Ventrifossa rhipidodorsalis Okamura, 1984

Iwamoto, Tomio, Nakayama, Naohide, Shao, Kwang-Tsao & Table, Hsuan-Ching Ho, 2015, Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan, Proceedings of the California Academy of Sciences 62 (3), pp. 31-126 : 115-116

publication ID

https://doi.org/ 10.5281/zenodo.11512126

DOI

https://doi.org/10.5281/zenodo.12715593

persistent identifier

https://treatment.plazi.org/id/039F87BD-FF8E-110B-AB64-E15DFB18FD19

treatment provided by

Felipe

scientific name

Ventrifossa rhipidodorsalis Okamura, 1984
status

 

Ventrifossa rhipidodorsalis Okamura, 1984 View in CoL

Ventrifossa rhipidodorsalis Okamura View in CoL in Okamura and Kitajima, 1984:205 (Okinawa Trough, 28°42.0ʹN, 127°09.0ʹE, 500–535 m (holotype, BSKU 27695; 23 paratypes, Okinawa Trough and Tosa Bay, 500–650 m [but 1 spec. at 220 m]).— Okamura in Masuda et al., 1984:94 (compiled).— Iwamoto and Williams, 1999:228 (mentioned).— Chiou et al., 2004b:48, fig.22 (13 spec.; Nanfangao, Taiwan [ NET]).

? Ventrifossa nigrodorsalis View in CoL : Okamura in Okamura et al., 1982:147, 348, fig. 90 (2 spec.; BSKU 29495 View Materials , later identified as V. rhipidodorsalis View in CoL by Okamura in Okamura and Kitajima, 1984: fig. 146C) .

MATERIAL EXAMINED (70 Taiwan spec.).— NET: ASIZP 61246 (1, 170 TL), Nan-fang-ao; ASIZP 61247 View Materials (12, 142–168 TL), Nan-fang-ao ; ASIZP 62331 View Materials (2, 126+-162+ TL), Fong-kang , 200 m ; ASIZP 64236 View Materials (3, 110+-215 TL) and CAS 224885 About CAS (ex. ASIZP 64236 View Materials ) (2, 121+~161 TL), CP 234, 547 m ; ASIZP 65549 View Materials (1, 160+ TL), CP 124, 1129–1165 m ; ASIZP 70231 View Materials (2, 109–113 TL), Da-xi ; ASIZP 70248 View Materials (9, 98–180 TL), Nan-fang-ao ; ASIZP 70250 View Materials (1, 125 TL), Da-xi ; ASIZP 70685 View Materials (1, 40 HL), Da-xi ; ASIZP 70733 View Materials (1, 196 TL), Da-xi . SWT: ASIZP 62388 View Materials (1, 181 TL), Dong-gang , 300 m ; ASIZP 66322 View Materials (1, 153 TL), Dong-gang . SCS: ASIZP 65521 View Materials (11, 100–142 TL) and ASIZP 65592 View Materials (18, 105–165 TL), CD 136, 998– 1211 m ; ASIZP 65588 View Materials (3, 140–155 TL), CD 141, 985– 1110 m . SET: ASIZP 66104 View Materials (1, 65 HL, 285+ TL), CP 299, 799 m. Other specimens: BSKU 27695 View Materials (holotype) and six paratypes , BSKU 27123 View Materials , 27191 View Materials , 27660 View Materials , 27696 View Materials , 27861 View Materials , 27865 View Materials , Okinawa Trough . CAS 88668 About CAS (5, 51.6–58.7 HL, 233+-312+ TL), Philippines, off se coast Luzon ; 14˚50.46ʹN, 123˚17.30ʹE, 760–770 m ; R / V Fishery Researcher I sta. TFRI-Ph1–12–95, 27 Sep. 1995 .

DISTINGUISHING FEATURES.— 1D II,10–12; P i19–i23; V 9–10; total GR-I (lateral/mesial) 10–13/15–17 total, (lateral/mesial) GR-II 14–17/(13)15–17; scale rows below midbase 1D 5.5–7.5, below 2D 7–8.5; lateral line scales over distance equal to predorsal length 36–43. Snout length 25–32% HL; preoral length 11–15%; internasal 18–23%; interorbital 21–27%; orbit 26–34%; postorbital 42–48%; orbit to preopercle (38) 41–44%; suborbital 11–14%; upper jaw (39) 42–47%; barbel (16) 19–26%; outer gill slit 22–28%; 1D-2D interspace 45–62%. Body moderately deep and compressed; snout low, blunt in adults, somewhat more pointed and protruding in young; suborbital area gently rounded. Body scales covered with small, slender, needle-like spinules in wide chevron-like rows; an area of spinuleless scales along and behind 1D base. Color in alcohol overall dark, with faint silvery reflections along sides of head and trunk; bluish-black over abdomen and chest; gill cover and gill membranes mostly black; mouth and gill cavities pale, but dark in gullet; black margins on suborbital shelf, leading edge of snout, suparnarial ridges, and a V-shaped stripe joined at apex to black nape stripe before 1D; 1D black except distal third or less white, base dusky to pale; V black, P dusky but base black with bulk of lateral face of base silvery, A dark dusky overall but with narrow black distal margin anteriorly. Lips, mouth, jaws, and gill cavity as in others of genus. Attains about 33 cm TL.

DISTRIBUTION.— From s. Japan to sw. Taiwan ( SCS) in 400–1211 m.

REMARKS.— Among the Taiwanese grenadiers, V. rhipidodorsalis is most similar to V. nigrodorsalis , but that species has 8 or 9 V rays (cf. 9 or 10), overall paler coloration; paler, more silvery sides; slightly sharper, more protruding snout; generally narrower black streak on 1D; and shorter upper jaw (37–41% HL). In its overall dark color and V count of 9–10, it resembles V. macroptera , but that species has a smooth 1D spinous ray and differences in dentition. Another species with a black streak across the 1D is V. longibarbata , but that species has slightly lower average number of V rays (8–9), much longer barbel (28–39% HL cf. 19–26%), slightly longer preoral length (16–17% cf. 11–15%), and somewhat fewer scale rows below 2D (5.0–6.5 cf. 7.0–8.5).

BSKU

Kochi University

ASIZP

Academia Sinica Institute of Zoology, Ichthyology Collection

SWT

Southwest Texas State University

SCS

Agriculture and Agri-Food Canada

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Chordata

Order

Gadiformes

Family

Macrouridae

Genus

Ventrifossa

Loc

Ventrifossa rhipidodorsalis Okamura, 1984

Iwamoto, Tomio, Nakayama, Naohide, Shao, Kwang-Tsao & Table, Hsuan-Ching Ho 2015
2015
Loc

Ventrifossa nigrodorsalis

OKAMURA, O. & K. AMAOKA & AND F. & MITANI, EDS 1982: 147
1982
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