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Seelya
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Archaeogastropoda? - Suborder Murchisoniina
Superfamily:
Murchisoniacea
Family:
Plethospiridae
Subfamily:
Plethospirinae
Formal Genus Name and Reference:
Seelya Ulrich in Ulrich & SCOFIELD, 1897
Type Species:
S. ventricosa
Images
(Click to enlarge in a new window)
Fig. 192,8. *S. ventricosa, L. Ord., USA(Vt.), X1.3.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Rounder than Plethospira and with raised selenizone, ornament low spiral cords
References
Ulrich, E. O. \& Scofield, W. H., 1897, The Lower Silurian Gastropoda of Minnesota: Minnesota Geol. Survey, v. 3, pt. 2, p. 813-1081, pl. 61-82 (Minneapolis).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Archaeogastropoda? - Suborder Murchisoniina
Superfamily:
Murchisoniacea
Family:
Plethospiridae
Subfamily:
Plethospirinae
Formal Genus Name and Reference:
Seelya Ulrich in Ulrich & SCOFIELD, 1897
Type Species:
S. ventricosa
Images
(Click to enlarge in a new window)
Fig. 192,8. *S. ventricosa, L. Ord., USA(Vt.), X1.3.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Rounder than Plethospira and with raised selenizone, ornament low spiral cords
References
Ulrich, E. O. \& Scofield, W. H., 1897, The Lower Silurian Gastropoda of Minnesota: Minnesota Geol. Survey, v. 3, pt. 2, p. 813-1081, pl. 61-82 (Minneapolis).