Stigmatella (bryozoan)

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Stigmatella
File:Stigmatella personata.jpg
Stigmatella personata; trepostome bryozoan encrusting the underside of a carbonate hardground; Corryville Formation; Upper Ordovician; Mason County, Kentucky.
Scientific classification
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Stigmatella

Ulrich and Bassler, 1904[1]
Species

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)

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]

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

See also

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References

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  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. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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