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Mesochara
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Mesochara Grambast, 1962b, p. 78, Piriformachara Liu & WU, 1985, p. 147
Type Species:
Praechara symmetrica РЕСК, 1957, p. 39, pl. 7, 13-16, OD
Images
(Click to enlarge in a new window)
Fig. 71,2a-b. *M. symmetrica (Реск) Grambast, Lower Cretaceous, USA, topotypes, a, lateral view, C.1225-1, b, apical view, C.1225-1, × 80 (new)., Fig. 71,2c. M. fusiformis Feist, Upper Cretaceous, France, holotype, lateral view, × 80 (Feist, 1981, fig. 4g).
Synonyms
Piriformachara
Geographic Distribution
USA, Argentina, France, Moldavia, Ukraine, China, Mongolia, Tanzania
Age Range
Beginning Stage in Treatise Usage:
Cretaceous
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
0
Ending Date:
66.04
Description
Apex psilocharoid, with apical spiral endings not enlarged or only slightly enlarged, General shape subprolate, with apex rounded or pointed and base thinner, Gyrogonites unornamented, Size small to medium. [Differs from Amblyochara mainly in size and from Chara by absence of enlargement (or having only minor enlargement) of the apical spiral endings and having fewer convolutions, Piriformachara differs from Mesochara only by its spiral convexity, a character that may depend on the degree of calcification and cannot be alone considered as a generic criterion.]
References
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Mesochara Grambast, 1962b, p. 78, Piriformachara Liu & WU, 1985, p. 147
Type Species:
Praechara symmetrica РЕСК, 1957, p. 39, pl. 7, 13-16, OD
Images
(Click to enlarge in a new window)
Fig. 71,2a-b. *M. symmetrica (Реск) Grambast, Lower Cretaceous, USA, topotypes, a, lateral view, C.1225-1, b, apical view, C.1225-1, × 80 (new)., Fig. 71,2c. M. fusiformis Feist, Upper Cretaceous, France, holotype, lateral view, × 80 (Feist, 1981, fig. 4g).
Synonyms
Piriformachara
Geographic Distribution
USA, Argentina, France, Moldavia, Ukraine, China, Mongolia, Tanzania
Age Range
Beginning Stage in Treatise Usage:
Cretaceous
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
0
Ending Date:
66.04
Description
Apex psilocharoid, with apical spiral endings not enlarged or only slightly enlarged, General shape subprolate, with apex rounded or pointed and base thinner, Gyrogonites unornamented, Size small to medium. [Differs from Amblyochara mainly in size and from Chara by absence of enlargement (or having only minor enlargement) of the apical spiral endings and having fewer convolutions, Piriformachara differs from Mesochara only by its spiral convexity, a character that may depend on the degree of calcification and cannot be alone considered as a generic criterion.]