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Guanacastea
Taxonomy
Guanacastea was named by Pons et al. (2016). Its type is Biradiolites jamaicensis.
It was assigned to Radiolitidae by Pons et al. (2016).
It was assigned to Radiolitidae by Pons et al. (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Guanacastea Pons et al. pp. 228 - 230 |
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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.
G. †Guanacastea Pons et al. 2016
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†Guanacastea costaricaensis Pons et al. 2016
†Guanacastea jamaicensis Trechmann 1924
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.M. Pons et al. 2016 | Radiolitid with conical, elongated RV presenting seven, or a few more, well-developed acute or swollen costae limited by deep furrows. Growth lamellae are deeply inclined inward. The outer shell layer has normal cellular structure and a variably developed compact marginal part. Radial structures are two down-and-outward folds of the growth lamellae with a subdivided distal end; the ventral one is shorter than the posterior. At the outer shell surface, they appear as two very close, short costae and a long costa with a concave distal end, respectively. The interband is limited to a deep furrow. The LV has a concave margin, fitting with the RV folds, and a more or less convex center. There is no ligamental ridge. |