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Pharostomina
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Phacopida
Superfamily:
Proetacea
Family:
Calymenidae
Formal Genus Name and Reference:
Pharostomina SDZUY, 1955
Type Species:
P. öpiki
Images
(Click to enlarge in a new window)
Fig. 356. *P. oepiki, Leimitz Sh., Tremadoc., a, cran., x4, b, fragmentary exoskel., x5 (272).
Synonyms
Colpocoryphoides
Geographic Distribution
Ger.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Differs from Pharostoma (Pharostomatinae) in that oval areas at inner ends of preoccipital lateral glabellar furrows are lacking, genae not markedly convex in front of eye lobes, genal spines short, no row of spines on under side of cephalic border. Hypostoma without median notch in posterior border. Pygidium with short posterior part of axis and narrow pleural border.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Phacopida
Superfamily:
Proetacea
Family:
Calymenidae
Formal Genus Name and Reference:
Pharostomina SDZUY, 1955
Type Species:
P. öpiki
Images
(Click to enlarge in a new window)
Fig. 356. *P. oepiki, Leimitz Sh., Tremadoc., a, cran., x4, b, fragmentary exoskel., x5 (272).
Synonyms
Colpocoryphoides
Geographic Distribution
Ger.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Differs from Pharostoma (Pharostomatinae) in that oval areas at inner ends of preoccipital lateral glabellar furrows are lacking, genae not markedly convex in front of eye lobes, genal spines short, no row of spines on under side of cephalic border. Hypostoma without median notch in posterior border. Pygidium with short posterior part of axis and narrow pleural border.