• International Journal of Advanced Culture Technology
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• v.8 no.2
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• pp.277-282
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• 2020

The first zoea of Microcassiope orientalis is described and illustrated from laboratory hatched materials. Comparisons with previous studies of the first zoeal stages in the Xanthidae from Korean waters, revealed that some former studies were incorrected. The first zoea of M. orientalis described by Ko was identical to the first zoea of Macromedaeus distinguendus described by Terada. In addition, zoeal stages of Nanocassiope granullipes described by Ko & Clark was revealed the zoeal stages of M. cassiopes. So, the first zoea of M. orientalis is redescribed and illustrated in detailed with color photo herein, and compare its morphological characteristics with previous described zoea of N. granulipes by Ko & Clark.

• Animal Systematics, Evolution and Diversity
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• v.20 no.1
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• pp.1-8
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• 2004

The first zoea of R. uritai is described in detail, based on laboratory-hatched material. The first zoea of R. uritai can be distinguished from that of R. conspiciocellus and R. durbanensis by the rostrum downwards, overreaching distal margin of the outer flagellum of the antenna, the endopod of the antenna with short seta as well as long plumose seta distally, and the scale of the antenna six-segmented. The shape of the telson can be a distinguishing character of the first zoea of Rhynchocinetes from that of Cinetorhynchus.

• The Korean Journal of Zoology
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• v.39 no.1
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• pp.106-114
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• 1996

Zoeae of Alpheus euplirosyne rlchardsoni Valdwyne, 1971 reared in the laboratory are described and Illustrated The culture was carded out under the laboratory condition with the photoperiod l4hr light and lOhr darkness and salinity of 33.3$\textperthousand$ at 25$^{\circ}$C. This species exhibits extended development on the egg size just before hatching and on the length of the first zoea. The morphological differences between the first zoea of this species and those of five other species in the same genus are discussed.

• Animal Systematics, Evolution and Diversity
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• v.23 no.2
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• pp.205-208
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• 2007

The first zoeal characters of plagusiine crab Plagusia dentipes De Haan, 1835, belonging to the family Grapsidae, is described and illustrated in detail based on laboratory-hatched material from an ovigerous female collected from Bomok, Seogwipo in the Jejudo Island. Morphological comparison is made with previous description of Plagusia dentipes from Japan. The first zoea of Plagusia dentipes can be readily distinguished from those of two species of Plagusia chabrus and Plagusia depressa by having 2 aesthetascs and 3 simple setae on the antennule, and 8 setae on the coxal endite of the maxilla.

• Animal Systematics, Evolution and Diversity
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• v.38 no.2
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• pp.83-90
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• 2022

Ovigerous crab of Sphaerozius nitidus of the family Menippidae was collected from Geojedo, Gyeongsangnamdo and hatched in the laboratory. Digital imaging of live zoeas of the first zoea stage of S. nitidus has been reported for the first time in the world, and its morphology has been redescribed and illustrated. This study is different from former study in that it has three unequal setae with exopod of antenna, 5+4 setae with basial endite of maxilla, and dorsomedial spine and lateral minute spine with fork of telson. The first zoea of S. nitidus has black pigments occurring behind the eyes, on the dorsal spine medially and on the basis of lateral carapace spines, on basal of basis of maxillipeds 1, 2, and posterior margins of somites 1-5, and yellowish green chromatophores on the dorsal spine.

• Animal cells and systems
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• v.9 no.3
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• pp.135-138
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• 2005

The first zoea of Eriphia sebana is described and illustrated in detail for the first time. Its morphological characteristics are compared with those of other known species of the Menippidae from the northwestern Pacific Ocean. The general morphology of it corresponds well with other known zoeas of the Menippidae, except that of Sphaerozius nitidus. It is found that the zoeas of E. sebana and E. smithi can be separated by the exopod of the antenna, which has three setae in E. sebana and four setae in E. smithi.

• Animal cells and systems
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• v.11 no.1
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• pp.51-54
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• 2007

The first zoea of Pugettia gracilis is described and illustrated for the first time. Its morphological characteristics are compared with those of other known species of the genus from the northern Pacific waters. Although the Pugettia zoeas of the northwestern and the northeastern Pacifies are very similar, they can be easily distinguished by their dorsal carapace spine. In the northwestern Pacific it is spinulate with a spinous tip, while in the northeastern Pacific it is smooth with a blunt tip.

• Animal Systematics, Evolution and Diversity
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• v.23 no.1
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• pp.69-74
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• 2007

First zoea of cyclograpsinine crab Chasmagnathus convexus (De Haan, 1835) belonging to the family Varunidae, is described and illustrated in detail based on laboratory-hatched material from an ovigerous female collected in Seumjingang river mouth, southern Korea. Morphological comparison is made with previous description of C. convexus from Japan, The first zoea of C. convexus can be readily distinguished from those of six species of Cyclograpsus intermedius Ortmann, 1894, Helicana japonica (K. Sakai and Yatsuzuka, 1980), Helicana wuana (Rathbun, 1931), Helice tientsinensis Rathbun, 1931, Helice tridens (De Man, 1835), and Pseudohelice quadrata (Dana, 1851), the other known cyclograpsinine species in Korea by having the lateral carapace spine, a pair of dorsolateral processes on the fourth abdominal somite, the exopod of antenna with three setae, and the exopod of antenna as being 24.7% length to the protopod.

• Journal of Aquaculture
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• v.14 no.1
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• pp.51-56
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• 2001

At 5$^{\circ}C$ incubation of the brooded eggs of the snow crab, Chionoecetes opilio lasted for 297 days; freshly hatched prezoea molted to become the first zoea in one hour. Length (from the tip of the rostral spines to the tip of the dorsal spines) of the first and second zoeae measured 4.8 and 6.4mm, respectively. Experimental rearing of the larvae at 5, 10, 15 and 2$0^{\circ}C$ indicated that the upper limit of thermal tolerance is 15$^{\circ}C$, as all the reared larvae succumbed at 2$0^{\circ}C$. Intermolt period from the first the first zoea to the second was 57, 32 and 23 days at 5, 10 and 15$^{\circ}C$, respectively and that of the second zoea was 52, 29 and 90 days, respectively. Largest number of larvae survived at 1$0^{\circ}C$.

• Animal cells and systems
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• v.8 no.4
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• pp.251-254
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• 2004

The first zoea of Petrolisthes trilobatus Osawa, 1996, from a female collected in Japan is described and illustrated. Its morphological characteristics are compared with those of other known species of the genus Petrolisthes. The first zoea of P. trilobatus appears very similar to those of P. lamarckii, P. asiaticus and P. hastatus. However, it could be distinguished from the others in having a spine on the lower posterior margin of the carapace, three pairs of setae on the postero-dorsal surface of the telson and minute spinules on the dorsal margins of the abdominal somites 2-5. Based on zoeal morphology, it is suggested that the zoeas of Petrolisthes could be divided into two groups: the first group (P. coccineus, P. moluccensis, P. lamarckii, P. trilobatus, P. asiaticus, P. hastatus, P. pubescens, P. tomentosus, and P. carinipes) and the second one (P. ohshimai, P. armatus, P. boscii, P. tridentatus, P. tonsorius, and P. japonicus).