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Hadragnostus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Agnostidae
Formal Genus Name and Reference:
Hadragnostus ÖPIK, 1967, p. 102
Type Species:
* H. las, OD, holotype (ÖРІК, 1967, pl. 58, fig. 8), СРС 5861, AGSO, Canberra
Images
(Click to enlarge in a new window)
.png)
Fig. 220,5. *H. las, Upper Cambrian (Mindyallan, Erediaspis eretes Zone), Australia (Glenormiston district, western Queensland), holotype, pygidium, CPC 5861, X16 (new)."
Synonyms
Geographic Distribution
Australia (Queensland), E. eretes to A. quasivespa Zones; Iran, Drepanura Zone; Canada (Northwest Territories), Cedaria selwyni to C. brevifrons Zones; USA (Montana), Crepicephalus Zone.
Age Range
Beginning Stage in Treatise Usage:
lower Upper Cambrian
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
lower Upper Cambrian
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
0
Ending Date:
512.3
Description
Cephalon and pygidium transverse, en grande tenue, with subdeliquiate border furrows and narrow border on cephalon and moderately wide border on pygidium. Median preglabellar furrow broad, short. Glabella relatively long with short (sag.), subtriangular to ogival anterior lobe, F3 straight, posterior lobe with weakly developed F2 and broadly rounded glabellar culmination, glabellar node absent. Pygidial axis tapering forward from middle of posterior lobe with constriction across M2 weak or absent, F1 and F2 furrows effaced.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Agnostidae
Formal Genus Name and Reference:
Hadragnostus ÖPIK, 1967, p. 102
Type Species:
* H. las, OD, holotype (ÖРІК, 1967, pl. 58, fig. 8), СРС 5861, AGSO, Canberra
Images
(Click to enlarge in a new window)
Fig. 220,5. *H. las, Upper Cambrian (Mindyallan, Erediaspis eretes Zone), Australia (Glenormiston district, western Queensland), holotype, pygidium, CPC 5861, X16 (new)."
Synonyms
Geographic Distribution
Australia (Queensland), E. eretes to A. quasivespa Zones; Iran, Drepanura Zone; Canada (Northwest Territories), Cedaria selwyni to C. brevifrons Zones; USA (Montana), Crepicephalus Zone.
Age Range
Beginning Stage in Treatise Usage:
lower Upper Cambrian
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
lower Upper Cambrian
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
0
Ending Date:
512.3
Description
Cephalon and pygidium transverse, en grande tenue, with subdeliquiate border furrows and narrow border on cephalon and moderately wide border on pygidium. Median preglabellar furrow broad, short. Glabella relatively long with short (sag.), subtriangular to ogival anterior lobe, F3 straight, posterior lobe with weakly developed F2 and broadly rounded glabellar culmination, glabellar node absent. Pygidial axis tapering forward from middle of posterior lobe with constriction across M2 weak or absent, F1 and F2 furrows effaced.