Papposilenus utriculus, DeVries, 2019
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publication ID |
https://doi.org/ 10.1080/00222933.2018.1524032 |
|
DOI |
https://doi.org/10.5281/zenodo.3671204 |
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persistent identifier |
https://treatment.plazi.org/id/03BB2338-E354-E226-FE75-A3245E88FEB4 |
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treatment provided by |
Valdenar |
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scientific name |
Papposilenus utriculus |
| status |
sp. nov. |
Papposilenus utriculus sp. nov.
( Figure 4 View Figure 4 (u, v, x))
Diagnosis
Characters as for genus; two anterior spiral cords on earliest teleoconch whorls unbeaded.
Description
Estimated shell length about 30 mm, stoutly conical, spire angle about 35°. Protoconch unknown. Spire with about nine whorls. Whorls flat-sided or slightly convex, sutures thinly incised, recessed. All preserved whorls with three spiral cords. Posteriormost spiral cord strongest, beaded on very early whorls, beads rhombohedral, flattened or nodular, with long axis parallel to shell axis and sides prosocline. Two anterior spiral cords slightly narrower, equal in size to each other, divided by thin incision on early whorls, not beaded. Last three or four whorls with all cords fully beaded; beads aligned, producing orthocline to slightly prosocline axial groove, broadly sulcate medially. Spire varices absent. Base poorly preserved; with at least four unbeaded or weakly beaded spiral cords separated by equally wide interspaces. Columella without folds. Outer lip flared from posterior attachment point but mostly not preserved. Anterior canal strongly recurved but mostly not preserved.
Remarks
Specimens of the early Eocene Papposilenus utriculus sp. nov. differ in few respects from the widely distributed Miocene P. suprasulcatus . The Eocene species usually has a more strongly opisthocyrt growth line, wider interspaces between the beaded cords, and beads that are more spirally elongate.
Etymology
‘ Utriculus ’, wineskin, a leather bag made from goat hide used to dispense wine; its profile is like that of the shell of Papposilenus .
Material
UWBM 107589 , holotype, B8772 (type locality), L (25.5), W (15.0) ; remainder are paratypes: UWBM 107590 , B8770, L (17.6), W (12.5); UWBM 107592, B8772, L (18.7), W (12.0);
MUSM INV 253, B8770, L (25.3), W (12.9); MUSM INV 254, B8769, L (22.6), W (12.9).
Occurrence
Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.
| UWBM |
University of Washington, Burke Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.