Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Dionide
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Trinucleina
Family:
Dionididae
Formal Genus Name and Reference:
Dionide Barrande, 1847
Type Species:
Dione formosa BARRANDE, 1846
Images
(Click to enlarge in a new window)
Fig. 327, 2. *D. formosa (Barrande), M.Ord., Boh., exoskel. (reconstr.), x1.25 (496n).
Synonyms
Polytomurus, Trigrypos
Geographic Distribution
Eu.-Va.-Yunnan.
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:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Glabella subquadrate, with median tubercle, preglabellar field short (sag.) or absent, fringe broad. Axial rings of thorax and pygidium with anterolateral corner isolated by diagonal furrows, sigmoidal course of posterior edge of rings characteristic. Inner part of anterior band of 1st thoracic pleurae inflated. Surface of genae and pleurae pitted, ridges between pits forming reticulate pattern. M.Ord.-U.Ord., Eu.-Va.-Yunnan.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Trinucleina
Family:
Dionididae
Formal Genus Name and Reference:
Dionide Barrande, 1847
Type Species:
Dione formosa BARRANDE, 1846
Images
(Click to enlarge in a new window)
Fig. 327, 2. *D. formosa (Barrande), M.Ord., Boh., exoskel. (reconstr.), x1.25 (496n).
Synonyms
Polytomurus, Trigrypos
Geographic Distribution
Eu.-Va.-Yunnan.
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:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Glabella subquadrate, with median tubercle, preglabellar field short (sag.) or absent, fringe broad. Axial rings of thorax and pygidium with anterolateral corner isolated by diagonal furrows, sigmoidal course of posterior edge of rings characteristic. Inner part of anterior band of 1st thoracic pleurae inflated. Surface of genae and pleurae pitted, ridges between pits forming reticulate pattern. M.Ord.-U.Ord., Eu.-Va.-Yunnan.