Advertisement

Japanese Journal of Ichthyology

, Volume 36, Issue 4, pp 385–390 | Cite as

Trigonognathus kabeyai, a new genus and species of the squalid sharks from Japan

  • Kenji Mochizuki
  • Fumio Ohe
Article

Abstract

Two specimens of the peculiar squalid shark,Trigonognathus kabeyai gen. et sp. nov., were collected from the coastal waters of Wakayama and Tokushima, Japan, by bottom trawl at depths of 330 and 360 meters. Shape of teeth similar in both jaws; slender, unicuspid, canine-like, without any cusplets or serrations, with weak thin fold on both lingual and labial sides in anterior teeth on both jaws; tooth at symphysis of each jaw longest. Interspace between teeth very wide. Both jaws triangular in shape. Most of dermal denticles on body and head roughly rhombic, swollen very much near central part, with about 10–40 facets on the dorsal surface of its crown. Preoral snout length very short. Many small organs considered to be photophores present mainly on ventral surfaces of head and body.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. Bigelow, H. B. and W. C. Schroeder. 1957. A study of the sharks of the suborder Squaloidea. Bull. Mus. Comp. Zool. Harvard Univ., 117(1): 1–150, pls. 1–3.Google Scholar
  2. Chu, Y.-T., C.-W. Meng and J.-X. Lin. 1981. Description of a new genus and a new species of Squalidae of China. Act. Zootaxon. Sinica, 6(1): 100–103. (In Chinese.)Google Scholar
  3. Compagno, L. J. V. 1984. FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1. Hexanchiformes to Lamniformes. FAO Fish. Synop., No. 125, vol. 4, Pt. 1, pp. i–viii+1–249.Google Scholar
  4. Dolganov, V. N. 1984. A new shark from the family Squalidae caught on the Naska Submarine Ridge. Zool. Z., 63(10): 1589–1591. (In Russian.)Google Scholar
  5. Springer, V. G. and J. A. F. Garrick. 1964. A survey of vertebral numbers in sharks. Proc. U.S. Natn. Mus., 116: 73–96.Google Scholar
  6. Taniuchi, T. and J. A. F. Garrick. 1986. A new species ofScymnodalatias from the southern oceans, and comments on other squaliform sharks. Japan. J. Ichthyol., 33(2): 119–134.Google Scholar
  7. Yamakawa, T., T. Taniuchi and Y. Nose. 1986. Review of theEtmopterus lucifer group (Squalidae) in Japan. Pages 197–207in T. Uyeno, R. Arai, T. Taniuchi and K. Matsuura, eds. Indo-Pacific fish bioiogy. Ichthyological Soc. of Japan, Tokyo.Google Scholar

Copyright information

© The Ichthyological Society of Japan 1990

Authors and Affiliations

  • Kenji Mochizuki
    • 1
  • Fumio Ohe
    • 2
  1. 1.University MuseumUniversity of TokyoTokyoJapan
  2. 2.Aichi Prefecture Education CenterAichi Pref.Japan

Personalised recommendations