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Peckisphaera
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Peckisphaera GRAMBAST, 1962b, p. 78
Type Species:
Chara verticillata PECK, 1937, p. 84, fig. 30–33; OD
Images
(Click to enlarge in a new window)
FIG. 74,1a–c. *P. verticillata (PECK) GRAMBAST, Upper Jurassic, USA, topotypes; a, lateral view, C.1228-1, ×80; b, basal view, C.1228-2, ×72; c, apical view, C.1228-3, ×72 (new).——FIG. 74,1d. P. (Retusochara) macrocarpa (GRAMBAST) FEIST & GRAMBAST-FESSARD, Upper Cretaceous, France; longitudinal section, ×40 (Grambast, 1971, pl. XXV,8).
Synonyms
Circonitella, Retusochara
Geographic Distribution
USA, Argentina, France, Germany, Portugal, Spain, Ukraine, China, Lebanon
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
0
Ending Date:
66.04
Description
Apex psilocharoid, without distinct apical modifications of spirals but with slight enlargement at ends. General shape prolate-spheroidal to subprolate with apex rounded. Spirals smooth. Basal plate thick, the thickness up to twice width, visible or not from exterior. Size small to large. [Retusochara and Peckisphaera have similar apical structures and thick basal plates; plate is sunken in Retusochara but in some species is still visible from the exterior.]
References
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Peckisphaera GRAMBAST, 1962b, p. 78
Type Species:
Chara verticillata PECK, 1937, p. 84, fig. 30–33; OD
Images
(Click to enlarge in a new window)
FIG. 74,1a–c. *P. verticillata (PECK) GRAMBAST, Upper Jurassic, USA, topotypes; a, lateral view, C.1228-1, ×80; b, basal view, C.1228-2, ×72; c, apical view, C.1228-3, ×72 (new).——FIG. 74,1d. P. (Retusochara) macrocarpa (GRAMBAST) FEIST & GRAMBAST-FESSARD, Upper Cretaceous, France; longitudinal section, ×40 (Grambast, 1971, pl. XXV,8).
Synonyms
Circonitella, Retusochara
Geographic Distribution
USA, Argentina, France, Germany, Portugal, Spain, Ukraine, China, Lebanon
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
0
Ending Date:
66.04
Description
Apex psilocharoid, without distinct apical modifications of spirals but with slight enlargement at ends. General shape prolate-spheroidal to subprolate with apex rounded. Spirals smooth. Basal plate thick, the thickness up to twice width, visible or not from exterior. Size small to large. [Retusochara and Peckisphaera have similar apical structures and thick basal plates; plate is sunken in Retusochara but in some species is still visible from the exterior.]