Pleurotomaria cf. hettangiensis Terquem, 1855
publication ID |
https://doi.org/ 10.4202/app.2010.0098 |
publication LSID |
lsid:zoobank.org:pub:D91ACB86-86DD-4730-B5CA-4FA96152EEBF |
persistent identifier |
https://treatment.plazi.org/id/03ECFA40-FFA8-1C0E-3F8E-FBBAFE5F00B2 |
treatment provided by |
Felipe |
scientific name |
Pleurotomaria cf. hettangiensis Terquem, 1855 |
status |
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Pleurotomaria cf. hettangiensis Terquem, 1855
Fig. 10E View Fig .
Material.— One specimen: MNHNL BR 432−2, Brouch, Upper Hettangian ( Schlotheimia angulata Zone , Schlotheimia complanata Subzone ).
Dimensions.—See Table 2.
Remarks.—The specimen exhibits strong similarities with the material here assigned to Pleurotomaria hettangiensis Terquem, 1855 . These concern the conical shape of the juvenile shell, the narrow ramp, the elements of the ornament, and the shape and position of the selenizone. It differs from the specimens ascribed here to P. hettangiensis in the narrower spiral angle and the slightly less prominent nodes. These differences are probably due to intraspecific variability. However, there are no intermediate morphs in the present material so that we leave species assignment of this specimen open.
The specimen differs from Pleurotomaria wanderbachi Terquem, 1855 in the shape of the juvenile shell. It is conical with flat whorls almost lacking a ramp, whereas in P. wanderbachi it is definitely gradate.
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