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Corynoides
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
None
Family:
Glossograptidae
Formal Genus Name and Reference:
Corynoides NICHOLSON, 1867a, p. 108
Type Species:
*C. calicularis, M
Images
(Click to enlarge in a new window)
Fig. 218,2 a-b.* C. calicularis, 2a, BMHM Q62, lectotype (Zalasiewicz, 2000a, Atlas, Folio 1.14), 2b, reconstruction, scale bars, 1 mm (new)
Synonyms
Corynograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Sandbian, Nemagraptus gracilis Biozone)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Diplacanthograptus spiniferus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
100
Ending Date:
445.21
Description
Strongly reduced colony consisting of elongated sicula and two adnate thecae with extended rutella, a fourth vestigial theca may be present, origin of th $1^{1}$ in the upper part of prosicula
References
Nicholson, H. A. 1867a. On some fossils from the Lower Silurian rocks of the south of Scotland. Geological Magazine 1(4):107-113, pl. 7.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
None
Family:
Glossograptidae
Formal Genus Name and Reference:
Corynoides NICHOLSON, 1867a, p. 108
Type Species:
*C. calicularis, M
Images
(Click to enlarge in a new window)
Fig. 218,2 a-b.* C. calicularis, 2a, BMHM Q62, lectotype (Zalasiewicz, 2000a, Atlas, Folio 1.14), 2b, reconstruction, scale bars, 1 mm (new)
Synonyms
Corynograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Sandbian, Nemagraptus gracilis Biozone)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Diplacanthograptus spiniferus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
100
Ending Date:
445.21
Description
Strongly reduced colony consisting of elongated sicula and two adnate thecae with extended rutella, a fourth vestigial theca may be present, origin of th $1^{1}$ in the upper part of prosicula
References
Nicholson, H. A. 1867a. On some fossils from the Lower Silurian rocks of the south of Scotland. Geological Magazine 1(4):107-113, pl. 7.