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Conicospirillina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Spirillinacea
Family:
Spirillinidae
Subfamily:
Spirillininae
Formal Genus Name and Reference:
Conicospirillina CUSHMAN, 1927, *431, p. 73
Type Species:
Spirillina trochoides BERTHELIN, 1879, *132, p. 37, OD
Images
(Click to enlarge in a new window)
Fig. 475,5. *C. trochoides (BERTHELl"), L.Jur.(L.Pliensbach.), Eu.(Fr.); 5a-c, opposite sides and edge view of topotype, X257 (*2117)
Synonyms
Geographic Distribution
Eu.-AtI.O.-Pac.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, conical, consisting of proloculus and undivided tubular spiraling second chamber, spiral side convex and evolute, umbilical side concave and nearly completely involute, final whorl nearly or completely overlapping all previous whorls, rarely leaving small open umbilicus, aperture at open end of tube on umbilical side. [Differs from Spirillina in being ventrally involute and in being conical in form. It differs from Turrispirillina in its involute ventral side with the final whorl occupying the entire ventral side.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Spirillinacea
Family:
Spirillinidae
Subfamily:
Spirillininae
Formal Genus Name and Reference:
Conicospirillina CUSHMAN, 1927, *431, p. 73
Type Species:
Spirillina trochoides BERTHELIN, 1879, *132, p. 37, OD
Images
(Click to enlarge in a new window)
Fig. 475,5. *C. trochoides (BERTHELl"), L.Jur.(L.Pliensbach.), Eu.(Fr.); 5a-c, opposite sides and edge view of topotype, X257 (*2117)
Synonyms
Geographic Distribution
Eu.-AtI.O.-Pac.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, conical, consisting of proloculus and undivided tubular spiraling second chamber, spiral side convex and evolute, umbilical side concave and nearly completely involute, final whorl nearly or completely overlapping all previous whorls, rarely leaving small open umbilicus, aperture at open end of tube on umbilical side. [Differs from Spirillina in being ventrally involute and in being conical in form. It differs from Turrispirillina in its involute ventral side with the final whorl occupying the entire ventral side.]