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Pseudobasilicus
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Asaphina
Family:
Asaphidae
Subfamily:
Asaphinae
Formal Genus Name and Reference:
Pseudobasilicus Reed, 1931
Type Species:
Ptychopyge lawrowi Fr. SCHMIDT, 1898
Images
(Click to enlarge in a new window)
Fig. 250, 3. *P. lawrowi (Fr. Schmidt), 3a, ceph., 3b, parts of 2 hindmost thoracic segments and pygidium showing at left shape of pygidial doublure, x1 (468).
Synonyms
Geographic Distribution
Baltoscandia
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Exoskeleton rather flattened, cephalon and pygidium with a broad flattened border. Frontal area moderately long, eyes large, as in Asaphus (Neoasaphus), librigenae broad, with genal spines. Lateral terminations of thoracic pleurae, unlike all other Asaphinae, pointed and curved backward, resembling short spines. Panderian organs and inner margin of thoracic pleural doublure as in Ptychopyge. Inner part of pygidial pleural fields with conspicuous rounded ribs that reach border (one species without ribs), pygidial doublure very broad, as in Ptychopyge.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Asaphina
Family:
Asaphidae
Subfamily:
Asaphinae
Formal Genus Name and Reference:
Pseudobasilicus Reed, 1931
Type Species:
Ptychopyge lawrowi Fr. SCHMIDT, 1898
Images
(Click to enlarge in a new window)
Fig. 250, 3. *P. lawrowi (Fr. Schmidt), 3a, ceph., 3b, parts of 2 hindmost thoracic segments and pygidium showing at left shape of pygidial doublure, x1 (468).
Synonyms
Geographic Distribution
Baltoscandia
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Exoskeleton rather flattened, cephalon and pygidium with a broad flattened border. Frontal area moderately long, eyes large, as in Asaphus (Neoasaphus), librigenae broad, with genal spines. Lateral terminations of thoracic pleurae, unlike all other Asaphinae, pointed and curved backward, resembling short spines. Panderian organs and inner margin of thoracic pleural doublure as in Ptychopyge. Inner part of pygidial pleural fields with conspicuous rounded ribs that reach border (one species without ribs), pygidial doublure very broad, as in Ptychopyge.