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Bonnia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Corynexochida
Superfamily:
Unknown
Family:
Dorypygidae
Formal Genus Name and Reference:
Bonnia WALCOTT, 1916
Type Species:
*Bathyurus parvulus BILLINGS, 1861
Images
(Click to enlarge in a new window)
Fig. 159, 3. B. brennus (Walcott), Que., 3 a, b, cran., dors. and lat. views, x4, 3 c, pyg., x3 (194).
Synonyms
Geographic Distribution
N.Am.-Greenl.-E. Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
100
Ending Date:
509
Description
Small, strongly arched, with subcylindrical or clavate to ovate glabella, deeply impressed anterior border furrow, prominent anterior border, Thoracic segments 8, Pygidium almost semicircular, with 4 or 5 axial rings, narrow, well-impressed border furrow, narrow border, and 1 to 3 pairs of minute lateral marginal spines, Surface smooth or granulate, with granules commonly arranged in irregular concentric lines on glabella
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Corynexochida
Superfamily:
Unknown
Family:
Dorypygidae
Formal Genus Name and Reference:
Bonnia WALCOTT, 1916
Type Species:
*Bathyurus parvulus BILLINGS, 1861
Images
(Click to enlarge in a new window)
Fig. 159, 3. B. brennus (Walcott), Que., 3 a, b, cran., dors. and lat. views, x4, 3 c, pyg., x3 (194).
Synonyms
Geographic Distribution
N.Am.-Greenl.-E. Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
100
Ending Date:
509
Description
Small, strongly arched, with subcylindrical or clavate to ovate glabella, deeply impressed anterior border furrow, prominent anterior border, Thoracic segments 8, Pygidium almost semicircular, with 4 or 5 axial rings, narrow, well-impressed border furrow, narrow border, and 1 to 3 pairs of minute lateral marginal spines, Surface smooth or granulate, with granules commonly arranged in irregular concentric lines on glabella