Staurocalyptus Dowlingi on:
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''Staurocalyptus'' is a genus of
Ijima circumscribed ''Staurocalyptus'' as a genus in the family
sponge
Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ...
. It was circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
in 1897 by 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 Uni ...
.
Taxonomy
Ijima circumscribed ''Staurocalyptus'' as a genus in the family Rossellidae
Rossellidae is a family of glass sponges belonging to the order Lyssacinosa. The family has a cosmopolitan distribution and is found at a large range of depths (, and likely deeper).
Description
The body is usually a cup-like structure. In sta ...
. His initial taxonomy included three newly described species and two transferred from ''Rhabdocalyptus''. Ijimi did not designate a type species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...
; in 1967 V. M. Koltun designated ''Rhabdocalyptus dowlingi'' as the type species. A 2002 revision of Rossellidae
Rossellidae is a family of glass sponges belonging to the order Lyssacinosa. The family has a cosmopolitan distribution and is found at a large range of depths (, and likely deeper).
Description
The body is usually a cup-like structure. In sta ...
by K. R. Tabachnick demoted ''Staurocalyptus'' to be a subgenus of '' Acanthascus'' and designated a new type species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...
: ''Staurocalyptus glaber'' . However, , WoRMS Worms may refer to:
*Worm, an invertebrate animal with a tube-like body and no limbs
Places
*Worms, Germany, a city
**Worms (electoral district)
*Worms, Nebraska, U.S.
*Worms im Veltlintal, the German name for Bormio, Italy
Arts and entertainme ...
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'' * '' Staurocalyptus fasciculatus'' * '' Staurocalyptus fuca'' * '' Staurocalyptus glaber'' * '' Staurocalyptus hamatus'' * '' Staurocalyptus heteractinus'' * '' Staurocalyptus microchetus'' * '' Staurocalyptus pleorhaphides'' * '' Staurocalyptus psilosus'' * '' Staurocalyptus roeperi'' * '' Staurocalyptus rugocruciatus'' * '' Staurocalyptus solidus'' * '' Staurocalyptus tubulosus'' * '' Staurocalyptus tylotus''References
Further reading
* * * * * Hexactinellida Sponge genera {{sponge-stub