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Pterygotus
Classification
Phylum:
Arthropoda
Subphylum:
Chelicerata
Class:
Merostomata
Subclass:
Eurypterida
Order:
Eurypterida (subclass) has no Orders
Superfamily:
Eurypteracea
Family:
Pterygotidae
Formal Genus Name and Reference:
Pterygotus AGASSIZ, 1839
Type Species:
P. problematicus
Images
(Click to enlarge in a new window)
Figs. 20,2; 22,2a-d. P. (P.) rhenaniae JAEKEL, L.Dev., Ger.; 20,2a.b, genital appendage of female, dorsal, ventral, X0.14; 20, 2e,d, genital appendage of male, dorsal, ventral, X0.14; Fig. 22,2a, dorsal, X0.45; 22,2b. chelicera, X0.7; 22,2e.d, genital appendages, male, female, X0.2 (64). --FIG. 22,2e. P. (P.) anglieus AGASSIZ, L.Dev.(Old Red Sandstone), Scot.; metastoma, X0.3 (67)
Synonyms
Geographic Distribution
Eu.-Spitz.-N.Am.-Austra
Age Range
Beginning Stage in Treatise Usage:
Ordovician
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Devonian
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Small to very large exoskeleton with dis- tinct semilunar scales; large marginal com- pound eyes; telson strongly expanded; epi- stoma present; chelicerae very large and long, provided with strong teeth in chelae; walking legs generally small, slender, with- out spines; metastoma subovate to cordate; genital appendage short and pear-shaped in female, somewhat short, narrow and blunt in male.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Chelicerata
Class:
Merostomata
Subclass:
Eurypterida
Order:
Eurypterida (subclass) has no Orders
Superfamily:
Eurypteracea
Family:
Pterygotidae
Formal Genus Name and Reference:
Pterygotus AGASSIZ, 1839
Type Species:
P. problematicus
Images
(Click to enlarge in a new window)
Figs. 20,2; 22,2a-d. P. (P.) rhenaniae JAEKEL, L.Dev., Ger.; 20,2a.b, genital appendage of female, dorsal, ventral, X0.14; 20, 2e,d, genital appendage of male, dorsal, ventral, X0.14; Fig. 22,2a, dorsal, X0.45; 22,2b. chelicera, X0.7; 22,2e.d, genital appendages, male, female, X0.2 (64). --FIG. 22,2e. P. (P.) anglieus AGASSIZ, L.Dev.(Old Red Sandstone), Scot.; metastoma, X0.3 (67)
Synonyms
Geographic Distribution
Eu.-Spitz.-N.Am.-Austra
Age Range
Beginning Stage in Treatise Usage:
Ordovician
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Devonian
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Small to very large exoskeleton with dis- tinct semilunar scales; large marginal com- pound eyes; telson strongly expanded; epi- stoma present; chelicerae very large and long, provided with strong teeth in chelae; walking legs generally small, slender, with- out spines; metastoma subovate to cordate; genital appendage short and pear-shaped in female, somewhat short, narrow and blunt in male.