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Megalaspides
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Megalaspides Brøgger, 1886, *Megalaspis dalecarlicus HOLM, 1882
Type Species:
Megalaspis dalecarlicus HOLM, 1882
Images
(Click to enlarge in a new window)
Fig. 252, 1. * M. dalecarlicus (Holm), 1a, carapace (reconstr.), x1 (414n), 1b, hypostoma, x2 (484a).
Synonyms
Geographic Distribution
Baltoscandia
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(Arenig.)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
L.Ord.(Arenig.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cephalon with distinct flattened border, frontal area moderately long (in type species 0.16 of total length of cephalon), glabella fairly distinct, more or less parallel-sided, eyes moderately large, at or slightly behind mid-line of cranidium, posterior border furrow absent or faint, genal angles produced into spines. Thoracic axis considerably narrower than pleurae. Pygidium with axis commonly flattened and rather poorly defined, without border, pleural fields smooth, doublure narrow, with inner margin on both sides of axis more or less parallel to external margin.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Megalaspides Brøgger, 1886, *Megalaspis dalecarlicus HOLM, 1882
Type Species:
Megalaspis dalecarlicus HOLM, 1882
Images
(Click to enlarge in a new window)
Fig. 252, 1. * M. dalecarlicus (Holm), 1a, carapace (reconstr.), x1 (414n), 1b, hypostoma, x2 (484a).
Synonyms
Geographic Distribution
Baltoscandia
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(Arenig.)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
L.Ord.(Arenig.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cephalon with distinct flattened border, frontal area moderately long (in type species 0.16 of total length of cephalon), glabella fairly distinct, more or less parallel-sided, eyes moderately large, at or slightly behind mid-line of cranidium, posterior border furrow absent or faint, genal angles produced into spines. Thoracic axis considerably narrower than pleurae. Pygidium with axis commonly flattened and rather poorly defined, without border, pleural fields smooth, doublure narrow, with inner margin on both sides of axis more or less parallel to external margin.