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Leptostega

Helcionelloida - Helcionellida - Helcionellidae

Taxonomy
Leptostega was named by Geyer (1986) [Sepkoski's age data: Cm Atda-u Cm mMid-l Sepkoski's reference number: 699,1006].

It was assigned to Cyrtonellida by Bengtson (1992); to Helcionelloida by Sepkoski (2002); to Trenellidae by Parkhaev (2005); and to Helcionellidae by Kouchinsky et al. (2011).

Synonymy list
YearName and author
1986Leptostega Geyer
1992Leptostega Bengtson p. 1027
2002Leptostega Sepkoski, Jr.
2005Leptostega Parkhaev
2011Leptostega Kouchinsky et al. p. 133

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

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
A. Kouchinsky et al. 2011"Internal moulds triangular in lateral view with apex sub-central or slightly inclined, moderately compressed laterally, surface with strong concentric ribs that may alternate on the narrow sides, aperture elliptical (modified from Geyer 1986, p. 84, Bengtson et al. 1990, p. 234 and Parkhaev, 2005, p. 618)."