Chasmataspidida
- North America
- Europe
- Russia
Chasmataspidida is an extinct order within the jaw jaw carrier ( Chelicerata ).
Features
Chasmataspidida are real pine pawl carrier with a short, broad sclerite ( 1 opisthosomales segment), followed by a dreisegmentierten Preabdomen (segments 2-4) and a neunsegmentierten post-abdomen (segments 5-13).
Locations
Species of the order Chasmataspidida were in North America ( Tennessee), Europe ( Germany and Scotland ) and Russia found.
System
Some authors do not arrange the Chasmataspidida to a class, as the monophyly of Merostomata questionable and the basal relationships within the Euchelicerata is controversial. Chasmataspididas share many similarities with Xiphosura (sword tails) and Eurypterida ( sea scorpions ) and are therefore separated from Anderson & Seldon, 1997 by the Xiphosura. The team fielded by Starabogatov About Chasmataspidiformii order corresponds to the order and the order Chasmataspidida Chasmataspidiformes Chasmataspididae the family, as well as set up by Bergström superfamily Chasmataspidacea. A junior synonym of order Diploaspidida Simonetta & Delle Cave, 1978.
A distinction is currently 2 families with 7 species in 6 genera:
- Chasmataspididae Caster & Brooks, 1956 Chasmataspis Caster & Brooks, 1956 Chasmataspis laurencii Caster & Brooks, 1956
- Achanarraspis Anderson, Dunlop & Trewin, 2000 Achanarraspis reedi Anderson, Dunlop & Trewin, 2000
- Diploaspis casteri Størmer, 1972 ( = Heteroaspis novojilovi Størmer, 1972)
- Diploaspis muelleri Posch man, Anderson & Dunlop, 2005
- Forfarella mitchelli Dunlop, Anderson & Braddy, 1999
- Loganamaraspis dunlopi Tetlie & Braddy, 2004
- Octoberaspis ushakovi Dunlop, 2002
Remains an open question whether it is possible but is a representative of at Chasmataspidida a native of Siberia Eurypterus stoermeri Novojilov, 1959.