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Free Content The Larval Stages of Some Australian Species of Halicarcinus (Crustacea, Brachyura, Hymenosomatidae). I. Morphology

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The larval stages of Halicarcinus ovatus, H. rostratus, H. australis, H. paralacustris, and H. lacustris are described from their development in the laboratory and from field collections. The freshwater H. lacustris has no free larval stages; other, marine and estuarine, species have three zoeal stages and no megalopa. Other features in which there is considerable interspecific variation in larval morphology are overall size, carapacial shape and spines, antennal form, and telson-fork spines. Four diagnostic features, relating to telson, antenna, 2nd maxilla, and pleopods, are proposed for hymenosomatid zoeae.

Document Type: Research Article

Publication date: June 1, 1971

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