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Amblyochara
Classification
Phylum:
Class:
Order:
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Amblyochara GRAMBAST, 1962b, p. 79
Type Species:
A. begudiana GRAMBAST, 1962b, p. 79, fig. 4, OD
Images
(Click to enlarge in a new window)
Fig. 64,2a-c. *A. begudiana Grambast, Upper Cretaceous, France, topotypes, a, lateral view, C.45046, b, apical view, C.450-47, c, basal view, C.450-48, x40 (new).——Fig. 64,2d. A. rolli (Косн & Blissenbach) Grambast, Upper Cretaceous, Chile, lateral view, C.1223-1, ×40 (new).
Synonyms
Geographic Distribution
Europe, USA, South America (widespread), South Korea, Mongolia, China
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:
Neogene (Pliocene)
Ending International Stage:
Piacenzian
Fraction Up In Ending Stage:
0
Ending Date:
2.58
Description
Apex psilocharoid, with spirals retaining their width but tending to flatten as they turn onto summit, General shape subovoid with apical part gently rounded or slightly projecting, base tapered, basal pore at end of funnel-shaped depression, basal plate parallelepidal shaped, being generally less high than one-quarter of width, Size medium to large. [Genus differs from Rhabdochara, which has a more flattened apex and a conical and hollow basal plate, and from Lychnothamnus, whose gyrogonites present a periapical groove and a thicker basal plate.]
References
Museum or Author Information
Classification
Phylum:
Class:
Order:
Superfamily:
Unknown
Family:
Characeae
Formal Genus Name and Reference:
Amblyochara GRAMBAST, 1962b, p. 79
Type Species:
A. begudiana GRAMBAST, 1962b, p. 79, fig. 4, OD
Images
(Click to enlarge in a new window)
Fig. 64,2a-c. *A. begudiana Grambast, Upper Cretaceous, France, topotypes, a, lateral view, C.45046, b, apical view, C.450-47, c, basal view, C.450-48, x40 (new).——Fig. 64,2d. A. rolli (Косн & Blissenbach) Grambast, Upper Cretaceous, Chile, lateral view, C.1223-1, ×40 (new).
Synonyms
Geographic Distribution
Europe, USA, South America (widespread), South Korea, Mongolia, China
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:
Neogene (Pliocene)
Ending International Stage:
Piacenzian
Fraction Up In Ending Stage:
0
Ending Date:
2.58
Description
Apex psilocharoid, with spirals retaining their width but tending to flatten as they turn onto summit, General shape subovoid with apical part gently rounded or slightly projecting, base tapered, basal pore at end of funnel-shaped depression, basal plate parallelepidal shaped, being generally less high than one-quarter of width, Size medium to large. [Genus differs from Rhabdochara, which has a more flattened apex and a conical and hollow basal plate, and from Lychnothamnus, whose gyrogonites present a periapical groove and a thicker basal plate.]