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Doryagnostus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Spinagnostidae
Formal Genus Name and Reference:
Doryagnostus KOBAYASHI, 1939a, p. 148
Type Species:
Agnostus incertus Brögger, 1878, p. 70, OD, lectotype (Nikolaisen & HENNINGSMOEN, 1990, fig. 2a), 28200, PMO, Oslo
Images
(Click to enlarge in a new window)
Fig. 228,1a,b. *D. incertus (BRÖGGER ), Middle Cambrian (Ptychagnostus punctuosus Zone), southern Norway (Krekling Station, Oslo district); a, paralectotype, cephalon, PMO H2646, × 8; b, lectotype, pygidium, PMO 28200, × 8 (Nikolaisen & Henningsmoen, 1990, fig. 2a, 26).
Synonyms
Ceratagnostus
Geographic Distribution
northern Greenland; England; Norway, Denmark, P. tessini Zone; Sweden, P. punctuosus Zone; Canada (Newfoundland), P. davidis Zone; Australia (Queensland), E. opimus to G. nathorsti Zones; Russia (southeastern Siberia), late P. davidis to P. forchhammeri Zones; China (Xinjiang), G. nathorsti or P. punctuosus Zone, (Hunan, Guizhou), zone uncertain.
Age Range
Beginning Stage in Treatise Usage:
upper Middle Cambrian
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
upper Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
Median preglabellar furrow well developed, usually expanding into deltoid area anteriorly, Glabella with ogival anterior lobe, Pygidium bispinose, axis ogival, acuminate posteriorly, posterior lobe ogival, commonly with transverse depression
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Spinagnostidae
Formal Genus Name and Reference:
Doryagnostus KOBAYASHI, 1939a, p. 148
Type Species:
Agnostus incertus Brögger, 1878, p. 70, OD, lectotype (Nikolaisen & HENNINGSMOEN, 1990, fig. 2a), 28200, PMO, Oslo
Images
(Click to enlarge in a new window)
Fig. 228,1a,b. *D. incertus (BRÖGGER ), Middle Cambrian (Ptychagnostus punctuosus Zone), southern Norway (Krekling Station, Oslo district); a, paralectotype, cephalon, PMO H2646, × 8; b, lectotype, pygidium, PMO 28200, × 8 (Nikolaisen & Henningsmoen, 1990, fig. 2a, 26).
Synonyms
Ceratagnostus
Geographic Distribution
northern Greenland; England; Norway, Denmark, P. tessini Zone; Sweden, P. punctuosus Zone; Canada (Newfoundland), P. davidis Zone; Australia (Queensland), E. opimus to G. nathorsti Zones; Russia (southeastern Siberia), late P. davidis to P. forchhammeri Zones; China (Xinjiang), G. nathorsti or P. punctuosus Zone, (Hunan, Guizhou), zone uncertain.
Age Range
Beginning Stage in Treatise Usage:
upper Middle Cambrian
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
upper Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
Median preglabellar furrow well developed, usually expanding into deltoid area anteriorly, Glabella with ogival anterior lobe, Pygidium bispinose, axis ogival, acuminate posteriorly, posterior lobe ogival, commonly with transverse depression