• Title/Summary/Keyword: Cambaridae

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Postembryonic Development of the Korean Crayfish, Cambaroides similis (Decapoda, Cambaridae) Reared in the Laboratory (한국산 가재 Cambaroides similis (십각목, 가재과)의 후기배발생)

  • Ko, Hyun-Sook;Tadashi Kawai
    • Animal Systematics, Evolution and Diversity
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    • v.17 no.1
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    • pp.35-47
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    • 2001
  • The postembryonic development of the Korean crayfish, Cambaroides similis (Koelbel, 1892), was described in detail and compared with those of other known species of Astacidae and American Cambaridae, and phylogenetic relationship of the genus Cambaroides was discussed. Ovigerous females of the Korean crayfishes appear in May. Durations of juvenile stages 1 and 2 are two and four weeks at 15.0 $\pm$ 0.5$^{\circ}C$, respectively. From juvenile stage 3, it leaves from its mother. It is considered that C. similis is very closely related more to the Astacidae than to the Cambaridae in the characteristics of the maxillule of juvenile stage 1 and the antenna, maxilla, pleopod, and telson of juvenile stage 2.

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Reassessment of Cambaroides dauricus and C. schrenckii (Crustacea: Decapoda: Cambaridae)

  • Kawai, Tadashi;Machino, Yoichi;Ko, Hyun-Sook
    • Animal cells and systems
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    • v.7 no.3
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    • pp.191-196
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    • 2003
  • Taxonomic confusion has been presented within freshwater crayfishes of the genus Cambaroides since Starobogatov published morphological definition and revision of the group in 1995. He suggested that Cambaroides should be revised: the C. dauricus, contained three species C. dauricus, C. wladiwostokiensis, and C. koshewnikowi; the C. schrenckii with two. species C. schrenckii and C. sachalinensis. Also Straovogatov did not take into account the previous data. of crayfish distributions. In order to. clear up the confusion, the taxonomy of crayfish sampled from Mongolia, Russia, China, and North Korea was reassessed. Starovogatov's key could not lead to the correct identification. Also, detailed observations of apical robe of the male first pleopod did not support the taxonomy on the genus Cambaroides proposed by Starobogatov in 1995. However, some local variations of morphology exist in rostrum, pleuron, and telson of Asian crayfish. Future studies should be concentrated on whether there are geographical clines of morphology or if taxonomic subdivision is necessary.