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Baltagnostus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Baltagnostus Lochman in Lochman & DUNCAN, 1944, p. 132
Type Species:
Proagnostus? centerensis Resser, 1938, p. 48, OD, holotype (RESSER, 1938, pl. 10, fig. 18), 94868, USNM, Washington, D.C.
Images
(Click to enlarge in a new window)
Fig. 230,2. *B. centerensis (RESSER), upper Middle Cambrian (Marjuman, zone uncertain), USA (Moshat, Alabama); holotype, exoskeleton, USNM 94868, ×8 (new).
Synonyms
Geographic Distribution
USA (Alabama, Montana, Nevada, New York, Tennessee, Texas, Utah), Bolaspidella Zone; Canada (Quebec), China (Liaoning), upper Middle Cambrian; southern Korea, Tonkinella Zone; Australia (Queensland), E. opimus to D. notalibrae Zones.
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
Nonscrobiculate, with deliquiate border furrows, unconstricted acrolobes, median preglabellar furrow absent. Glabella with subquadrate to subpentagonal anterior lobe, F3 clear, posterior lobe with weak F2 furrows, glabellar culmination narrowly rounded or angular, glabellar node about level with F2 furrows. Pygidium bispinose, axis long, reaching border furrow, F1, F2 effaced, posterior lobe semiovate, broadly rounded posteriorly, pygidial collar arcuate, short (tr. ), indistinct.
References
Lochman, Christina, \& D. Duncan. 1944. Early Upper Cambrian faunas of central Montana. Geological Society of America, Special Papers 54:181 p., 19 pl .
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Diplagnostidae
Formal Genus Name and Reference:
Baltagnostus Lochman in Lochman & DUNCAN, 1944, p. 132
Type Species:
Proagnostus? centerensis Resser, 1938, p. 48, OD, holotype (RESSER, 1938, pl. 10, fig. 18), 94868, USNM, Washington, D.C.
Images
(Click to enlarge in a new window)
Fig. 230,2. *B. centerensis (RESSER), upper Middle Cambrian (Marjuman, zone uncertain), USA (Moshat, Alabama); holotype, exoskeleton, USNM 94868, ×8 (new).
Synonyms
Geographic Distribution
USA (Alabama, Montana, Nevada, New York, Tennessee, Texas, Utah), Bolaspidella Zone; Canada (Quebec), China (Liaoning), upper Middle Cambrian; southern Korea, Tonkinella Zone; Australia (Queensland), E. opimus to D. notalibrae Zones.
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
Nonscrobiculate, with deliquiate border furrows, unconstricted acrolobes, median preglabellar furrow absent. Glabella with subquadrate to subpentagonal anterior lobe, F3 clear, posterior lobe with weak F2 furrows, glabellar culmination narrowly rounded or angular, glabellar node about level with F2 furrows. Pygidium bispinose, axis long, reaching border furrow, F1, F2 effaced, posterior lobe semiovate, broadly rounded posteriorly, pygidial collar arcuate, short (tr. ), indistinct.
References
Lochman, Christina, \& D. Duncan. 1944. Early Upper Cambrian faunas of central Montana. Geological Society of America, Special Papers 54:181 p., 19 pl .