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Clavator
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
Clavator Reid & Groves, 1916, p. 253, emend., HARRIS, 1939, p. 14
Type Species:
C. reidii Groves, 1924, p. 116, SD GROVES, 1924, p. 116
Images
(Click to enlarge in a new window)
Fig. 53,2a-b. *C. reidii Groves, Berriasian, United Kingdom, utricles, lateral views, MPK 8892 and 8895, × 45 (Feist, Lake, & Wood, 1995, pl. I, 11-12).”
Synonyms
Geographic Distribution
USA, Germany, United Kingdom, Switzerland
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Lower Cretaceous (Aptian)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
0
Ending Date:
113.2
Description
Utricle bilaterally symmetrical with 2 calcified layers, inner smooth or nodular, outer made of 12 or fewer elongated vertical or spiralled units, Vegetative apparatus strongly calcified, with central tube surrounded by 12 dextrally coiled cortical tubes composed of alternate long and short units, latter giving rise to clusters of spines that more or less completely cover cortex
References
Groves, James. 1916. On the name Lamprothamnus Braun. Journal of Botany 54:336-337.
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
Clavator Reid & Groves, 1916, p. 253, emend., HARRIS, 1939, p. 14
Type Species:
C. reidii Groves, 1924, p. 116, SD GROVES, 1924, p. 116
Images
(Click to enlarge in a new window)
Fig. 53,2a-b. *C. reidii Groves, Berriasian, United Kingdom, utricles, lateral views, MPK 8892 and 8895, × 45 (Feist, Lake, & Wood, 1995, pl. I, 11-12).”
Synonyms
Geographic Distribution
USA, Germany, United Kingdom, Switzerland
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Lower Cretaceous (Aptian)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
0
Ending Date:
113.2
Description
Utricle bilaterally symmetrical with 2 calcified layers, inner smooth or nodular, outer made of 12 or fewer elongated vertical or spiralled units, Vegetative apparatus strongly calcified, with central tube surrounded by 12 dextrally coiled cortical tubes composed of alternate long and short units, latter giving rise to clusters of spines that more or less completely cover cortex
References
Groves, James. 1916. On the name Lamprothamnus Braun. Journal of Botany 54:336-337.