Neithea syriaca (Conrad, 1852)
CONRAD, T. A. 1852. Description of the fossils of Syria, collected in the Palestine Expedition. In: W. F. Linch, 1852, Official Report of the United States Expedition to explore the Dead Sea and the River Jordan, 211-235, pls. 1-22 (Appendix). Ed. John Murphy & Co., Baltimore [p. 230, pl. 1, fig. 6 (Appendix)]
1852 Janira syriaca Conrad, 1852
1858 Janira morrisi Pictet & Renevier, 1858
1866 Janira matheroniana Loriol, 1866
1909 Janira daghestanica Rengarten, 1909
1955 Neithea coxi Mahmoud, 1955
1858 Janira morrisi Pictet & Renevier, 1858
1866 Janira matheroniana Loriol, 1866
1909 Janira daghestanica Rengarten, 1909
1955 Neithea coxi Mahmoud, 1955
T. A. Conrad, 1852,
plate 1 (Appendix) |
«Janira Syriaca, PI. 1, fig. 6. Subtriangular, elevated; superior valve slightly concave, with rather narrow, unequal ribs and concentrically wrinkled, about twenty-six in number; inferior valve ventricose, with six large ribs, rounded and finely wrinkled; intervals with generally four rounded unequal ribs.
The genus Janira, according to d'Orbigny, commenced with the Cretaceous period, which is characterised by numerous species, and the Janira Syriaca may possibly belong to that era; but as it accompanied a group of exclusively Jurassic fossils, and its matrix is apparently of the same mineral character with that of the latter, I have supposed it to be Jurassic and arranged it accordingly. Local.: 'Abeih.» TIMOTHY ABBOT CONRAD, 1852
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«Synonymy.— As PICTET et RENEVIER stated many N. quinquecostata of older authors belong effectively to N. syriaca; this does however not go as far as these two authors tried to show. N. syriaca (CONRAD) as described and figured by H. VOKES is certainly synonymous with N. morrisi (PICTET et RENEVIER): the presence or absence of an areal fold is not a specific characteristic: in the same locality specimens with and without fold are found.
N. coxi MAHMOUD differs from N. syriaca, according to the author, in the following points: "Ces échantillons sont bien voisins de I'espéce N. morrisi PICTET et RENEVIER. Seulement, la partie du test comprise entre les cótes principales externes et le bord de la coquille, au lieu d'étre lisse et dépourvue de toute sorte de cótes rayonnantes, comme chez N. morrisi, et au lieu d'étre complétement costulée (avec plusieurs costules intercalaires), comme chez N. quinquecostata SOW., montre au contraire une seule costule large [pl. VI, fig. 46 (sic, 1.c. for 4 b)] mais moins bien individualisée que celles situées entre les cótes principales." This differential character is not a properly differential character as can be read in the description of PICTET et RENEVIER who already mentioned "un léger pli costiforme peu apparent". Janira matheroniana P. DE LORIOL, 1866 (p. 83, pl. E, fig. 9) from the Urgonien (Barremian) of Grand-Saléve, au-dessus d'Essert (Haute Savoie, France) is known from a very poorly preserved specimen in the Muséum d'Histoire naturelle in Geneva: it has smooth areas and very salient principal ribs and four unequal intercalaries, of which the two middle ones are the more developed. It is thus undoubtedly closely related to N. syriaca but whether both species are synonymous cannot be decided on such incomplete material.» DHONDT, A. V. 1973. Systematic revision of the subfamily Neitheinae (Pectinidae, Bivavia, Mollusca) of the European Cretaceus. Mémoires du Institute Royal des Sciences Naturelles de Belgique, 176: 1-101, pls. 1-5. [p. 39]
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Neithea (Neithea) syriaca (Conrad, 1852); A. V. Dhondt, 1973, Systematic revision of the subfamily Neitheinae of the European Cretaceus, plate 5, figures 3a, 3b.
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