Mimachlamys crassicostata (G. B. Sowerby II, 1842)
SOWERBY II, G. B. 1842. Monograph of the genus Pecten. In: G. B. Sowerby II (Ed.), 1842-1847, Thesaurus conchyliorum; or, monographs of genera of shells, 1 (2): 45-78, pls. 12-20. London. [p. 75, pl. 15, fig. 111; pl. 17, fig. 152]
1842 Pecten crassicostatus G. B. Sowerby II, 1842
1850 Pecten cristularis Adams & Reeve, 1850
1852 Pecten nobilis Reeve, 1852
1850 Pecten cristularis Adams & Reeve, 1850
1852 Pecten nobilis Reeve, 1852
G. B. Sowerby II, 1842, plate 15.
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«T. sub-rotundatâ, crassâ, sub-aequilaterali, sub-laevi; auriculis inaequalibus, costas squamiferas ferentibus: costis 24 crassis, elevatis, sub-quadratis, annulatis, lateralibus squamiferis. Interstitiis ferè Iaevibus, colore pallidè purpureo, vel aurantiaco, intus albo. Long. 4.50.; lat. 1.50.; alt. 4.30.; poll.
The ribs of this species are much more square and elevated than those of P. senatorius, it is also a thicker and larger shell. Locality unknown.» GEORGE BRETTINGHAM SOWERBY II, 1842
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«A single fragment of a right valve belonging to the portion containing the anterior ear. It is readily distinguishable by numerous equal radiating ribs which are closely scaly.
Fossil occurrence:— Naganuma Zone (Naganuma). Living:— Central and Western Japan; Shangai, Hongkong.» YOKOYAMA, M. 1920. Fossils from the Miura Peninsula and its inmediate North. Journal of the College of Science, Imperial University of Tokyo, 36 (6): 1-193, pls. 1-19, 1 map. [p. 153]
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Pecten crassicostatus, Sowerby; M. Yokoyama, 1920, Fossils from the Miura Peninsula and its inmediate North, plate 12, figure 7.
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«Duo specimina puicherrima exstant alterum unicolor aurantium costis crassis rotundatis 24 squamis erectis latis tenuibus sulcisque paene laevibus, exceptis nonnullis minutim imbricatis instructum, alterum paululum majus et latius colore albescenti marginem versus vivide rubro excellens; costae tantum 22 in eo numerantur.
Pecten crassicostatus e mari Chinensi satis cognitus, colore pervariabili invenitur; modo est unicolor carneus, subroseus, purpurascens, rarius croceus vel aurantius, modo maculis livido-purpureis marmoratus et aspersus. Plerumque altitudo testarum longitudini respondet, interdum vero altitudo longitudinem superat; pariter costarum numerus paulum variabiiis est. A Pectine senatorio haec species testa costisque crassioribus satis differt, sed Pecten nobilis Reevei (Conch. icon. vol. 8. spec. 3.) nostrae speciei tam affinis est, ut eum pro forma tantum gigantea Pectinis crassicostati declaraverim. Inter specimina nostrae collectionis unum exstat permagnum, quod cum icone Reeveana piane congruit et eandem quoque picturam offert. Cum specimina, quae in collectionibus asservantur, plerumque detrita sint et squamis integris careant, in Tabula nostra 13. fig. 28. specimen aurantium illaesum depinximus.» DUNKER, W. 1882. Index Molluscorum Maris Japonici. Casselis Cattorum. Sumptibus Theodori Fischer. 301 p., pls. 1-16. [p. 239, 240]
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Pecten crassicostatus Sowerby var. aurantia; W. Dunker, 1882, Index Molluscorum Maris Japonici, plate 13, figure 28.
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