Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Ampyx
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Proetacea
Family:
Raphiophoridae
Formal Genus Name and Reference:
Ampyx DALMAN, 1827
Type Species:
A. nastttus
Images
(Click to enlarge in a new window)
Fig. 327,4. °A . IlamltlS, L.Ord., Swed.-Norway-USSR.; 4a, exoskel., X 1.5; 4b, ceph., left lateral, X 1.5 (496n).
Synonyms
Brachyampyx
Geographic Distribution
N.Am.-Eu.
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:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Glabellar spine long, upwardly curved, circular in cross section, with 3 pairs of ovate muscle scars on glabella, 4th pair at extremities of occipital furrow, alae absent, genal spines circular in cross section. Thorax with 6 segments, pleural furrows deepening outward, last 3 pairs curving forward, concave toward front. Pygidium with 2 paired rows of muscle scars on axis, pleural fields with single pair pleural furrows. External surface with fine pits, terraced lines on vertical borders and doublure.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Proetacea
Family:
Raphiophoridae
Formal Genus Name and Reference:
Ampyx DALMAN, 1827
Type Species:
A. nastttus
Images
(Click to enlarge in a new window)
Fig. 327,4. °A . IlamltlS, L.Ord., Swed.-Norway-USSR.; 4a, exoskel., X 1.5; 4b, ceph., left lateral, X 1.5 (496n).
Synonyms
Brachyampyx
Geographic Distribution
N.Am.-Eu.
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:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Glabellar spine long, upwardly curved, circular in cross section, with 3 pairs of ovate muscle scars on glabella, 4th pair at extremities of occipital furrow, alae absent, genal spines circular in cross section. Thorax with 6 segments, pleural furrows deepening outward, last 3 pairs curving forward, concave toward front. Pygidium with 2 paired rows of muscle scars on axis, pleural fields with single pair pleural furrows. External surface with fine pits, terraced lines on vertical borders and doublure.