title: Staurocalyptus
text: # Staurocalyptus
  
  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 Lambe, 1893 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 Ijima, 1897. However, as of 2017, 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 30–1,700 metres (98–5,577 ft).
  
  ## Species
  
  As of 2017, WoRMS recognizes the following seventeen species:
  
  * Staurocalyptus affinis Ijima, 1904
  * Staurocalyptus celebesianus IIjima, 1927
  * Staurocalyptus dowlingi (Lambe, 1893) Ijima, 1897
  * Staurocalyptus entacanthus Ijima, 1904
  * Staurocalyptus fasciculatus Schulze, 1899
  * Staurocalyptus fuca Tabachnick, 1989
  * Staurocalyptus glaber Ijima, 1897
  * Staurocalyptus hamatus Lendenfeld, 1915
  * Staurocalyptus heteractinus Ijima, 1897
  * Staurocalyptus microchetus Ijima, 1898
  * Staurocalyptus pleorhaphides Ijima, 1897
  * Staurocalyptus psilosus Reiswig & Stone, 2013
  * Staurocalyptus roeperi (Schulze, 1886) Ijima, 1897
  * Staurocalyptus rugocruciatus Okada, 1932
  * Staurocalyptus solidus Schulze, 1899
  * Staurocalyptus tubulosus Ijima, 1904
  * Staurocalyptus tylotus Reiswig & Stone, 2013
  