Pachycara brachycephalum

• Main Author: M. Eric Anderson
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Perciformes; Zoarcidae; Pachycara; Pachycara brachycephalum; Davis Sea; Ross Sea; South Orkney Islands; South Shetland Islands; Weddell Sea
• Online Access: https://doi.org/10.5281/zenodo.6258169; http://treatment.plazi.org/id/39F32B67664054126E29F57FC5562F4D

Pachycara brachycephalum (Pappenheim, 1912) Lycodes brachycephalus Pappenheim, 1912: 179, pl. X, fig. 3 (type locality: Davis Sea). Austrolycichthys brachycephalus: Regan, 1913: 244, fig. 2; Norman, 1938: 81, 83. Pachycara brachycephalus: Anderson, 1988: 74, fig. 16. Pachycara brachycephalum: Anderson, 1990b: 274, fig. 22. Material examined. Weddell Sea: MNHN 1990-635 (1 specimen; 210 mm SL), 72°55.0'S, 19°49'W, 617 m, POLARSTERN sta. 269, Feb. 1989, W. Arntz. ISH 9/91 (1; 150 mm SL), 72°53.3'S, 19°34.7'W, 481 m, POLARSTERN, ANT V/3, 20 Oct. 1986, W. Ekau. ISH 16/91 (2; 105-251 mm SL), 72°51.4'S, 19°41.4'W, 460 m, POLARSTERN, ANT V/3, 8 Nov. 1986, W. Ekau. South Orkney Islands: USNM 356658 (3 specimens; 230-311 mm SL), 60°45.5'S, 48°13.5'W, 2511-2542 m, ISLAS ORCADAS coll. UMO 116, 18 Feb. 1976, H. H. DeWitt. South Shetland Islands: SAM 34531 (5; 250-354 mm SL), 61°42.0'S, 55°05.9'W, 2227-2234 m, POLARSTERN sta. AGT 111, 14 Dec. 1996, K.-H. Kock Ross Sea: RUSI 54819 (3; 210-240 mm SL), 72°59.8'S, 175°08.6'E, 360 m, N.B. PALMER 96-6, 18 Dec. 1996, J. T. Eastman. RUSI 54821 (3; 205-217 mm SL), 75°30.1'S, 174°56.8'E, 300 m, N. B. PALMER 96-6, 3 Jan. 1997, J. T. Eastman. RUSI 54825 (32; 184-253 mm SL), 77°59.0'S, 177°58.9'E, N. B. PALMER 96-6, 24 Dec. 1996, J. T. Eastman. Diagnosis. Pachycara brachycephalum is distinguished from its congeners by the following combination of characters: pelvic fins present or (rarely) absent; branchiostegal rays 6; no occipital pores; lateral line with ventral and mediolateral branches, ventral originating behind posteriormost postorbital pore, mediolateral originating on vertical through pectoral fin margin or somewhat anterior to margin when fin appressed; gill rakers blunt and triangular except in specimens over about 320 mm SL; vertebrae 20-27 + 71-86 = 92-113. Remarks. This species was thoroughly redescribed on the basis of 76 specimens, including four syntypes, by Anderson (1988). All of these possessed the typical, rudimentary pelvic fins of most zoarcids. The new Weddell and ...