ワタリガニ科ガザミ亜科ゾエア幼生の分類

概要

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This paper describes the entire course of zoeal development of nine species belonging to the subfamily Portuninae. Under laboratory conditions, the number of zoeal stages is constant in almost all the species. As shown in Table 1, Portunus pelagicus and P. trituberculatus have four zoeal stages, P. haani has five, and Thalamita sima and five species of Charybdis six, except C. miles and C. variegata which have seven. Unfortunaterly, P. sanguinolentus did not live beyond stage III. All of the species are similar in appendage features, which are constant through out all the stages except for some slight differences. Therefore, for the identification of species, it is necessary to rely upon the limbs which undergo developmental changes. A key presented (Table 3) is an attempt to identify zoeas on this ground. Items comprising the key are: the type of telson, presence or absence of chromatophores on the carapacial center and on the protopod of maxillipede I, the setations on the endopods of maxilla I and maxillipede I, the setation on the inner lobe of the coxa of maxilla II, the number of natatory setae on maxillipedes I and II, and the period of articulation of the telson.
社団法人日本動物学会の論文
1979-09-25