• Animal cells and systems
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• v.3 no.2
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• pp.127-131
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• 1999

The first zoeal stage of Pachycheles hertwigi Balss is described and illustrated. Its morphological characteristics are compared with those of other known species of Pachycheles. The first zoeas of P. hertwigi and P. stevensii are very similar, but they can be distinguished from each other by the length of carapace spine and the size of antennal exopod spinules.

• The Korean Journal of Zoology
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• v.36 no.3
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• pp.391-401
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• 1993

The eight species, Axiopsis (Axiopsis) princeps, Petrolisthes japonicus, Pachycheles stevensii, Paguristes acanthomerus, P. japonicus, Elassochirus cavimanus, Pagurus Japonicus, P. trigonocheirus, are added to the thalassinidean and anomuran fauna of the areas of the Ulreung and Dogdo Islands. With the previously reported 10 species from these areas, the total 18 spedes are listed and an illustrated key is provided.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.1
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• pp.257-269
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• 2017

The occurrence variations of decapods by season and depth off Oryuk Islets, Busan were investigated at seven stations in April and October 2009, July 2010 and January 2011. Decapods were collected by SCUBA diving at 5 m and 10 m depths. 46 species belonging to 18 families in 3 orders were identified. Pilumnus minutus, Pugettia intermedia, Pachycheles stevensii, and Paguristes japonicus were dominant species, comprising 73.0% of total decapods. P. minutus and P. intermedia were abundant in all seasons (except summer) while P. stevensii and P. japonicus were abundant in fall and summer. Dominant species were divided into three groups (resident species, seasonal species and temporary species) on the basis of their occurrence patterns. P. minutus and P. intermedia were resident species while P. stevensii, P. japonicus were temporary species. The species number, density and biomass of decapods were fluctuated by seasons. They were highest in fall and lowest in winter. This study implied that the variations of species number and density of decapods were significantly related with seasonal change of water temperature.