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Olenaspella
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Illaenuracea
Family:
Parabolinoididae
Formal Genus Name and Reference:
Olenaspella WILSON, 1956, 497
Type Species:
Parabolinella? evansi KOBAYASHI, 1936
Images
(Click to enlarge in a new window)
Fig. 202, 7. *O. evansi (Kobayasht), W.Can.(B.C.), 7 a-c, cran., librigena, pyg., x2 (497).
Synonyms
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(U.Dresbach.-Francon.)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
0
Beginning Date:
497
Ending Stage in Treatise Usage:
Upper Cambrian(U.Dresbach.-Francon.)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella slightly convex, subrectangular, front rounded, posterior 2 pairs of lateral furrows distinct, wide (tr.) frontal area 0.25 to 0.3 of length of cranidium, crossed by slightly curved anterior border furrow, eye ridges distinct, eyes of medium size, opposite center of glabella, fixigenae nearly horizontal, with palpebral areas about 0.5 of glabellar width, posterior areas narrowly (exsag.) triangular, about same in length (tr.) as occipital ring, posterior sections of facial sutures sigmoidally curved, librigenae with tapered genal spines. Pygidium transverse, axis same in width as pleural fields, with 4 axial rings and terminal, 4 pleurae with distinct interpleural grooves and faint pleural furrows, border furrow faint, 2 pairs of short, widely spaced marginal spines.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Illaenuracea
Family:
Parabolinoididae
Formal Genus Name and Reference:
Olenaspella WILSON, 1956, 497
Type Species:
Parabolinella? evansi KOBAYASHI, 1936
Images
(Click to enlarge in a new window)
Fig. 202, 7. *O. evansi (Kobayasht), W.Can.(B.C.), 7 a-c, cran., librigena, pyg., x2 (497).
Synonyms
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(U.Dresbach.-Francon.)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
0
Beginning Date:
497
Ending Stage in Treatise Usage:
Upper Cambrian(U.Dresbach.-Francon.)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella slightly convex, subrectangular, front rounded, posterior 2 pairs of lateral furrows distinct, wide (tr.) frontal area 0.25 to 0.3 of length of cranidium, crossed by slightly curved anterior border furrow, eye ridges distinct, eyes of medium size, opposite center of glabella, fixigenae nearly horizontal, with palpebral areas about 0.5 of glabellar width, posterior areas narrowly (exsag.) triangular, about same in length (tr.) as occipital ring, posterior sections of facial sutures sigmoidally curved, librigenae with tapered genal spines. Pygidium transverse, axis same in width as pleural fields, with 4 axial rings and terminal, 4 pleurae with distinct interpleural grooves and faint pleural furrows, border furrow faint, 2 pairs of short, widely spaced marginal spines.