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Ptychocylindrites

Gastropoda - Architectibranchia - Cylindrobullinidae

Taxonomy
Ptychocylindrites was named by Cossmann (1895) [Sepkoski's age data: J Kimm J Tith-u]. It is not extant. Its type is Bulla condati.

It was assigned to Cephalaspida by Sepkoski (2002); and to Cylindrobullinidae by Gründel and Nützel (2012).

Synonymy list
YearName and author
1895Ptychocylindrites Cossmann
2002Ptychocylindrites Sepkoski, Jr.
2012Ptychocylindrites Gründel and Nützel pp. 37 - 38

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassHeterostropha
orderArchitectibranchiaHaszprunar 1985
superfamilyActeonoidead'Orbigny 1835
familyCylindrobullinidaeWenz 1947
genusPtychocylindritesCossmann 1895

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
J. Gründel and A. Nützel 2012The shell is cylindrical to spindle shaped. In lateral view, the last whorl covers all previous whorls. The spire morphology is not well documented; it is seemingly flat to concave and the spire whorls are visible only in apical view. The adapical edge of the whorls is angulated and denticulate. The columella has two folds. The protoconch is unknown.