• Title/Summary/Keyword: carapace spines

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Larval Development of llyoplu dentimerosa Shen, 1932 (Decapoda, Brachyura, Ocvpodidae) Reared in the Laboratory (실험실에서 사육된 털콩게 Ilyoplax dentimerosa Shen, 1932의 유생발생)

  • 고현숙;김창현
    • The Korean Journal of Zoology
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    • v.34 no.1
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    • pp.93-102
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    • 1991
  • Larvae of Ilyoplax dentimerosa Shen, 1932 were reared in the laboratory at $25^{\circ}C$ and 33.3%o salinity. Four zoeal stages were recognized in the lanral development, and these are described and illustrated. The first soeae of 1. dentimerosa are distinguished from other llyoplax zoeae by having minute spicules on the rostral and dorsal carapace spines, a short dorsal carapace spine about half of the carapace length, a conspicuous antennal exopodite with a subterminal sutta and acute spines on the postero-lateral border of the fourth abdominal somite.

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A New Species of the Genus Dimorphostylis (Cumacea, Diastylidae) from Korea

  • Lee, Kyung-Sook
    • Animal cells and systems
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    • v.6 no.1
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    • pp.23-33
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    • 2002
  • A new species, Dimorphostylis namhaedoensis (Cumacea, Diastylidae) is described on the basis of the specimens collected from southern shallow coast of Korean peninsula. The new species resembles four other species, D. asiatica, D. valida, D. hisuta and D. acroplicata, in having three apical spines on the terminal margin of the male telson and three pairs of the oblique ridges on the carapace, but are obviously distinguished from them in that the pattern of the ridges on the carapace is different and the third article of the antennular peduncle is very long in female. Furthermore, the dorsal carina of the female carapace has a row of forward spines and among the three apical spines of male telson, the median spine is much smaller than the lateral ones.

First Zoeas of Nursia rhomboidalis and Pyrhila carinata (Crustacea: Decapoda: Leucosiidae) with a Key to the Known Zoeas of Ten Leucosiid Species from Korean Waters

  • Lee, Seok Hyun;Ko, Hyun Sook
    • Animal Systematics, Evolution and Diversity
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    • v.33 no.4
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    • pp.228-234
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    • 2017
  • The first zoeas of Nursia rhomboidalis and Pyrhila carinata were obtained from laboratory condition. They are described and illustrated for the first time. Morphological comparison with those of other Korean described species of the family Leucosiidae reveals that the zoea of N. rhomboidalis is very similar to those of Myra fugax and Arcania undecimspinosa based on characteristics of the carapace spines length, the antenna morphology, the maxilla endopod setation, and the telson, whereas, the zoea of Py. carinata coincides well with those of Philyra kanekoi and Pyrhila pisum based on characteristics of the carapace spines length, the antenna morphology, the maxilla endopod setation, and the telson. Furthermore, we find that at least two groups of zoeas exist in the Korean species of the subfamily Ebaliinae. A provisional key to the known zoeas of ten leucosiid species from Korean waters is provided.

Zoeal Development of Telmessus acutidens (Crustacea: Decapoda: Brachyura: Atelecyclidae) Reared in the Laboratory

  • Ko, Hyun-Sook
    • Animal Systematics, Evolution and Diversity
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    • v.22 no.2
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    • pp.127-138
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    • 2006
  • An ovigerous hair crab, Telmessus acutidens, was collected in South Korean waters and its larvae were reared in the laboratory. The larval development consists of four zoeal (including an extra zoeal stage) and one megalopal stages. Four zoeal stages are described and illustrated in detail. The zoeas of the present material show some differences from Kurata (1963)'s plankton-collected zoea of T. acutidens in the characteristics of the carapace spines, an endopod and an exopod of the antenna, and the posterolateral process of the abdominal somite. Kurata's zoea agreed well with that of T. cheiragonus. So, it is suggested that Kurata's zoea may be the second zoea of T. cheiragonus.

The Complete Larval Development of a Sand Bubbler Crab, Scopim era bitympana Shen(Brachyura, Ocypodidae),Reared in the Laboratory (실험실에서 사육된 눈콩게 Scopimera bitympana(달랑게과)의 유생발생)

  • 장인권;김창현
    • The Korean Journal of Zoology
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    • v.33 no.2
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    • pp.200-216
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    • 1990
  • The complete larval development of Scopimera bitympana Shen was descdbed and mustrated from the larvae reared in the lahoratory. S bItympana had five, or occasionally six, zoeal and one megalopal stages. At $25^{\circ}C$, the megalopa and the first crab instar were attained in 24 and 38 days (31 and 48 days in six zoeal series) after hatching respectively. S.bitympana zoeae can be distinguished from other described zoeae in the genus by the toothed carapace spines and the telson with a dorsal and two ventral spines. Megalopa of this species can be distinguished from other ScopimeTa spedes by the feature of carapace. Other minor morphological features of S. bitympana larvae are compared to the previous descripdons of larvae of the genus and the morphological differences are briefly discussed.

