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Morphology Ecology and taphonomy   Age range and collections

Trianglaspira

Gastropoda - Coelostylinidae

Taxonomy
Trianglaspira was named by Pan (1982) [Sepkoski's age data: J l Sepkoski's reference number: ZR82].

It was assigned to Coelostylinidae by Pan (1982); and to Neotaenioglossa by Sepkoski (2002).

Synonymy list
YearName and author
1982Trianglaspira Pan pp. 58, 109
2002Trianglospira Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
RankNameAuthor
phylumMollusca
classGastropodaCuvier 1797
superorderHypsogastropoda(Ponder and Lindberg 1997)
familyCoelostylinidaeCossmann 1909
genusTrianglaspira

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
H. Z. Pan 1982Shell small in size, roundly-ovate to conically ovate in outline, having 4—5 whorls, Apex sharp and spire conical, the early whorls increase slowly, but the last whorl is rapidly and distinctly dilated, subcircular. Suture distinctly visible, near aperture bearing a strongly sutural groove, upper side of the aperture having a slightly convex triangular area, base convex, anomphalous or umbilical fissure. Aperture ovate-oblong in shape, the smooth surface is ornamented by fine spiral lines and fine growth lines.