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Tolypella
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Tolypella (Braun, 1849) Braun, 1857, p. 338, emend., SOULIÉ-MÄRSCHE, 1989, p. 171
Type Species:
Conferva nidifica MÜLLER, 1778, p. 761, OD
Images
(Click to enlarge in a new window)
Fig. 79a-b. *T. nidifica (O. Müller) Braun, Holocene, Sweden, a, lateral view, b, basal view, x120 (Soulié-Märsche, 1989, pl. XLI, 2, 1)._—_Fig. 79cf. T. pumila Grambast in Stockmans, upper Eocene, Belgium, c, isolated multipartite basal plate, x325, d, lateral view, x110 (Feist & Grambast-Fessard, 1991, fig. 5e, 5d), e, apical view, C.1231-2, f, basal view, C.1231-3, x110 (new).
Synonyms
Geographic Distribution
Alaska, Argentina, Belgium, France, Germany (calcified), worldwide (not calcified)
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (calcified and not calcified)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
lower Oligocene (calcified), Holocene (not calcified)
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
In extant species, oogonia uncalcified, not laterally compressed, with 3 basal sister cells. In fossil species, uncalcified forms unknown; calcified gyrogonites with bipartite or tripartite basal plate. Apex without distinct modifications. General shape spheroidal with apex and base pointed. Spirals concave, smooth. Size very small. [Species with external characters of Tolypella but with basal plate unknown are questionably assigned to this genus, such as the Upper Jurassic T. harrisi MÄDLER, 1952.]
References
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Tolypella (Braun, 1849) Braun, 1857, p. 338, emend., SOULIÉ-MÄRSCHE, 1989, p. 171
Type Species:
Conferva nidifica MÜLLER, 1778, p. 761, OD
Images
(Click to enlarge in a new window)
Fig. 79a-b. *T. nidifica (O. Müller) Braun, Holocene, Sweden, a, lateral view, b, basal view, x120 (Soulié-Märsche, 1989, pl. XLI, 2, 1)._—_Fig. 79cf. T. pumila Grambast in Stockmans, upper Eocene, Belgium, c, isolated multipartite basal plate, x325, d, lateral view, x110 (Feist & Grambast-Fessard, 1991, fig. 5e, 5d), e, apical view, C.1231-2, f, basal view, C.1231-3, x110 (new).
Synonyms
Geographic Distribution
Alaska, Argentina, Belgium, France, Germany (calcified), worldwide (not calcified)
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (calcified and not calcified)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
lower Oligocene (calcified), Holocene (not calcified)
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
In extant species, oogonia uncalcified, not laterally compressed, with 3 basal sister cells. In fossil species, uncalcified forms unknown; calcified gyrogonites with bipartite or tripartite basal plate. Apex without distinct modifications. General shape spheroidal with apex and base pointed. Spirals concave, smooth. Size very small. [Species with external characters of Tolypella but with basal plate unknown are questionably assigned to this genus, such as the Upper Jurassic T. harrisi MÄDLER, 1952.]