クモガニ科ケアシガニ亜科5種のゾエアの発生

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This paper presents the results of observations of zoeal development of the subfamily Majinae, using Chlorinoides longispinus (De Haan), Leptomithrax bifidus Ortmann, Schizophrys aspera (H. Milne Edwards), Schizophroida simodaensis Sakai and Maja spinigera De Haan, as materials. Larvae of these crabs were reared in the laboratory from hatch to the megalopal stage by feeding with Artemia nauplii. The zoeal characters of the five species are discussed and compared with those of other Majinid crabs. Features in common are as follows : zoeae are comprised of two stages ; chromatophores are distributed on the lateral surface of the carapace and protopod of maxilliped I ; antenna II is the type B_5 ; setations of endopods of maxilla II and maxilliped I, coxas of maxillae I and II, and protopods of maxillipeds I and II are 5, 4・1-2-1-2-3, 4・3 (7), 1:3・1:2, 3・2・2・2 and 0・1・1・1, respectively ; in stage II, antenna I develops an unsegmented endopod, a plumose seta appears on the outer margin of basis of maxilla I, and articulation of telson occurs ; setations of bases of maxillae I and II are 7 and 4・5 in stage I, and 9 and 5・5 in II ; and a plumose seta at the distal part of scaphognathite is distinctly larger than the others in stage I. The differences among the nine species may be seen in the presence or absence of carapace spines, that of chromatophores on the base of the dorsal carapace spine and on the protopod of maxilliped II, and that of mid-lateral projections of abdominal segments II and III, the type of telson, setations of endopods of maxilla I and maxilliped II, and the extent of the growth rates in postero-lateral spines of abdominal segments III to V.
社団法人日本動物学会の論文
1981-09-25

著者

寺田正之
静岡県立横須賀高等学校

クモガニ科ケアシガニ亜科5種のゾエアの発生

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