Bathygadus garretti Gilbert and Hubbs 1916
Creators: name: Iwamoto, Tomio
name: Nakayama, Naohide
name: Shao, Kwang-Tsao
name: Table, Hsuan-Ching Ho
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Gadiformes
Macrouridae
Bathygadus
Bathygadus garretti

description: Bathygadus garretti Gilbert and Hubbs, 1916
Bathygadus garretti Gilbert and Hubbs, 1916:151–153, pl.8, fig. 1 (holotype USNM 76863, 513 TL, Suruga Gulf, Japan, Albatross sta. 5059, 197–297 fm [360–543 m]).
Bathygadus (Melanobranchus) garretti: Gilbert and Hubbs, 1920:380 (in key).
Bathygadus garretti: Okamura, 1970:34–36, pl. 12, text-fig. 17 (descr. based on paratype, USNM 135351); Okamura, 1984:197, 357, fig. 139 (descr. in Japanese and English; 7 spec., Okinawa Trough, 360–650 m).— Chiou et al., 2004b:42, fig. 6 (1 spec., Da-xi, NET).— Shao et al., 2008: table 2 (6 spec., NET, SWT, SCS).
Bathygadus nipponicus: Howes and Crimmen, 1990:191 (in part; synonymized B. garretti with B. nipponicus). Chiou et al., 2004b:42, fig. 7 (1 spec., NET).
MATERIAL EXAMINED (20 spec.).— NET: ASIZP 61226 (1, 86.5 HL, 446 TL); Da-xi; ASIZP 61227 (2, 70–77 HL, 362–380 TL); Da-xi; ASIZP 61228 (1, 96.8 HL, 458 TL); Da-xi, ASIZP 64274 (1, 91.3 HL, 365 TL); CP 235, 764 m; ASIZP 70241 (1, 281 TL); Da-xi; ASIZP 70244 (1, 153 TL); Da-xi; ASIZP 70246 (3, 127–175 TL); Da-xi; ASIZP 70249 (3, 360–456 TL); Da-xi; ASIZP 70253 (1, 444 TL); Da-xi. SWT: ASIZP 65512 (1, 58.1 HL, 320 TL); CP 130, 709– 728 m; ASIZP 65593 (1, 70 HL, 338 TL); CD 140, 280– 452 m; ASIZP 65599 (1, 65.6 HL, 291+ TL); CD 137, 316– 477 m. No data: ASIZP 65580 (1, 71.6 HL, 335+ TL). Other material: Japan: BSKU 98225 (1, 62.5 HL, 305+ TL) and BSKU 98224 (1, 58.9 HL, 320 TL); Suruga Bay, 520–545 m; 23 Nov. 1978.
DISTINGUISHING FEATURES.— A species of Bathygadus with gular membrane scaled; a rudimentary chin barbel usually present (sometimes absent); dorsal profile behind head relatively low, nape not humpbacked; 1D II8–10; P i15–i18; V 10 (rarely 11); GR-I (5–6) + (17–20); pyl. caeca 34–46 (or more); interorbital width 27–32% HL; orbit diameter 21–26%; upper jaw length 52–58%; none of fins with greatly elongated rays.
DISTRIBUTION.— Southern Japan s. to Taiwan (NET, SWT) in 360–650 m.
REMARKS.— Our identification of specimens of this species was based on a combination of characters, including the presence of a rudimentary chin barbel. In a few specimens, the barbel was not present, but other characters that we deemed important appeared to confirm our identification. Howes and Crimmen (1990:1910) synonymized B. garretti with B. nipponicus, stating that the only difference between the two was the presence of a rudimentary chin barbel in the former, a suggestion made earlier by Okamura (1984:358). However, our ASIZ specimens suggest that B. garretti almost always has V 10 (11 on one side in a paratype) vs. mostly 9 in B. nipponicus (the holotype has 10, fide Okamura 1970 and Howes and Crimmen 1990, not 9 as stated in the original description), a slightly larger orbit (1–26% HL vs. 17–22%), and more pyloric caeca (34–46 [5 spec.] vs. 12–19 [5 spec.]). The count of pyloric caeca in the single paratype of B. garretti was given as 50 by Gilbert and Hubbs (1916:152), 49 by Okamura (1970:34), and 54 by Howes and Crimmen (1990:191).
Specimen ASIZP 61227, listed in Chiou et al. (2004b) as the first Taiwan record of B. nipponicus, was determined by us to be B. garretti. One of two specimens of B. antrodes (ASIZP 61226) recorded in the same paper is now re-identified as this species.
description: Published as part of Iwamoto, Tomio, Nakayama, Naohide, Shao, Kwang-Tsao & Table, Hsuan-Ching Ho, 2015, Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan, pp. 31-126 in Proceedings of the California Academy of Sciences 62 (3) on pages 39-40, DOI: 10.5281/zenodo.11512126