Costellamussiopecten cristatus (Bronn, 1827)
BRONN, H. G. 1827. Verzeichnifs der bei dem Heidelberger Mineralien - Komptoir verkäuflichen Konchylien - Pflanzenthier - und andern Versteinerungen. Mineralogisches Taschenbuch [Leonhard's Jahrbuch für Mineralogie], 8: 529-544. [p. 542]
1827 Pecten cristatus Bronn, 1827 [nomen nudum]
Pecten cristatus Bronn; A. Goldfuss, 1833-1840, Petrefacta Germaniae, plate 99, figures 13a-13d.
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«238 — cristatus nob.»
HEINRICH GEORG BRONN, 1827
«664. ! cristatus BRN. n. 238
Ostrea pleuronectes (LIN.) BRCH. 573 (Cq. c. 260 / An. c. / Ni Sy. Tpscana) [Non LIN] P. pleuronectes var. DF. 38. 253 P. pleuronectes RI. IV. 300; ? SE. 131 P. testa subaequivalvi aequilatera, tenui, orbiculari, compressa, extus laevi, intus a centro ad limbum costis 26 - 32 radiata; margine cardinali valvae alterius recto, simplici, alterius cristato - crenato, media incurvo. Besonders durch den Schlofsrand von P. Japonicus verschieden, welcher überdiefs bis 50 Strahlen hat. Höhe und Breite 40'", Dicke 11'". ? Fossil auch in Süd-Frankreich (c).» BRONN, H. G. 1831. Italiens Tertiär-Gebilde und deren organische Einschlüsse. xii, 176 p. Karl Groos, Heidelberg. [p. 116]
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«Description: Shell of medium size, almost equivalve and equilateral, circular outline with the height equal or slightly less than the length of the shell (Table 1). The valves of articulated specimens are not hermetically closed but have openings in the posterior auricles (auricular gape) and in the posterior margin near the auricles (disk gape).
Right valve weakly concave, smooth and shining outer surface with very delicate growth lines. Anterior auricle similar to the posterior one. Margin of the auricles oblique, the posterior margin more inclined than the anterior one. Auricles covered with growth lines that protrude beyond the cardinal margin to produce small spines. The cardinal margin forms an obtuse angle with the umbo. The inner surface of the valve is covered by 24-28 regularly spaced radial ribs. The left valve is similar to the right one. It is slightly convex, with a smooth outer surface with very fine growth lines. Auricles similar in size (Table 1) obliquely truncated and ornamented with growth lines. Cardinal margin straight with no spines. The inner surface of the valve has the same number of radial ribs as the right valve. Remarks: The juvenile stages of Amusium cristatum are very similar to Korobkovia oblonga (Philippi, 1844). Notwithstanding, K. oblonga is smaller, with an oval outline, has smaller auricles, with no spines in the cardinal margin of the right valve, and with no ribs in the inner surface of the valves.
Localities and facies: A. cristatum is very abundant in the silts and fine-grained sands of the three study areas, especially in the Almería-Níjar Basin, where it forms dense concentrations in 5 to 10 cm beds, as commented in the introduction section.»
JIMÉNEZ, A. P., J. AGUIRRE & P. RIVAS. 2009. Taxonomic study of scallops (Pectinidae: Mollusca, Bivalvia) from Pliocene deposits (Almería, SE Spain). Revista Española de Paleontología, 24 (1): 1-30, figs. 1-9. [p. 15]
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Amusium cristatum (Bronn, 1827); A. P. Jiménez, J. Aguirre & P. Rivas, 2009, Taxonomic study of scallops from Pliocene deposits, figures 6a, 6b.
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