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Complete Larval Development of a Sand Bubbler Crab, Scopimera longidactyla (Brachyura, Ocypodidae), Reared in the Laboratory (실험실에서 사육된 발콩게 (Scopimera longidactyla (달랑게과) 의 유생발생)

  • 장인권;김창현
    • Animal Systematics, Evolution and Diversity
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    • v.5 no.2
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    • pp.121-137
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    • 1989
  • The larval stages of Scopimera longidactyla reared in the laboratory are described and illustrated in detail. The larval development consists of five zoeal and a megalopal stages. At 25$^{\circ}C$, the megalopa and the first crab instar were attained in 21 and 31 days after hatching, respectively. The larvae of Scopmera can be distinguished from those of other genera in the Scopimerinae and other sumbfamilies in the Ocypodidae by the relativelength of rostral carapace spines to carapace. The larvae of S. longidactyla are similar in morphology to those of S. globosa but distingished by the differences in larval , size, and appendage setation.

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New Report of Two Species of Crabs, Cycloes granulosa and Pugettia vulgaris (Crustacea: Decapoda) Collected from Korea

  • Yang, Kea Cheong;Lee, Seok Hyun;Ko, Hyun Sook
    • Animal Systematics, Evolution and Diversity
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    • v.31 no.3
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    • pp.201-207
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    • 2015
  • Two species of crabs, Cycloes granulosa and Pugettia vulgaris, are described and illustrated for the first time in Korea. The former is the first species of calappoid genus Cycloes and characterized by having a minute lateral spine on the margin of carapace. The latter is a species of majoid crab and similar to P. pellucens. However, it can be distinguished by shorter rostral spines, a smaller hepatic spine, and a carapace entirely covered with short setae. In Korea the calappoid crab now includes seven species of three genera (Calappa, Mursia, and Cycloes) and the majoid genus Pugettia consists of six species.

New Record of Kentrocapros flavofasciatus (Kamohara, 1938) (Tetraodontiformes: Aracanidae) in Korea (한국산 육각복과(Aracanidae) 어류 1미기록종, 황줄육각복(Kentrocapros flavofasciatus) (Kamohara, 1938))

  • Kim, Kyeong-Mu;Kim, Jin-Koo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.5
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    • pp.589-593
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    • 2017
  • A single specimen of Kentrocapros flavofasciatus (measuring 145.9 mm in length) belonging to the family Aracanidae, order Tetraodontiformes, was collected for the first time in 2017 on Jeju Island, Korea. This specimen had isolated bony plates on a caudal peduncle, a carapace with six ridges, and a tail depth equal to its tail length. It is similar to K. aculeatus and K. rosapinto but differs from K. aculeatus in that its carapace is without spines; it differs from K. rosapinto in that the anterior end of its gill opening does not reach below the center of its eye. We propose new Korean names: Yug-gak-bok-gwa for the family Aracanidae, and Hwang-Jul-yug-gak-bok for the species K. flavofasciatus.

Early zoeal stages of edible crab Erimacrus isenbeckii (Brandt, 1848) (Crustacea: Decapoda: Brachyura: Cheiragonidae) and a comparison with other cheiragonid zoeae

  • Lee, Chu;Ko, Hyun-Sook
    • Animal cells and systems
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    • v.14 no.4
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    • pp.323-331
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    • 2010
  • Ovigerous crabs of Erimacrus isenbeckii were collected from the northeastern coast of South Korea and their larvae were reared in the laboratory. Two zoeal stages were described and illustrated in detail. The first zoeal characteristics between the present material and Sasaki and Mihara's (1993: J Crust Biol. 13:511 522) were different especially in the setations of the endopods of the maxillipeds. The zoea of Erimacrus isenbeckii strongly resembled those of two Telmessus species in the Cheiragonidae, but the former could be distinguished from the latter by having spinulate carapace spines, a lateral process on the abdominal somite 3, and longer lateral spines on the telson fork.

Nippoleucon projectus, a New Species of Leuconid Cumaceans (Cumacea, Leuconidae) from Korea

  • Lee, Chang-Mok;Lee, Kyung-Sook
    • Animal cells and systems
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    • v.10 no.2
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    • pp.93-101
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    • 2006
  • A new species of leuconid cumaceans, Nippoleucon projectus n. sp. is described on the basis of the specimens collected from western shallow coast of the South Korea. This new species is easily distinguished from two previously recorded species (N. hinumensis and N. enoshimensis) in having the fifth abdominal segment prominently projected to rear at dorsal posterior portion and the carapace of the female with three spines on the frontal lobe.