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Igorella

Helcionelloida - Helcionellida - Helcionellidae

Synonyms
Synonymy list
YearName and author
1878Diana Clessin
1969Igorella Rozanov et al. pp. 166-167
1976Igorella Runnegar and Jell p. 117
1979Maidipingoconus
1981Songlinella Chen et al.
1981Chabaktiella Missarzhevsky and Mambetov p. 50
1989Igorellina Missarzhevsky
1989Igorella Missarzhevsky p. 172
1989Igorellina Missarzhevsky p. 175
1989Chabaktiella Missarzhevsky p. 177
1992Igorella Bengtson p. 1027
1994Dianella Wang
1994Igorella Wang p. 12
1994Dianella Wang p. 13
1998Bemellina Vassiljeva p. 77
1998Compressoconus Vassiljeva p. 79
2000Igorella Feng et al. p. 373
2002Igorella Parkhaev p. 34
2002Igorellina Parkhaev p. 34
2002Chabaktiella Parkhaev p. 35
2002Dianella Sepkoski, Jr.
2002Igorella Sepkoski, Jr.
2002Igorellina Sepkoski, Jr.
2002Maidipingoconus Sepkoski, Jr.
2010Igorella Parkhaev and Demidenko p. 1028

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

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
P. Y. Parkhaev and Y. Demidenko 2010"Shell cap-shaped, high, considerably compressed laterally. Apex inclined and displaced posteriorly, significantly projecting over posterior apertural margin. Anterior field convex, posterior field concave and relatively long. Aperture oval or elliptical, simple, without sinuses or flaring. Ornamentation represented by concentric folds or ribs developed to different extent, rarely radial ribs or striation can be present."