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  • noun zoology Any member of the Tetragonuridae.


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  • The tetragonurid squaretails are round fishes encircled by ridged scales and with a long caudal peduncle that has a single keel on either side formed from scale ridges.

    --Gene S. Helfman, Bruce B. Collette and Douglas E. Facey, 1997 The Diversity of Fishes, p. 267

    June 19, 2010