Staurocalyptus Fuca
''Staurocalyptus'' is a genus of sponge. It was circumscribed in 1897 by Isao Ijima. Taxonomy Ijima circumscribed ''Staurocalyptus'' as a genus in the family Rossellidae. His initial taxonomy included three newly described species and two transferred from ''Rhabdocalyptus''. Ijimi did not designate a type species; in 1967 V. M. Koltun designated ''Rhabdocalyptus dowlingi'' as the type species. A 2002 revision of Rossellidae by K. R. Tabachnick demoted ''Staurocalyptus'' to be a subgenus of ''Acanthascus'' and designated a new type species: ''Staurocalyptus glaber'' . However, , WoRMS still classifies ''Staurocalyptus'' as a genus and follows Koltun's type species designation, not that of Tabachnick. Distribution Its species are found in the Pacific Ocean, at a depth of . Species , WoRMS recognizes the following seventeen species: * '' Staurocalyptus affinis * '' Staurocalyptus celebesianus * '' Staurocalyptus dowlingi'' * '' Staurocalyptus entacanthus'' * '' Staurocalyptu ...
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Isao Ijima
was a Japanese zoologist known for his studies of sponges (Porifera) — including his circumscription of the genus '' Staurocalyptus'' — leeches (Hirudinea), flatworms (Turbellaria), birds, and fish. Professor of Zoology at Tokyo Imperial University, he is considered the founder of parasitology in Japan and was the first President of the Ornithological Society of Japan. Taxa named in his honour include Ijima's sea snake and Ijima's leaf warbler. Biography Born in Hamamatsu in 1861 into a samurai family of Hamamatsu Domain, at t