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Helcionelloidea

Helcionelloida - Helcionellida

Synonymy list
YearName and author
1938Helcionellacea Wenz
1960Helcionellacea Knight et al. p. 172
1975Helcionelloidea Golikov and Starobogatov p. 207
1976Helcionellacea Runnegar and Jell p. 116
1990Helcionellacea Runnegar p. 234
1992Helcionellacea Wahlman
2001Helcionelloidea Parkhaev p. 136
2002Helcionelloidea Parkhaev p. 34
2004Helcionellacea Atkins and Peel p. 3
2004Helcionelloidea Parkhaev p. 594
2010Helcionelloidea Parkhaev and Demidenko p. 1007
2017Helcionelloidea Wagner

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

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. Yu. Parkhaev 2001Helcionelliformes without siphonal groove of the posterior margin of the aperture.
P. Y. Parkhaev and Y. Demidenko 2010"Siphonal groove absent from posterior apertural margin."