Borehamia toaense (Marwick, 1928)
MARWICK, J. 1928. The Tertiary Mollusca of the Chatham Islands including a generic revision of the New Zealand Pectinidae. Transactions and Proceedings of the New Zealand Institute, 58 (4): 432-506, figs. 1-148. [p. 459, fig. 16]
1928 Sectipecten toaensis Marwick, 1928
J. Marwick, 1928, figures 14-21.
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«Shell rather small for the group, subcircular, somewhat compressed, apical angle 90°, valves almost equal, ears unequal, right valve with 33 strong regular quadrangular ribs separated by interstices of equal width, about 3 weak radial riblets anterior to primaries, interstices and sides of ribs crowded with sharp concentric ridges, near apex are shallow folds so weak that the number is uncertain, left valve with 35 somewhat irregular quadrangular ribs, there are 7 or 8 very weak folds the central one strongest, on summits of these folds the ribs are stronger than in interspaces, anterior ear with 6 sharp rough spaced radials, posterior with 7smooth ones the top two stronger than others.
Height 49 mm.; length 47 mm.; thickness (l.v.) 9 mm., (r.v.) 8 mm. Locality: Momoe-a-toa. Remarks: Related to Sectipecten crawfordi which has the folds well developed and more ribs.» JOHN MARWICK, 1928
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