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Drepanopyge
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Redlichiida
Superfamily:
Redlichioidea
Family:
Yinitidae
Formal Genus Name and Reference:
Drepanopyge LU, 1961, p. 303, 314
Type Species:
* D. mirabilis, OD, holotype (LU, 1961, pl. 2, fig. 2), 12659, NIGP, Nanjing
Images
(Click to enlarge in a new window)
Fig. 285,4a,b. { }^{*} D. mirabilis, eastern Yunnan (Yiliang), a, holotype, cranidium, X_{2}, b, paratype, librigena, X_{2}(L u, 1961)
Synonyms
Mayiella (Xishuiella) Yin in Yin & Li, 1978, p. 421 (type, M. (X. xishuiensis, OD)
Geographic Distribution
China (eastern Yunnan: Malong, Yiliang), Drepanuroides 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
Cranidium subrectangular, glabella broad, slightly tapering forward, and rounded in front, S1-S3 are transglabellar furrows, S3 weak, occipital furrow deeper than glabellar furrows, occipital ring uniform in length (sag. and exs. ), with a small median node, preglabellar field very short (sag. ), border of cranidium convex, border furrow narrow, marked by a row of small pits, eye lobe medium-sized, eye ridge distinct, fixigena wide (tr. ), nearly half glabellar width, posterior area of fixigena subtriangular, posterolateral furrow broad (exs.) and shallow, librigena with slightly advanced genal spine, Thorax with 10 segments, Pygidial axis convex, with 5 or 6 rings and a large terminal piece, pleural region with 5 pleurae, each ending in a short and stout spine, posterior pair of pygidial pleurae fused behind the terminal piece, posterior margin entire and bent backward, Hypostome broadly ovate, medium body large and elongately ovate, with transverse striations, posterior lobe narrow (sag. ), posterior border narrow and distinct, anterior wings triangular, Rostral plate very wide (tr.)
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Redlichiida
Superfamily:
Redlichioidea
Family:
Yinitidae
Formal Genus Name and Reference:
Drepanopyge LU, 1961, p. 303, 314
Type Species:
* D. mirabilis, OD, holotype (LU, 1961, pl. 2, fig. 2), 12659, NIGP, Nanjing
Images
(Click to enlarge in a new window)
Fig. 285,4a,b. { }^{*} D. mirabilis, eastern Yunnan (Yiliang), a, holotype, cranidium, X_{2}, b, paratype, librigena, X_{2}(L u, 1961)
Synonyms
Mayiella (Xishuiella) Yin in Yin & Li, 1978, p. 421 (type, M. (X. xishuiensis, OD)
Geographic Distribution
China (eastern Yunnan: Malong, Yiliang), Drepanuroides 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
Cranidium subrectangular, glabella broad, slightly tapering forward, and rounded in front, S1-S3 are transglabellar furrows, S3 weak, occipital furrow deeper than glabellar furrows, occipital ring uniform in length (sag. and exs. ), with a small median node, preglabellar field very short (sag. ), border of cranidium convex, border furrow narrow, marked by a row of small pits, eye lobe medium-sized, eye ridge distinct, fixigena wide (tr. ), nearly half glabellar width, posterior area of fixigena subtriangular, posterolateral furrow broad (exs.) and shallow, librigena with slightly advanced genal spine, Thorax with 10 segments, Pygidial axis convex, with 5 or 6 rings and a large terminal piece, pleural region with 5 pleurae, each ending in a short and stout spine, posterior pair of pygidial pleurae fused behind the terminal piece, posterior margin entire and bent backward, Hypostome broadly ovate, medium body large and elongately ovate, with transverse striations, posterior lobe narrow (sag. ), posterior border narrow and distinct, anterior wings triangular, Rostral plate very wide (tr.)