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Damesella
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Damesellacea
Family:
Damesellidea
Formal Genus Name and Reference:
Damesella WALCOTT, 1905
Type Species:
Damesella paronai (Airaghi), 1902 (=Damesella blackwelderi WALCORT, 1905)
Images
(Click to enlarge in a new window)
Fig. 234, 4. *D. paronai (Airaghi), Wentsui Sh., China (Shantung), exoskel., x0.7 (419).
Synonyms
Geographic Distribution
E.Asia
Age Range
Beginning Stage in Treatise Usage:
Up.M.Cam.
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
Up.M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
Glabella with 3 pairs of short diagonal lateral furrows, no preglabellar field, anterior border furrow running into preglabeliar furrow, narrow convex border, eye ridges long, diagonal, eyes behind mid-length of glabella, fixigenae with palpebral areas 0.7 to equal width of glabella, posterior areas of medium width (exsag.), long, with deep posterior border furrow, librigenae with genal spines in lateral or longitudinal position. Thorax with 12 segments. Pygidium semicircular, 4 axial rings and terminal, pleural fields slightly convex, equal to axis in width, with 5 to 7 pleurae, 6 to 8 marginal spines of variable length, of which anterior pair may be longest. Surface with granules of several sizes.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Damesellacea
Family:
Damesellidea
Formal Genus Name and Reference:
Damesella WALCOTT, 1905
Type Species:
Damesella paronai (Airaghi), 1902 (=Damesella blackwelderi WALCORT, 1905)
Images
(Click to enlarge in a new window)
Fig. 234, 4. *D. paronai (Airaghi), Wentsui Sh., China (Shantung), exoskel., x0.7 (419).
Synonyms
Geographic Distribution
E.Asia
Age Range
Beginning Stage in Treatise Usage:
Up.M.Cam.
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
Up.M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
Glabella with 3 pairs of short diagonal lateral furrows, no preglabellar field, anterior border furrow running into preglabeliar furrow, narrow convex border, eye ridges long, diagonal, eyes behind mid-length of glabella, fixigenae with palpebral areas 0.7 to equal width of glabella, posterior areas of medium width (exsag.), long, with deep posterior border furrow, librigenae with genal spines in lateral or longitudinal position. Thorax with 12 segments. Pygidium semicircular, 4 axial rings and terminal, pleural fields slightly convex, equal to axis in width, with 5 to 7 pleurae, 6 to 8 marginal spines of variable length, of which anterior pair may be longest. Surface with granules of several sizes.