Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Striactaeonina

Gastropoda - Architectibranchia - Tubiferidae

Synonymy list
YearName and author
2002Striactaeonina Sepkoski, Jr.
2012Striactaeonina Gründel and Nützel p. 41
2013Striactaeonina Schulbert and Nützel p. 766

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

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 has a cylindrical to oval shape with distinctly elevated spire. The last whorl is moderately convex and not inflated. The whorls have a subsutural ramp which is oblique in most cases. The ramp is demarcated from whorl face by a spiral furrow. Spiral striae (fine furrows) are present at least on base but also on whorl flanks in many cases. The growth lines are prosocyrt and curving backward in their adapical portion. The aperture is drop-shaped, acute posteriorly and rounded anteriorly. The whorls embrace well below the ramp. The outer lip is convex. The inner lip shows a convex parietal and concave columellar portion. The protoconch is medio- to transaxial.