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Rolumbus hilarus
Original description: Cephalis large, hemispherical, imperforate, covered with layer of microgranular silica. Two horns widely displaced, thin to medium in thickness, short, triradiate in axial section with three narrow grooves alternating with three medium width ridges. Thorax large, ellipsoidal to subhemispherical in outline. Mesh work of thorax double-layered with small triangular or tetragonal pore frames superimposed by large circular pore frames. Four feet relatively massive, elongate, originating from upper portion of thorax. Feet triradiate in axial section with three narrow ridges alternating with three wide grooves. Aperture large, subcircular in outline.
Original remarks: Rolumbus hilarus, n. sp., can be distinguished from other Rolumbus spp. in this report by having a thorax with a double-layered test wall, and by having short horns which are widely displaced.
Etymology: Hilarus-a-um (Latin, adj.) cheerful.
| Year | Name and author |
|---|---|
| 1987 | Rolumbus hilarus Yeh p. 77 figs. Pl. 25, figs. 8, 10, 19 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.