A new species of the grenadier genus Coelorinchus (Actinopterygii: Gadiformes: Macrouridae) from the Timor Sea, Eastern Indian Ocean

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Abstract

Coelorinchus okamurai sp. nov. is described from five specimens collected in the Timor Sea at a depth of 610–690 m. The new species belongs to the Coelorinchus japonicus group (redefined in this study), and differs from all other congeners in having the following combination of features: snout moderately long, sharply pointed in lateral and dorsal views, length 39–42% of head length; lateral nasal ridge completely supported by nasal bone; light organ short, length less than 1/2 orbit diameter, its anterior margin falling far short of pelvic-fin bases; premaxillary teeth in short, uniformly wide band, with posterior end of the tooth band not reaching lateral corner of mouth; no teeth greatly enlarged; body scales covered with short, reclined, narrowly blade-like spinules in widely divergent rows; buttresses of body scale spinules scarcely developed; occipital scales between parietal ridges armed with divergent rows of long, erect, needle-like spinules; nasal fossa usually naked (a few small scales rarely present anteroventrally); patches of small scales sparsely distributed on ventral surface of head; scales on underside of head armed with 1–3 rows of short, erect, needle-like to knife-like spinules; interdorsal space longer than first dorsal-fin base length; subopercle terminating as a long, slender flap; body dark overall without prominent markings; fins uniformly blackish.

Keywords

Taxonomy Morphology Deep-sea fish Indonesia 

Supplementary material

10228_2017_585_MOESM1_ESM.pdf (131 kb)
Supplementary material 1 (PDF 130 kb)

References

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Copyright information

© The Ichthyological Society of Japan 2017

Authors and Affiliations

  1. 1.The Kyoto University MuseumKyoto UniversityKyotoJapan
  2. 2.Laboratory of Marine Biology, Faculty of ScienceKochi UniversityKochiJapan

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