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Yiliangella
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Redlichiida
Superfamily:
Redlichioidea
Family:
Gigantopygidae
Formal Genus Name and Reference:
Yiliangella W. CHANG, 1966, p. 161
Type Species:
Y. forficula, OD, holotype (W. Chang, 1966, pl. 6, fig. 1), 18184, NIGP, Nanjing
Images
(Click to enlarge in a new window)
Fig. 290,2. *Y. forficula, eastern Yunnan (Yiliang), holotype, cephalon and thorax, × 2.7 (W. Chang, 1966).
Synonyms
Palaeoaspis Yang, 1981, p. 78 (type, P. barbutus, OD)
Geographic Distribution
China (eastern Yunnan, western Sichuan), Yiliangella Zone.
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale) (lower Canglangpuan)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
Lower Cambrian (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale) (lower Canglangpuan)
Ending International Stage:
Cambrian Stage 3
Fraction Up In Ending Stage:
0
Ending Date:
514.5
Description
Glabella tapering forward, with frontal lobe rounded, preglabellar field absent, eye lobe relatively small, anterior cranidial border short (sag. and exs.) and convex. Thorax with 16 segments. Pygidium small, with 2 pairs of pygidial spines, pygidial axial lobe with an anterior ring and long (sag.), cylindrical terminal piece. Hypostome subtriangular, medial body ovate, border furrow well developed anterolaterally, posterior margin with 11 or 12 small spines.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Redlichiida
Superfamily:
Redlichioidea
Family:
Gigantopygidae
Formal Genus Name and Reference:
Yiliangella W. CHANG, 1966, p. 161
Type Species:
Y. forficula, OD, holotype (W. Chang, 1966, pl. 6, fig. 1), 18184, NIGP, Nanjing
Images
(Click to enlarge in a new window)
Fig. 290,2. *Y. forficula, eastern Yunnan (Yiliang), holotype, cephalon and thorax, × 2.7 (W. Chang, 1966).
Synonyms
Palaeoaspis Yang, 1981, p. 78 (type, P. barbutus, OD)
Geographic Distribution
China (eastern Yunnan, western Sichuan), Yiliangella Zone.
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale) (lower Canglangpuan)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
Lower Cambrian (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale) (lower Canglangpuan)
Ending International Stage:
Cambrian Stage 3
Fraction Up In Ending Stage:
0
Ending Date:
514.5
Description
Glabella tapering forward, with frontal lobe rounded, preglabellar field absent, eye lobe relatively small, anterior cranidial border short (sag. and exs.) and convex. Thorax with 16 segments. Pygidium small, with 2 pairs of pygidial spines, pygidial axial lobe with an anterior ring and long (sag.), cylindrical terminal piece. Hypostome subtriangular, medial body ovate, border furrow well developed anterolaterally, posterior margin with 11 or 12 small spines.