Clavulinopsis (foram)
Extinct genus of single-celled organisms
| Clavulinopsis Temporal range: Late Cret (Camp - Maastr) | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| (unranked): | SAR |
| (unranked): | Rhizaria |
| Superphylum: | Retaria |
| Phylum: | Foraminifera |
| Class: | Globothalamea |
| Order: | Textulariida |
| Superfamily: | Textulariacea |
| Family: | Pseudogaudryinidae |
| Genus: | Clavulinopsis Banner and Desai, 1985 |
Clavulinopsis is a genus of foraminifera from the Upper Cretaceous of the United States (Texas, Arkansas), included in the Textulariida. The type species is Clavulinopsis hofkeri Banner and Desai, 1985.
Clavulinopsis has a free aggulinated test with a considerable calcareous groundmass. The early stage is triserial, later abruptly becoming uniserial; cross section triangular. Sutures are slightly depressed, horizontal to slightly arched at the center of the flattened sides. Lateral walls are filled with fine micro-tubular cavities (term: canaliculate) that open into the chamber interiors, but are sealed externally by a finely agglutinated outer layer. Septa are solid, without micro-tubular cavities. The aperture is cribrate, with irregular pores at the end of a slightly produced neck.
