Family CALVETIIDAE Borg, 1944
Compiler and date details
July 2001 - Dr Philip Bock
Introduction
Introduced by Borg (1944) for the new genus Calvetia, monotypic for C. dissimilis sp.nov., this family is known still by this single genus, which is an Antarctic endemic. C. dissimilis develops robust, heavily calcified, erect colonies, with round-ended cylindrical branches. Zooid apertures open on all surfaces of the colony and are clearly not arranged in regular series. The brood chamber is a gonozooid with reticulated calcification and a slit-like aperture; gonozooids develop just proximal to branch dichotomies. Calcification thickens through ontogeny, developing a strong, longitudinal ridging.
Diagnosis
Colony heavily calcified, becoming massive, with longitudinal ridges. Branches erect and cylindrical with zooids opening on all faces. Gonozooids proximal to branch dichotomies, with reticulated surface calcification and slit-like apertures.
General References
Borg, F. 1944. The stenolaematous Bryozoa. Further Zoological Results of the Swedish Antarctic Expedition, 1901-1903 3(5): 1-276
History of changes
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 25-Mar-2014 | BRYOZOA Ehrenberg, 1831 | 25-Mar-2014 | MODIFIED | Dr Robin Wilson (NMV) Elizabeth Greaves (NMV) |
| 12-Feb-2010 | (import) |