunov (1999) reported this species from the Maud Rise, Lazarev Sea.