clavulinopsis (foram) clavulinopsis (foram) 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. clavulinopsistemporal 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: clavulinopsisbanner 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.