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Youngia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Phacopida
Superfamily:
Proetacea
Family:
Cheiruridae
Formal Genus Name and Reference:
Youngia Lindström, 1885 [non Youngia Jones & KIRKBY, 1886]
Type Species:
Cheirurus trispinosus Young, 1868, SD VOGDES, 1917, p. 8
Images
(Click to enlarge in a new window)
Fig. 341, 3. *Y. trispinosa (Young), incompl. cran., X1 (452).
Synonyms
Geographic Distribution
Scot.-Ural.
Age Range
Beginning Stage in Treatise Usage:
Sil.
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
L.Dev.
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
"Glabella about as long as wide, with 3 pairs of lateral furrows, stout occipital spine, fixigenae narrow (tr.), with long genal spine."
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Phacopida
Superfamily:
Proetacea
Family:
Cheiruridae
Formal Genus Name and Reference:
Youngia Lindström, 1885 [non Youngia Jones & KIRKBY, 1886]
Type Species:
Cheirurus trispinosus Young, 1868, SD VOGDES, 1917, p. 8
Images
(Click to enlarge in a new window)
Fig. 341, 3. *Y. trispinosa (Young), incompl. cran., X1 (452).
Synonyms
Geographic Distribution
Scot.-Ural.
Age Range
Beginning Stage in Treatise Usage:
Sil.
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
L.Dev.
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
"Glabella about as long as wide, with 3 pairs of lateral furrows, stout occipital spine, fixigenae narrow (tr.), with long genal spine."