Lycodapus pachysoma Peden and Anderson 1978
- Dataset
- Studies on the Zoarcidae of the southern hemisphere. X. New records from western Antarctica.
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Chordata
- order
- Perciformes
- family
- Zoarcidae
- genus
- Lycodapus
- species
- Lycodapus pachysoma
description
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 %.
diagnosis
Diagnosis. Lycodapus pachysoma 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.
distribution
Remarks. Trunov (1999) reported this species from the Maud Rise, Lazarev Sea.
materials_examined
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. 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. 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. KEH 94 - RMT 31, midwater trawl, 8 Nov. 1994, K. E. Hartel. MCZ 126859 (1; 52 mm SL), 62 ° 17 ' S, 57 ° 50 ' W, 0 - 1000 m (bottom depth 1978 - 1986 m), POLAR DUKE sta. KEH 94 - RMT 30, midwater trawl, 8 Nov. 1994, K. E. Hartel.