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Horderleyella chacaltanai
Taxonomy
Horderleyella chacaltanai was named by Villas et al. (2015). Its type specimen is CPI 6561, a valve (Internal mould of dorsal valve), and it is a 3D body fossil. Its type locality is Ticara Creek C3, which is in a Burrellian marine sandstone in the Calapuja Formation of Peru.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Horderleyella chacaltanai Villas et al. fig. 10–11 |
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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.
†Horderleyella chacaltanai Villas et al. 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Villas et al. 2015 | Shell slightly mucronate in young stages to transversely subquadrate in adults, coarsely fascicostellate, with 9–11 ribs per 5 mm at 5 mm anteromedially from umbo; diamond-shaped ventral muscle field; brachiophores bladelike, projecting anterolaterally from notothyrial platform, not attached to valve floor and overhanging adductor scars. |