Turbinolia Lamarck 1816
| Main Author: | Baron-Szabo, Rosemarie C. |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2008
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5241458 |
Daftar Isi:
- Genus Turbinolia Lamarck, 1816 Type species. Turbinolia sulcata Lamarck, 1816, Middle Eocene of France. Diagnosis. Solitary, conical, circular in cross section and small (rarely exceeding 3.5 mm) in diameter. Costae independent in origin, usually well-developed, smooth ridges, and C1–2 sometimes thickened basally. Intercostae present or absent, depending on species; in type species present as alignment of low mounds, becoming low ridges only near calice. Series of circular pits up to 70 μm in diameter flank each costa, each bordered on distal and proximal edges by small thecal buttresses oriented perpendicular to the costa and often fused to the intercostae, if present. Thecal pits thus appear to form a double column, often in alternating arrangement. Septa exsert, hexamerally arranged in 2-4 cycles (12–48 septa). Pali and paliform lobes absent. Columella quite variable, including styliform, stellate, hexameral, and lamellar. Remarks. The diagnosis of this genus is based on the one given by Cairns (1989), who provided re-examinations and detailed discussions regarding the turbinoliids.
- Published as part of Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, pp. 1-244 in Zootaxa 1952 on page 91