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The Diphyletic Nature of the Infraorder Thalassinidea (Decapoda, Pleocyemata) as Derived from the Morphology of the Gastric Mill

K. Sakai
Crustaceana
Vol. 77, No. 9 (Oct., 2004), pp. 1117-1129
Published by: Brill
Stable URL: http://www.jstor.org/stable/20107419
Page Count: 13
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The Diphyletic Nature of the Infraorder Thalassinidea (Decapoda, Pleocyemata) as Derived from the Morphology of the Gastric Mill
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Abstract

A comparison of the gastric mill in some representative species of the Thalassinidea, indicates that the Thalassinidea are possibly diphyletic, consisting of the superfamily Callianassoidea Dana, 1852, including the families Callianassidae Dana, 1852, Axiidae Huxley, 1879, Callianideidae Kossmann, 1880, Ctenochelidae Manning & Felder, 1991, and Gourretiidae Sakai, 1999, in which the propyloric ossicle is simple and has a smooth posterior surface; and the superfamily Thalassinoidea Latreille, 1831, including the Thalassinidae Latreille, 1831, Upogebiidae Borradaile, 1903, and Laomediidae De Haan, 1849, in which the propyloric ossicle is triangularly protruded downwards and has a series of fine, transverse septa on its posterior face. /// Ein Vergleich der Kaumägen ausgewählter Arten der Thalassinidea deutet an, dass die Thalassinidea möglicherweise diphyletisch sind. Sie bestehen aus zwei Überfamilien, einerseits den Callianassioidea Dana, 1852, bei denen der propylorische Mittelzahn einfach und dessen Rückseite glatt ist, andererseits den Thalassinoidea, bei denen dieser Zahn dreieckig vorragt und auf der Rückseite transversale Septen trägt. Zu den Callianassoidea gehören die Familien Callianassidae Dana, 1852, Axiidae Huxley, 1879, Callianideidae Kossmann, 1880, Ctenochelidae Manning & Felder, 1991 und Gourretiidae Sakai, 2004; zu den Thalassinoidea die Familien Thalassinidae Latreille, 1831, Upogebiidae Borradaile, 1903 und Laomediidae De Haan, 1849.

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