Trepostomatida

Trepostomatida Temporal range: Early Ordovician–Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Esthoniopora , a trepostome from the Ordovician of Estonia (cross-section).
Scientific classification
Kingdom:	Animalia
Phylum:	Bryozoa
Class:	Stenolaemata
Order:	† Trepostomatida Ulrich 1882 [1]
Families
Heterotrypidae Monticuliporidae [2]
Synonyms
Trepostomata Trepostomida

Trepostome bryozoan with bioerosion; Bellevue Formation, Upper Ordovician (Katian), northern Kentucky.

Trepostomatida (the trepostomates or trepostomes) is an extinct order of bryozoans in the class Stenolaemata. Trepostome bryozoans possessed mineralized calcitic skeletons and are frequently fossilized; some of the largest known fossilized bryozoan colonies are branching trepostomes and massive dome-shaped trepostomes. ^[3] Trepostomes did not have many specialized zooecia beyond ordinary feeding autozooecia. The two main known heteromorphs are exilazooecia and mesozooecia, which had the purpose of maintaining regular spacing between autozooecia. ^[4]

See also

• Taxonomy of commonly fossilised invertebrates

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. New Monticuliporidae (Bryozoa, Trepostomata) from the Cystoid Limestone Formation (Upper Ordovician) of the Iberian Chains (NE Spain). Jimenez-Sanchez Andrea, Geodiversitas, 2010, vol. 32, no2, pages 177-199, INIST   22896890
3. Ernst, Andrej (2020). "2- Fossil record and evolution of Bryozoa". Phylum Bryozoa. pp. 11–56.
4. Ernst, Andrej (2020). "2- Fossil record and evolution of Bryozoa". Phylum Bryozoa. p. 19.

External links

Heterotrypa sp., a trepostome bryozoan from the Corryville Formation (Upper Ordovician) in Covington, Kentucky.