Involutinida
Sign in to saveInvolutinida is an order of foraminifera included in the Spirillinata found in the fossil record from the early Permian to early Late Cretaceous (Cenomanian).
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Within Vinony's link graph, Involutinida is referenced by 92 other articles, and connects out to Ascetosporea, Helen Niña Tappan Loeblich and Imbricatea.
It sits within the topics Foraminifera orders and Spirillinata.
Its subject is documented across 5 Wikipedia language editions.
Wikidata facts
- Parent taxon
- Foraminifera
Show 2 more facts
- taxon name
- Involutinida
- taxon rank
- order
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Encyclopedic overview
4 sectionsContents
- Diagnosis
- Taxonomy
- History
- References
Involutinida is an order of foraminifera included in the Spirillinata found in the fossil record from the early Permian to early Late Cretaceous (Cenomanian).
==Diagnosis== The Involutinida are characterized by a two chambered aragonitic test consisting of an initial spheroidal chamber, or proloculus, enclosed by a tubular second, or main chamber. The test wall may be bilamellar (two layered), the inner layer being microgranular and often dark, the outer hyaline (clear, glassy). Coiling may be planispiral or trochospiral, forming a cone. Lamellar thickenings or pillar-like structures may be found in the umbilical region on one or both sides.
Excerpted from Wikipedia’s “Involutinida” article, available under the CC BY-SA 4.0 licence.