Ventrolaminidae
| Ventrolaminidae Temporal range: Bajocian – Berriasian
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| Family: | Ventrolaminidae Weynschenk, 1950
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The Ventrolaminidae are a family of benthic Foraminifera included in the Involutinida, now part of the subclass Spirillinana, class Spirillinata.[1]
Tests of the Ventrolaminidae are lenticular, planispiral, or a low trochospiral with multiple chambers in a rapidly enlarging whorl. The wall is calcareous in two layers. The inner one is microgranular, the outer hyaline glassy).[2]
Two genera are included, Archaeosepta and Protopeneroplis. Loeblich and Tappan included Protopeneroplis (or Ventrolamina, in the Involutinidae in the Treatise Part C, 1964. Archaeosepta was added hence, in 1970.
References[edit]
- ^ Spirillinata, Foraminifera
- ^ Ventrolaminidae Loeblich & Tappan 1988, GSI e-book.