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

Acanthonema holopiforme

Gastropoda - Euomphalina - Euomphalidae

Taxonomy
Acanthonema holopiforme was named by Sherzer and Grabau (1910). Its type specimen is UM 13072, a shell, and it is a 3D body fossil. It is the type species of Acanthonema.

It was corrected as Acanthonema holopiformis by Grabau and Sherzer (1910).

Entered
by P. Wagner on 2006-03-23; modified by P. Wagner on 2013-10-27

Synonymy list
YearName and author
1910Acanthonema holopiformis Grabau and Sherzer pp. 182 - 183 figs. pl 16 f. 4; pl. 23 f. 6, 8; pl. 26f. 1-3
1910Acanthonema holopiforme Sherzer and Grabau p. 549
1941Acanthonema holopiforme Knight p. 29 figs. Plate 51, figures 4a-b
2023Acanthonema holopiforme Wagner p. 2778

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

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassEogastropoda
orderEuomphalina
superfamilyEuomphaloidea()
familyEuomphalidae
genusAcanthonema
speciesholopiforme

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.

†Acanthonema holopiforme Sherzer and Grabau 1910
show all | hide all
Diagnosis
ReferenceDiagnosis
J. B. Knight 1941Small, moderately high-spired, minutely phaneromphalous gastropods with a straight outer lip and a few, nodose revolving ridges; whorl profile gently arched, slightly angular at the revolving ridges; sutures sharply incised but not deep; base rounded, minutely phaneromphalous; nucleus unknown; columellar lip thin, reflexed about the umbilicus; parietal inductura thin; outer lip thin, nearly straight, without a sinus; ornamentation one to three revolving ridges or low carinae carrying small, regular nodes, the uppermost ridge a short distance below the upper suture the best developed and most persistent, the two lower ridges tending to obsolescence; shell structure unknown. The holotype must have measured about 8J mm. in height when complete and about 5 mm. in width with a pleural angle of about 40 degrees.