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

Ilsanella

Helcionelloida - Helcionellida - Helcionellidae

Synonyms
Synonymy list
YearName and author
1969Ginella Rozanov et al. pp. 164-165
1976Ginella Runnegar and Jell p. 116
1976Parmophorella Runnegar and Jell p. 117
1981Ilsanella Missarzhevsky p. 123
1989Ilsanella Missarzhevsky p. 171
1992Ilsanella Bengtson p. 1027
1994Ilsanella Wang p. 11
2002Ilsanella Parkhaev p. 34
2002Ilsanella Sepkoski, Jr.
2002Parmophorella Sepkoski, Jr.
2016Ilsanella Jacquet and Brock

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

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
RankNameAuthor
phylumMollusca
classHelcionelloidaPeel 1991
orderHelcionellida
superfamilyHelcionelloidea(Wenz 1938)
familyHelcionellidae
genusIlsanella

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
S. M. Jacquet and G. A. Brock 2016Large cyrtoconic univalve, high to tall profile (H:L ratio ≥0.75 to N1), moderately to slowly expanding, elliptical to sub-rectangular apertural outline, with eccentric apex that rarely projects beyond the sub-apical margin. Adult specimens greater than 10 mm in length. Supra-apical surface evenly convex, sub-apical surface concave directly under the apex, but minimal concavity or almost straight adapically to the apertural margin. Apertural plane straight in lateral view. External ornament consists of wide, uniformly rounded concentric
rugae.