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Oidalagnostus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Oidalagnostus WESTERGÅRD, 1946, p. 65
Type Species:
*O. trispinifer; OD; holotype (WESTERGÅRD, 1946, pl. 9, fig. 6), 4879, SGU, Uppsala
Images
(Click to enlarge in a new window)
Fig. 231,2a,b. *O. trispinifer, Middle Cambrian (Lejopyge laevigata Zone), Sweden (Gudhem, Västergötland); a, cephalon, SGU 4878, ×6; b, holotype, pygidium, SGU 4879, × 6 (new).
Synonyms
Ovalagnostus
Geographic Distribution
northern Greenland; Sweden, L. laevigata Zone; Australia (Queensland, Tasmania), L. laevigata, C. quasivespa, G. stolidotus Zones; Canada (Newfoundland), A. pisiformis Zone; Russia (northwestern Siberia), Pedinocephalus or Toxotis Zone, (southern Siberia), L. laevigata Zone; China (Zhejiang), L. armata to L. sinensis Zones, (Hunan), L. laevigata Zone.
Age Range
Beginning Stage in Treatise Usage:
uppermost Middle Cambrian
Beginning International Stage:
Fraction Up In Beginning Stage:
0
Beginning Date:
501.63
Ending Stage in Treatise Usage:
lower Upper Cambrian
Ending International Stage:
Fraction Up In Ending Stage:
0
Ending Date:
493.4
Description
Median preglabellar furrow weakly developed. Pygidial axis long, extending to pygidial collar; posteroaxis with tumid, subrectangular posterior portion; posterior portion commonly separated from pleural field by paired bosses and weak accessory furrows; pygidial collar arcuate, with median depression.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Oidalagnostus WESTERGÅRD, 1946, p. 65
Type Species:
*O. trispinifer; OD; holotype (WESTERGÅRD, 1946, pl. 9, fig. 6), 4879, SGU, Uppsala
Images
(Click to enlarge in a new window)
Fig. 231,2a,b. *O. trispinifer, Middle Cambrian (Lejopyge laevigata Zone), Sweden (Gudhem, Västergötland); a, cephalon, SGU 4878, ×6; b, holotype, pygidium, SGU 4879, × 6 (new).
Synonyms
Ovalagnostus
Geographic Distribution
northern Greenland; Sweden, L. laevigata Zone; Australia (Queensland, Tasmania), L. laevigata, C. quasivespa, G. stolidotus Zones; Canada (Newfoundland), A. pisiformis Zone; Russia (northwestern Siberia), Pedinocephalus or Toxotis Zone, (southern Siberia), L. laevigata Zone; China (Zhejiang), L. armata to L. sinensis Zones, (Hunan), L. laevigata Zone.
Age Range
Beginning Stage in Treatise Usage:
uppermost Middle Cambrian
Beginning International Stage:
Fraction Up In Beginning Stage:
0
Beginning Date:
501.63
Ending Stage in Treatise Usage:
lower Upper Cambrian
Ending International Stage:
Fraction Up In Ending Stage:
0
Ending Date:
493.4
Description
Median preglabellar furrow weakly developed. Pygidial axis long, extending to pygidial collar; posteroaxis with tumid, subrectangular posterior portion; posterior portion commonly separated from pleural field by paired bosses and weak accessory furrows; pygidial collar arcuate, with median depression.