A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae)

Naohide Nakayama; Hiromitsu Endo; Werner Schwarzhans

doi:10.1007/s10228-015-0464-9

A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae)

Naohide Nakayama^*, Hiromitsu Endo, Werner Schwarzhans

^*Corresponding author for this work

Abstract

Hymenocephalus yamasakiorum, a new species of grenadier fishes, is described from a single specimen collected from Tosa Bay off Aki, Kochi, Japan, at a depth of 320–400 m. The species is distinguished from its 26 known congeners in having the following combination of features: pelvic-fin rays nine; pectoral-fin rays i16–i17; first dorsal-fin rays II, 10; chin barbel 55 % of head length (HL), its tip extending beyond the hind margin of orbit when laid back; snout moderately high, not depressed, length 28 % HL; orbit diameter 33 % HL; interorbital width 24 % HL; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; dorsal half of posterior part of tail prominently blackish.

Original language	English
Journal	Ichthyological Research
Volume	62
Issue number	4
Pages (from-to)	504-511
Number of pages	8
ISSN	1341-8998
DOIs	https://doi.org/10.1007/s10228-015-0464-9
Publication status	Published - 2015

Keywords

Kochi
New species
Northwestern Pacific
Otoliths

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title = "A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae)",

abstract = "Hymenocephalus yamasakiorum, a new species of grenadier fishes, is described from a single specimen collected from Tosa Bay off Aki, Kochi, Japan, at a depth of 320–400 m. The species is distinguished from its 26 known congeners in having the following combination of features: pelvic-fin rays nine; pectoral-fin rays i16–i17; first dorsal-fin rays II, 10; chin barbel 55 % of head length (HL), its tip extending beyond the hind margin of orbit when laid back; snout moderately high, not depressed, length 28 % HL; orbit diameter 33 % HL; interorbital width 24 % HL; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; dorsal half of posterior part of tail prominently blackish.",

keywords = "Kochi, New species, Northwestern Pacific, Otoliths",

author = "Naohide Nakayama and Hiromitsu Endo and Werner Schwarzhans",

year = "2015",

doi = "10.1007/s10228-015-0464-9",

language = "English",

volume = "62",

pages = "504--511",

journal = "Ichthyological Research",

issn = "1341-8998",

publisher = "Springer",

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TY - JOUR

T1 - A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae)

AU - Nakayama, Naohide

AU - Endo, Hiromitsu

AU - Schwarzhans, Werner

PY - 2015

Y1 - 2015

N2 - Hymenocephalus yamasakiorum, a new species of grenadier fishes, is described from a single specimen collected from Tosa Bay off Aki, Kochi, Japan, at a depth of 320–400 m. The species is distinguished from its 26 known congeners in having the following combination of features: pelvic-fin rays nine; pectoral-fin rays i16–i17; first dorsal-fin rays II, 10; chin barbel 55 % of head length (HL), its tip extending beyond the hind margin of orbit when laid back; snout moderately high, not depressed, length 28 % HL; orbit diameter 33 % HL; interorbital width 24 % HL; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; dorsal half of posterior part of tail prominently blackish.

AB - Hymenocephalus yamasakiorum, a new species of grenadier fishes, is described from a single specimen collected from Tosa Bay off Aki, Kochi, Japan, at a depth of 320–400 m. The species is distinguished from its 26 known congeners in having the following combination of features: pelvic-fin rays nine; pectoral-fin rays i16–i17; first dorsal-fin rays II, 10; chin barbel 55 % of head length (HL), its tip extending beyond the hind margin of orbit when laid back; snout moderately high, not depressed, length 28 % HL; orbit diameter 33 % HL; interorbital width 24 % HL; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; dorsal half of posterior part of tail prominently blackish.

KW - Kochi

KW - New species

KW - Northwestern Pacific

KW - Otoliths

U2 - 10.1007/s10228-015-0464-9

DO - 10.1007/s10228-015-0464-9

M3 - Journal article

AN - SCOPUS:84945470258

SN - 1341-8998

VL - 62

SP - 504

EP - 511

JO - Ichthyological Research

JF - Ichthyological Research

IS - 4

ER -

A new grenadier of the genus Hymenocephalus from Tosa Bay, southern Japan (Actinopterygii: Gadiformes: Macrouridae)

Abstract

Keywords

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