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Lonchodomas
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Proetacea
Family:
Raphiophoridae
Formal Genus Name and Reference:
Lonchodomas Angelin, 1854
Type Species:
Ampyx rostratus Sars, 1835, SD BASSLER, 1915
Images
(Click to enlarge in a new window)
Fig. 328, 3. *L. rostratum (Sars), Up.L.Ord., Norway, 3a, cran., dorsal, x2.7, 3b, pyg., x4 (496).
Synonyms
Geographic Distribution
N.Am.-S.Am.-Eu.-Asia.
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:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Like Ampyx but glabella diamond-shaped in outline, carinate, with long median glabellar spine subquadrate in section directed horizontally, glabella with 2 pairs of muscle scars, genal spines subquadrate in section. Thorax with 5 segments. Pleural regions of pygidium with 2 pairs of narrow pleural furrows.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Proetacea
Family:
Raphiophoridae
Formal Genus Name and Reference:
Lonchodomas Angelin, 1854
Type Species:
Ampyx rostratus Sars, 1835, SD BASSLER, 1915
Images
(Click to enlarge in a new window)
Fig. 328, 3. *L. rostratum (Sars), Up.L.Ord., Norway, 3a, cran., dorsal, x2.7, 3b, pyg., x4 (496).
Synonyms
Geographic Distribution
N.Am.-S.Am.-Eu.-Asia.
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:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Like Ampyx but glabella diamond-shaped in outline, carinate, with long median glabellar spine subquadrate in section directed horizontally, glabella with 2 pairs of muscle scars, genal spines subquadrate in section. Thorax with 5 segments. Pleural regions of pygidium with 2 pairs of narrow pleural furrows.