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Clypeator
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
GRAMBAST, 1962b, p. 69; emend., L. GRAMBAST, 1970, p. 1,967
Type Species:
Perimneste corrugata PECK, 1941, p. 295, pl. 42,15–24; OD
Images
(Click to enlarge in a new window)
FIG. 53,3a–i. *C. corrugatus (PECK) GRAMBAST, Aptian, North America; a–e, different views of one specimen, ×40 (Peck, 1957, pl. 3,1–5); f–g, topotype, ventral, lateral views of same specimen; h–i, basal view, longitudinal section, ×70 (Grambast, 1970, pl. IV,3a–3b,2d,4).——FIG. 53,3j. C. discordis SHAIKIN, Berriasian, Germany; lateral view, CF.2003c-1, ×75 (new).——FIG. 53,3k. C. combei GRAMBAST, Hauterivian, United Kingdom; lateral view, MPK 8906, ×50 (new).
Synonyms
Geographic Distribution
North America, Bulgaria, Germany, United Kingdom, Portugal, Romania, Russia, Spain, China, South Korea.
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:
Lower Cretaceous
(Albian)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
0
Ending Date:
100.5
Description
Utricle bilaterally symmetrical, with 2 opposite shields, each composed of 9 to 13 superficial units radiating from 2 lateral pores. Pores at end of internal canals, generally opening at tip of lateral projections. On 1 or 2 sides, 2 or 3 cells are intercalated between basal cell and lateral pore.
References
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
GRAMBAST, 1962b, p. 69; emend., L. GRAMBAST, 1970, p. 1,967
Type Species:
Perimneste corrugata PECK, 1941, p. 295, pl. 42,15–24; OD
Images
(Click to enlarge in a new window)
FIG. 53,3a–i. *C. corrugatus (PECK) GRAMBAST, Aptian, North America; a–e, different views of one specimen, ×40 (Peck, 1957, pl. 3,1–5); f–g, topotype, ventral, lateral views of same specimen; h–i, basal view, longitudinal section, ×70 (Grambast, 1970, pl. IV,3a–3b,2d,4).——FIG. 53,3j. C. discordis SHAIKIN, Berriasian, Germany; lateral view, CF.2003c-1, ×75 (new).——FIG. 53,3k. C. combei GRAMBAST, Hauterivian, United Kingdom; lateral view, MPK 8906, ×50 (new).
Synonyms
Geographic Distribution
North America, Bulgaria, Germany, United Kingdom, Portugal, Romania, Russia, Spain, China, South Korea.
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:
Lower Cretaceous
(Albian)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
0
Ending Date:
100.5
Description
Utricle bilaterally symmetrical, with 2 opposite shields, each composed of 9 to 13 superficial units radiating from 2 lateral pores. Pores at end of internal canals, generally opening at tip of lateral projections. On 1 or 2 sides, 2 or 3 cells are intercalated between basal cell and lateral pore.