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Species Acanthoscaphites (Euroscaphites) verneuilianus d'Orbigny 1841 | ||||||
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Machalski (2005): TYPE MATERIAL.- Holotype, by monotypy, is an unregistered specimen (EMP) from the upper lower Maastrichtian at Fresville, Cotentin, France (Kennedy 1986, pl. 16: 15–17). DISCUSSION.- The holotype was described in detail by Ken− nedy (1986: 74). This is an inflated spire c. 47 mm in maxi− mum preserved diameter, with eleven narrow, distant primary ribs on the outer whorl. The primaries are concave at the um− bilical shoulder and straight and prorsiradiate on the flanks. Up to six secondary ribs intercalate between each pair of pri− maries. The secondaries “are set at an acute angle to succeed− ing primary rib, as though they were secondaries arising from adapical face of that primary” (Kennedy 1986: 74). The tuber− culation consists of a maximum of three rows of tubercles: the ventrolaterals, outer laterals (inner ventrolateral tubercles of Kennedy 1986) and siphonal tubercles. The specimen illus− trated by d’Orbigny (1841), presumably lost, is very similar to that claimed to be the holotype by Kennedy (1986). Kennedy (1986) described two other specimens from Cotentin, both incomplete spires, which he regarded to be al− lied to the holotype of A. (E.?) verneuilianus. Of these, Acanthoscaphites sp. of Kennedy (1986: pl. 16: 7–10) is herein referred to as Acanthoscaphites sp. aff. verneuilianus and A. cf. verneuilianus of Kennedy (1986: pl. 16: 20, 21) is thought to be very close to or conspecific with Acantho− scaphites varians blaszkiewiczi (see above). Acanthoscaphites cf. verneuilianus from the Kunrade Limestone facies of the Maastricht Formation (Kennedy 1987: 207, pl. 34: 1) is too poorly preserved for any firm tax− onomic placement. Thus, there are no definitive records of the species outside the Cotentin area. STRATIGRAPHIC RANGE.- Upper lower Maas− trichtian of France (“Inoceramus” morgani Zone). |
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| Systematics: | ||||||
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51 Species Acanthoscaphites (Euroscaphites) Species Acanthoscaphites (Euroscaphites) verneuilianus |
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| Synonym list: | ||||||
| Machalski (2005): 1986 Acanthoscaphites verneuilianus d'Orbigny. - Kennedy : p.74 pl. 16, fig. 15-17;
text-fig. 10c
2005 Acanthoscaphites? (Euroscaphites) verneuilianus d'Orbigny. - Machalski :
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| Stratigraphy - relative ages: | ||||||
| lower Maastrichtian: Machalski (2005) |
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| References: | ||||||
Kennedy,W.J.. (1986): Machalski,M.. (2005): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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