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Oktavites
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Monograptidae
Formal Genus Name and Reference:
Oktavites LEVINA, 1928, p. 10
Type Species:
*Graptolithus spiralis Geinitz, 1842, p. 700, SD OBUT, 1964, p. 328
Images
(Click to enlarge in a new window)
Fig. 300,6a-c. *O. spiralis (Geinitz), 6a, syntype (not preserved, see Maletz, 2001a, p. 171) (Geinitz, 1842, pl.
Synonyms
Obutograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian (Aeronian, Stimulograptus sedgwickii Biozone)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian (Telychian, Cyrtograptus lapworthi Biozone)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Dorsally curved or spirally coiled tubarium, metathecae triangular, sometimes almost rastritiform proximally, with little or no overlap, thecal apertures laterally expanded, sometimes asymmetrically, torsion, affecting the entirety of metatheca, developed distally, extension of metathecal dorsal wall over central portion of aperture causes this to face dorsally
References
Levina, E. F. 1928. Graptolitit iz Aq-Tengi v Turkestanskom chrebte. Trudy Sredie-Aziatskogo Gosydarstvennogo Universiteta, Series 7a, Geologiya 5:1-18.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Monograptidae
Formal Genus Name and Reference:
Oktavites LEVINA, 1928, p. 10
Type Species:
*Graptolithus spiralis Geinitz, 1842, p. 700, SD OBUT, 1964, p. 328
Images
(Click to enlarge in a new window)
Fig. 300,6a-c. *O. spiralis (Geinitz), 6a, syntype (not preserved, see Maletz, 2001a, p. 171) (Geinitz, 1842, pl.
Synonyms
Obutograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian (Aeronian, Stimulograptus sedgwickii Biozone)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian (Telychian, Cyrtograptus lapworthi Biozone)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Dorsally curved or spirally coiled tubarium, metathecae triangular, sometimes almost rastritiform proximally, with little or no overlap, thecal apertures laterally expanded, sometimes asymmetrically, torsion, affecting the entirety of metatheca, developed distally, extension of metathecal dorsal wall over central portion of aperture causes this to face dorsally
References
Levina, E. F. 1928. Graptolitit iz Aq-Tengi v Turkestanskom chrebte. Trudy Sredie-Aziatskogo Gosydarstvennogo Universiteta, Series 7a, Geologiya 5:1-18.