|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Helcionelloida - Pelagiellida - Pelagiellidae
It was assigned to Pelagiellacea by Knight et al. (1960), Runnegar and Jell (1976) and Missarzhevsky (1989); to Pelagiellida by Runnegar (1990); to Pelagielliformes by Parkhaev (2001); and to Pelagielloidea by Linsley and Kier (1984), Landing et al. (2002) and Bouchet et al. (2005).
|Year||Name and author|
|1960||Pelagiellidae Knight et al. p. 323|
|1976||Pelagiellidae Runnegar and Jell p. 133|
|1984||Pelagiellidae Linsley and Kier|
|1989||Pelagiellidae Missarzhevsky p. 182|
|1990||Pelagiellidae Runnegar p. 252|
|2001||Pelagiellidae Parkhaev p. 191|
|2002||Pelagiellidae Landing et al. p. 299|
|2005||Pelagiellidae Bouchet et al. p. 241|
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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.
|P. Yu. Parkhaev 2001||The Pelagielliformes with turbospiral shell. Its asymmetry is mostly achieved by the projection of the basal (left) side of the last whorl. The spire is hardly projected.|