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Iniospheniscus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Iniospheniscus ÖRIК, 1979, p. 50
Type Species:
* I. talis, OD, holotype (ÖРІК, 1979, pl. 9, fig. 1), СРС 14021, AGSO, Canberra
Images
(Click to enlarge in a new window)
Fig. 230,6a,b. *I. talis, Middle Cambrian (Undillan, Ptychagnostus punctuosus Zone), Australia (Camooweal district, western Queensland); a, cephalon, CPC 14026, ×8; b, holotype, pygidium, CPC 14021, ×13 (new).
Synonyms
Geographic Distribution
Australia (Queensland), A. atavus to P. punctuosus Zones; China (Shandong, Liaoning), Amphoton Zone.
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
0
Beginning Date:
512.3
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
A nonscrobiculate trilobite with subdeliquiate to deliquiate border furrows, pygidial border commonly incipiently zonate, acrolobes unconstricted, median preglabellar furrow absent. Glabella with subrectangular anterior lobe, F3 well developed, posterior lobe with weak F2 furrows, glabellar node about level with F2 furrows. Pygidium bispinose, axis long, reaching border furrow, expanding rearwards, F1, F2 impressed laterally, posterior lobe very broad, semiovate, rounded posteriorly, lacking transverse depression, pygidial collar absent or very short (tr.), indistinct.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Iniospheniscus ÖRIК, 1979, p. 50
Type Species:
* I. talis, OD, holotype (ÖРІК, 1979, pl. 9, fig. 1), СРС 14021, AGSO, Canberra
Images
(Click to enlarge in a new window)
Fig. 230,6a,b. *I. talis, Middle Cambrian (Undillan, Ptychagnostus punctuosus Zone), Australia (Camooweal district, western Queensland); a, cephalon, CPC 14026, ×8; b, holotype, pygidium, CPC 14021, ×13 (new).
Synonyms
Geographic Distribution
Australia (Queensland), A. atavus to P. punctuosus Zones; China (Shandong, Liaoning), Amphoton Zone.
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
0
Beginning Date:
512.3
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
A nonscrobiculate trilobite with subdeliquiate to deliquiate border furrows, pygidial border commonly incipiently zonate, acrolobes unconstricted, median preglabellar furrow absent. Glabella with subrectangular anterior lobe, F3 well developed, posterior lobe with weak F2 furrows, glabellar node about level with F2 furrows. Pygidium bispinose, axis long, reaching border furrow, expanding rearwards, F1, F2 impressed laterally, posterior lobe very broad, semiovate, rounded posteriorly, lacking transverse depression, pygidial collar absent or very short (tr.), indistinct.