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Eogonatus Nesis, 1972

Eogonatus tinro Nesis, 1972

Tsunemi Kubodera, F. G. Hochberg, Richard E. Young, and Michael Vecchione
Containing group: Gonatidae


Eogonatus tinro was first described but not named by Fields and Gauley (1971) then described and named by Nesis (1972). The paralarval, early juvenile and mature adult stages are not known. E. tinro is uncommon and although generally thought to be a small species, may reach a rather large size (Katugin, personal communication).

 image info

Figure. Ventral and side views of E. tinro, ca. 90 mm ML. Note the very large eyes, small tentacles and long tail. ©


A gonatid ...


  1. Arms
    1. Hooks in medial two armature series on arms I-III.

  2. Tentacles
    1. Tentacles present in subadults.
    2. Tentacular club without hooks.
    3. Suckers of tentacular club in numerous irregular series; suckers about equal in size.
    4. Proximal locking-apparatus of club with suckers and knobs medial to 2-3 small ridges and grooves.
    5.  image info

      Figure. Oral view of the tentacle of E. tinro. Drawing from Nesis (1972).

       image info

      Figure. Oral view of the tentacular club of E. tinro, 65 mm ML, 45°07'N, 162°53'E. Drawing from Fields and Gauley (1971).

  3. Head
    1. Beaks. Information on the beaks of E. tinro can be found here.
    2. Radula with teeth in 5 series.

  4. Mantle
    1. Mantle tissue flabby.

  5. Fins
    1. Fins sagittate, drawn out posteriorly into a short tail.

  6. Photophores
    1. Photophores absent.


Type locality: 58°22.2'N, 174°55'W, Bering Sea, North Pacific.
 image info

Figure. Distribution of E. tinro Dark pink area indicates known range; light pink area indicates inferred range. Chart modified from Okutani, et al. (1988). 


Fields, W. G. and V. A. Gauley. 1971. Preliminary description of an unusual gonatid squid (Cephalopoda: Oegopsida) from the North Pacific. Jour. Fish. Res Bd Canada, 28:1796-1801.

Nesis, K.N. 1972. Two New Species of Gonatid Squids from the North Pacific. Zoologichesky Zhurnal, 51(9): 1300-1307.

Okutani, T., T. Kubodera and K. Jefferts. 1983. Diversity, distribution and ecology of gonatid squids in the subarctic Pacific: A review. Bull. Ocean Res. Inst., Univ. Tokyo, No. 26 (1):150-192.

Title Illustrations
Scientific Name Eogonatus tinro
Reference Nesis, K.N. 1972. Two New Species of Gonatid Squids from the North Pacific. Zoologichesky Zhurnal, 51(9):1300-1307.
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Copyright © 2004 Zoologichesky Zhurnal
About This Page

Tsunemi Kubodera
National Science Museum, Tokyo, Japan

F. G. Hochberg
Santa Barbara Museum of Natural History, Santa Barbara, California, USA

Richard E. Young
University of Hawaii, Honolulu, HI, USA

National Museum of Natural History, Washington, D. C. , USA

Citing this page:

Kubodera, Tsunemi, Hochberg, F. G., Young, Richard E., and Vecchione, Michael. 2006. Eogonatus Nesis, 1972. Eogonatus tinro Nesis, 1972. Version 31 May 2006. in The Tree of Life Web Project,

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