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Gavelinella
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Anomalinidae
Subfamily:
Anomalininae
Formal Genus Name and Reference:
Gavelinella BROTZEN, 1942, *240, p. 7
Type Species:
Discorbina pertusa MARSSON, 1878, *1228, p. 166, OD
Images
(Click to enlarge in a new window)
Fig. 621,5. *G. pertusa (Marsson), U.Cret. (Maastricht.), Eu. (Denm.), 5a-c, opp. sides and edge view, X98 (*2117). -- Fig. 621,6. G. lorneiana (d'Orbigny), U.Cret.(Senon.), Eu.(Fr.), 6a-c, opp. sides and edge view of lectotype, X61 (*2117). -- Fig. 621,7. G. monterelensis (Marie), U.Cret. (Campan.), USSR, 7a-c, opp. sides and edge view, X38 (*265)
Synonyms
Geographic Distribution
Eu.-N. Am.-S. Am.-Australia-N. Z.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test free, trochospiral, biconvex, sides flattened, periphery rounded, all whorls visible on spiral side, on opposite side only chambers of final whorl visible around umbilicus, which is partially closed by subtriangular flaps projecting from umbilical margins of each chamber, small umbilical boss may also be present, wall calcareous, perforate, granular in structure with double septal walls (bilamellar), aperture a low interiomarginal slit extending from near periphery to umbilicus, bordered above by narrow lip which broadens out into triangular flap at umbilical chamber margin, aperture continuous beneath flap with those of earlier chambers.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Anomalinidae
Subfamily:
Anomalininae
Formal Genus Name and Reference:
Gavelinella BROTZEN, 1942, *240, p. 7
Type Species:
Discorbina pertusa MARSSON, 1878, *1228, p. 166, OD
Images
(Click to enlarge in a new window)
Fig. 621,5. *G. pertusa (Marsson), U.Cret. (Maastricht.), Eu. (Denm.), 5a-c, opp. sides and edge view, X98 (*2117). -- Fig. 621,6. G. lorneiana (d'Orbigny), U.Cret.(Senon.), Eu.(Fr.), 6a-c, opp. sides and edge view of lectotype, X61 (*2117). -- Fig. 621,7. G. monterelensis (Marie), U.Cret. (Campan.), USSR, 7a-c, opp. sides and edge view, X38 (*265)
Synonyms
Geographic Distribution
Eu.-N. Am.-S. Am.-Australia-N. Z.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test free, trochospiral, biconvex, sides flattened, periphery rounded, all whorls visible on spiral side, on opposite side only chambers of final whorl visible around umbilicus, which is partially closed by subtriangular flaps projecting from umbilical margins of each chamber, small umbilical boss may also be present, wall calcareous, perforate, granular in structure with double septal walls (bilamellar), aperture a low interiomarginal slit extending from near periphery to umbilicus, bordered above by narrow lip which broadens out into triangular flap at umbilical chamber margin, aperture continuous beneath flap with those of earlier chambers.