One of the mysteries of the English language finally explained.
Ribbed; possessing a costa.
- ‘In pioneer studies, the genus was confused with some spire-bearing brachiopods because of its strophic outline and costate ribbing.’
- ‘Lateral slopes are weakly costate; the costae are diminished and almost invisible.’
- ‘Early genera were almost circular to elongate-oval, with smooth or finely costate shells.’
- ‘All are radially costate, with costae varying from simple and evenly distributed to variously branched and unevenly spaced.’
- ‘The only other Eurasian finely and densely costate species known to me that is closely comparable is Leptochondria minima from the Lower Triassic of Russia.’
Early 19th century: from Latin costatus, from costa ‘rib’.
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