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Nodosoclavator
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
Nodosoclavator MAsLov, 1961, p. 679, emend., GRAMBAST, 1966c, p. 269
Type Species:
*Clavator nodosus РЕСК, 1957, p. 15, pl. 8, 3-18, OD
Images
(Click to enlarge in a new window)
Fig. 57,1a-b. *N. nodosus (Реск) Maslov, Aptian, North America, a, holotype, lateral view, b, paratype, lateral view, x60 (Peck, 1957, pl. 8,5-6), Fig. 57, 1c-d. N. adnatus Martin-Closas & Grambast-Fessard, Barremian, Spain, c, lateral view with part of branchlet, x50, d, interpretation of external utricle structure in connection with branchlet, x50 (Martin-Closas & GrambastFessard, 1986, pl. II,10, text-fig. 4)
Synonyms
Geographic Distribution
USA, France, Germany, United Kingdom, Portugal, Spain, Switzerland, Ukraine, China, Algeria
Age Range
Beginning Stage in Treatise Usage:
Nodosoclavator is
one of the oldest representatives of the Clavatoraceae
family. Upper Jurassic (Oxfordian)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
Lower Cretaceous (Aptian)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
0
Ending Date:
113.2
Description
Utricle with external layer restricted to basal portion of gyrogonite, nodular layer with tubercles well developed and irregularly disposed or more or less aligned with spirals and covering gyrogonite, Gyrogonites strongly beaked by abrupt upturn of spiral units at distal ends, Vegetative parts commonly preserved at base of utricle. [Nodosoclavator differs from Clavator in that outer structural layer is restricted to the basal part of the utricle or even missing. The nodosoclavatoroid utricles (SCHUDACK, 1989) are incompletely developed utricles of other Clavatoroideae, which may represent the Nodosoclavator stage and do not put the validity of the genus in question.]
References
Maslov, Vladimir Petrovich. 1961. Ne iavliaiutsia li Sitsidii i Khovanelly utrikulami kharophytov? [Are Sycidium and Chovanella not the utricles of charophytes?]. Doklady Akademii Nauk SSSR 138(3):677-680. In Russian.
Museum or Author Information
Classification
Phylum:
Charophyta
Class:
Charophyceae
Order:
Charales
Superfamily:
Unknown
Family:
Clavatoraceae
Formal Genus Name and Reference:
Nodosoclavator MAsLov, 1961, p. 679, emend., GRAMBAST, 1966c, p. 269
Type Species:
*Clavator nodosus РЕСК, 1957, p. 15, pl. 8, 3-18, OD
Images
(Click to enlarge in a new window)
Fig. 57,1a-b. *N. nodosus (Реск) Maslov, Aptian, North America, a, holotype, lateral view, b, paratype, lateral view, x60 (Peck, 1957, pl. 8,5-6), Fig. 57, 1c-d. N. adnatus Martin-Closas & Grambast-Fessard, Barremian, Spain, c, lateral view with part of branchlet, x50, d, interpretation of external utricle structure in connection with branchlet, x50 (Martin-Closas & GrambastFessard, 1986, pl. II,10, text-fig. 4)
Synonyms
Geographic Distribution
USA, France, Germany, United Kingdom, Portugal, Spain, Switzerland, Ukraine, China, Algeria
Age Range
Beginning Stage in Treatise Usage:
Nodosoclavator is
one of the oldest representatives of the Clavatoraceae
family. Upper Jurassic (Oxfordian)
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
Lower Cretaceous (Aptian)
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
0
Ending Date:
113.2
Description
Utricle with external layer restricted to basal portion of gyrogonite, nodular layer with tubercles well developed and irregularly disposed or more or less aligned with spirals and covering gyrogonite, Gyrogonites strongly beaked by abrupt upturn of spiral units at distal ends, Vegetative parts commonly preserved at base of utricle. [Nodosoclavator differs from Clavator in that outer structural layer is restricted to the basal part of the utricle or even missing. The nodosoclavatoroid utricles (SCHUDACK, 1989) are incompletely developed utricles of other Clavatoroideae, which may represent the Nodosoclavator stage and do not put the validity of the genus in question.]
References
Maslov, Vladimir Petrovich. 1961. Ne iavliaiutsia li Sitsidii i Khovanelly utrikulami kharophytov? [Are Sycidium and Chovanella not the utricles of charophytes?]. Doklady Akademii Nauk SSSR 138(3):677-680. In Russian.