Stigmatella (bryozoan)

Stigmatella is an extinct genus of bryozoans in the family Heterotrypidae. It is known from the Ordovician period and found in the U.S. states of Ohio, Kentucky and Indiana. Its colonies can form branches, lobes, or masses made from new layers encrusting upon older ones. In Kentucky, fossil remains of species Stigmatella personata that lived in underwater caves have been found, growing 'upside-down' on the cave ceiling. [2]

Longitudinal thin-section of Stigmatella personata encrusting a carbonate hardground; Corryville Formation; Upper Ordovician; Mason County, Kentucky.

Stigmatella
Stigmatella personata; trepostome bryozoan encrusting the underside of a carbonate hardground; Corryville Formation; Upper Ordovician; Mason County, Kentucky.
Scientific classification
Kingdom:
Animalia
Phylum:
Bryozoa
Class:
Stenolaemata
Order:
Trepostomata †
Family:
Heterotrypidae †
Genus:
Stigmatella †

Ulrich and Bassler, 1904[1]
Species
  • Stigmatella catenulata var. a Parks and Dyer (1922)

Stigmatella halysa Armstrong, 1945 (= S. catenulata var. B Parks and Dyer (1922))
Stigmatella halysa crassa Armstrong, 1945 (= S.sessilis crassa Dyer, 1925)
Stigmatella halysa erindalensis Armstrong, 1945
Stigmatella crenulata Ulrich and Bassler (1904)
Stigmatella hybrida Dyer (1925)
Stigmatella personata lobata Dyer (1925)
Stigmatella vulgaris Parks and Dyer (1922)

See also

References
  1. Redescription of type specimens of bryozoan Stigmatella from the Upper Ordovician of the Toronto region, Ontario (1973). By Fritz, Madeleine A., 1896, Royal Ontario Museum
  2. Buttler, Caroline; Wilson, Mark (2018). "Paleoecology of an Upper Ordovician submarine cave-dwelling bryozoan fauna and its exposed equivalents in northern Kentucky, USA". Journal of Paleontology. 92 (4): 568–576. doi:10.1017/jpa.2017.131. S2CID 135141233.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.