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

Araeonema virgatum

Gastropoda - Euomphalina - Euomphalidae

Taxonomy
Araeonema virgatum was named by Knight (1933). It is not extant. Its type locality is SL-1. Headwaters of Feefee Creek, north of Olive St. & west of Lindberg Blvd., 1.5 km northwest of Stratmann (Olivette), which is in a Moscovian marine shale in the Appanoose Formation of Missouri.

Synonymy list
YearName and author
1933Araeonema virgatum Knight
1941Araeonema virgatum Knight p. 42 figs. Plate 54, figures 3
2017Araeonema virgatum Wagner p. 5798

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassEogastropoda
orderEuomphalina
superfamilyEuomphaloidea()
familyEuomphalidae
genusAraeonema
speciesvirgatum

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. B. Knight 1941Very small, subturbinate, minutely phaneromphalous gastropods, without a sinus, slit, or selenizone; whorl profile gently arched between sutures, rounded below on the final whorl; sutures moderately deep; nucleus simple, dextral, not sharply marked off from the succeeding whorls; base rounded, minutely phaneromphalous; columellar lip thin, gently arcuate, slightly reflexed about the umbilicus; parietal inductura very thin or wanting; outer lip gently oblique backwards from the upper suture, nearly straight; ornamentation fine revolving lirae that are frequently of unequal strength owing to the intercalation of new lirae on the later whorls; shell thin, of two distinctly different layers. The holotype measures about 3 mm. in height and 2.2 mm. in width, with a pleural angle of about 41 degrees.