Sigmaringenopecten sigmaringensis (Rollier, 1915)
ROLLIER, L. 1915. Fossiles nouveaux ou peu connus des terrains secondaires (Mésozoiques) du Jura et des contrées environnantes. 5. Abhandlungen der Schweizerischen Paläontologischen Gesellschaft / Mémoires de la Société paléontologique suisse, 41: 447-500. [p. 474]
1858 Pecten subarmatus Quenstedt, 1857
1915 Pecten (Aequipecten) sigmaringensis Rollier, 1915
1915 Pecten (Aequipecten) sigmaringensis Rollier, 1915
Pecten subarmatus Goldfuss; F. A. Quenstedt, 1856-1858, Der Jura, plate 92, figures 8, 9.
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«Le 'P.' subarmatus figuré par Quenstedt, Jura (1858), p. 754, 758, t. 92, f. 8-9, du Danubien infér. (W. Jura ξ) des environs de Sigmaringen (Hohraîn) ne répond plus du tout à l'espèce du Crussolien, elle est beaucoup plus aigü (angle apical 88°) sans costules intermédiaires, et portant des écailles coniques, pointues. Je propose de l'appeler P. (Ae.) Sigmaringensis sp. nov. i. f. Qu. P. subarmatus, non Goldf.»
LOUIS ROLLIER, 1915
[Original description from A. L. A. Johonson, 1984] |
«Type species. Pecten (Aequipecten) sigmaringensis Rollier, 1915, p. 474. (= Pecten subarmatus Quenstedt, 1858, p.754, pl. 92, figs. 8-9 (non Munster sp.)]. Upper Kimmeridgian – lower Tithonian of Germany.
Diagnosis. Shell of triangular-rounded outline, slightly elongated in height. Auricles of right valve almost equal, slightly raised above hinge margin. Radial sculpture is represented by 10-12 rectangular costae {ribs}, on which spines are situated. Composition. Monotypic. Comparison. It differs from the closely related Radulopecten Rollier, 1911 in having almost equal auricles raised slightly above hinge margin and rectangular radial costae {ribs}. Range. Kimmeridgian (?) of Azerbaijan (Malyy Kavkaz), upper Kimmeridgian – Tithonian of Germany.» KASUMZADEH, A. A. 2003. Advance in research of mesozoic bivalve mollusks in Azerbaijan (Order Pectinoida: Revision and Systematics). 111 pp. Baku [Translated by Rosanne D’Aprile Johnson, VIARC, Smithsonian Institution]. [p. 54]
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«2. AMENDED DIAGNOSIS
Distinguished from all other species of Radulopecten by the spinose rather than lamellose ornament on the plicae.
3. AMENDED DESCRIPTION
Essentially very similar to R. scarburgensis, differing only by the diagnostic feature (see Section 2; PI. 11, Fig. 5), by the invariant number of original plicae (LV: 11, RV: 12), by the rarity of intercalary plicae and by the smaller maximum size (LMAX: 68; GPIT). H/L and H/UA are plotted in text figs. 201, 202.
4. DISCUSSION
A number of examples of the species described in Section 3 in the GPIT are wrongly labelled Pecten subarmatus MÜNSTER (= Radulopecten scarburgensis), including the specimen (PI. 11, Fig. 6; 1) figured by Quenstedt (1858). The latter formed the basis for 'P. ' ('Aequipecten') Sigmaringensis ROLLIER and becomes ipso facto the holotype (M).
STAESCHE's (1926) record of 'Ae.' subarmatus is discussed under R. scarburgensis.» JOHNSON, A. L. A. 1984. The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe. Zitteliana, 11: 1-235, pls. 1-11. [p. 216]
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Radulopecten sigmaringensis (Rollier 1915); A. L. A. Johnson, 1984, The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe, plate 11, figures 5, 6.
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