• Animal Systematics, Evolution and Diversity
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• 제32권1호
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• pp.49-54
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• 2016

Korean nannastacids have recorded only eight species belonging to genera Campylaspis and Cumella. In this paper, Nannastacus nyctagineus Gamȏ, 1962, is redescribed and illustrated as a new species of Korean fauna in this study for the first time. Korean female specimens of Nannastacus nyctagineus correspond well with the original description by Gamȏ, 1962 based on only female specimens. Gamȏ has described that new species, Nannastacus pruinosus could be distinguished from N. nyctagineus based on only male specimens. The Korean male specimens of N. nyctagineus undoubtedly match well with the description of N. pruinosus with the following common features: the surface of the carapace is covered with numerous granules; pereonites and pleonites have similar patterns of the teeth on dorsal surface; the proportion and armature of the dactylus of pereopod 2 is similar; the number and pattern arrangement of the setae on the surface in antenna 1, pereopod 1, and uropod are the all most same. Nannastacus pruinosus Gamȏ, 1962 is proposed as a synonym of N. nyctagineus described in this study. This represents the first record on the genus Nannastacus from Korea.

• 한국수산과학회지
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• 제2권1호
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• pp.1-15
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• 1969

Pagurus lanuginosus do Haan의 유생을 실험실에서 사육하며 glaucothoe기까지의 발생을 관찰 연구하였다. 1) P. lanuginosus는 4기의 Zoea기와 1기의 glaucothoe기의 유생기를 가졌다. 2) 평균 수온 $13.6^{\circ}C$와 평균 염분농도 $33.67\%_{\circ}$의 사육조건에서 알에서 부화한 zoea유생은 31-32일 후에 glaucothoe 유생으로 변태 발생했다, 3) 각 zoea기의 평균기간은 7-9일이었다. 4) zoea 유생의 가장 독특한 형태적 특징의 하나로 미선(telson)의 말만에 3쌍의 들기(1쌍의 털과 6쌍의 침)를 가지며 그 돌기의 수와 모양은 전 zoea기 동안에 변함이 없다. 5) zoea 유생의 제2 촉각의 외지의 내변에는 5개의 우상모가 나 있다. 6) glaucothoe 유생의 telson 말단에는 3쌍의 우상모가 나 있다. 7) glaucothoe 유생은 안병극을 갖지 않는다.

• Animal cells and systems
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• 제13권1호
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• pp.59-69
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• 2009

This paper documents the defining morphological characteristics of the larval stages of Chionoecetes tanneri Rathbun, 1893, the grooved Tanner crab, from specimens reared in the laboratory. Chionoecetes tanneri larval stages include two zoeae and one megalopa. The first zoea is characterized by: six setae on the posterior margin of the carapace; postero-lateral spines on abdominal somites 3 and 4, extending beyond the posterior margin of adjacent somites and bearing 9-10 spinnules; 12 plumose setae and one stout distal plumose seta present on the margin of the scaphognathite of the maxilla; and one fused lateral spine and one articulated dorso-medial spine on each fork of the telson. The second zoea is characterized by: 9 setae on the postero-lateral margin of the carapace; a serrated mandible molar; a mandibular palp bud; 25-26 plumose setae on the margin of the scaphognathite of the maxilla; pereiopods with well-developed gills and buds; and four pairs of stout setae on the posterior margin of the telson. For the megalopal stage, the distinguishing characteristics include: a rostral spine equal in length to the supraorbital spine; six setae on the exopod of the uropod; and a single spine on the ischium of the second pereiopod. This study allows C. tanneri larvae to be distinguished from the larvae of known sympatric congeners. This information provides a basic taxonomic tool for researchers in fisheries management and zooplankton ecology who are addressing issues related to trophic interactions, metapopulation dynamics and ecosystem impacts in the evolving marine resource management strategies in the North Pacific, and those related to Chionoecetes species in particular.