Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan
Author
Iwamoto, Tomio
Section of Ichthyology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118, USA;
Author
Nakayama, Naohide
Laboratory of Marine Biology, Faculty of Science, Kochi University, 2 - 5 - 1 Akebono-cho, Kochi, 780 - 8073, Japan;
Author
Shao, Kwang-Tsao
Research Center for Biodiversity, Academia Sinica No. 128, Sec. 2, Academia Road, Nankang, Taipei 115, Taiwan;
Author
Table, Hsuan-Ching Ho
text
Proceedings of the California Academy of Sciences
2015
2015-04-15
62
3
31
126
journal article
299670
10.5281/zenodo.11512126
522b8de7-880d-40ca-803e-aa5a3a05c5f6
0068-547X
11512126
Coelorinchus
cf.
macrorhynchus
[
sensu
Smith and
Radcliffe, 1912
]
Figure 8.
MATERIAL
EXAMINED
.—
SWT
:
ASIZP 65531
(1, 73.0 mm HL,
222 mm
TL), CD
138, 441 m
.
Distinguishing feature
.— 1D II 9; P i18–i19; GR-I (inner) 2+6, GR-II (outer/inner) 0+6 / 1+7; scales below midbase 1D 4.5, below 2D 6.5, lateral-line scales over distance equal to pre-D length 47. Snout sharply pointed, slender and spear-shaped in dorsal view, length 51% HL; anterolateral margin of snout completely supported by bone; orbit 23% HL,
2.2 in
snout length, upper jaw 23% HL; nasal fossa densely scaled anteriorly and ventrally; underside of head almost fully scaled (scales with 1–3 short rows of spinules). Light organ group II of
Iwamoto (1990)
, fossa narrow and short, not extending to pelvic-fin bases. Anus separated from A origin by 2 or 3 scale rows. Spinules on body scales blade-like in 3–6 sharp, divergent, ridgelike rows, closely overlapping, with height increasing abruptly with posteriormost spinule much larger than anterior ones. Ground color brownish (somewhat faded), bluish over abdomen but not on chest; mouth and gill cavity dark; most fins dark dusky to blackish. Attains more than
44 mm
TL.
DISTRIBUTION
.—
Broadly
distributed from
Philippines
to e. and w. coasts of
Australia
, in
485–1107 m
.
In
Taiwan
, the single specimen was collected in
441 m
.
REMARKS
.— This single juvenile was captured in the same haul as
two specimens
(
ASIZP
65523, 250–
265 mm
TL) that we identified as
C. smithi
.
It differed from those specimens in having a more slender and longer snout (orbit 2.2 into snout, cf. 1.3–
2.1 in
C. smithi
), slightly narrower internasal and interorbital widths (16% HL and 18% HL, respectively, cf. 17–19% and 19–23% in
C. smithi
) and the nasal fossa was almost fully covered with small scales antero-ventrally (naked to sparsely covered in
C. smithi
). The differences are so slight that we are uncertain whether they simply represent individual variation; thus, our identification must be considered as tentative. The presence of this species in
Taiwan
waters should not be surprising, however, as it was originally described from captures in the
Philippines
in the Verde Island Passage off sw. Luzon. If confirmed, this specimen represents the first record of the species from
Taiwan
.