Achanarraspis reedi
| Achanarraspis reedi | ||||||||||||
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| Temporal occurrence | ||||||||||||
| middle Devonian | ||||||||||||
| 393.3 to 387.7 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Achanarraspis | ||||||||||||
| Anderson , Dunlop & Trewin , 2000 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Achanarraspis reedi | ||||||||||||
| Anderson , Dunlop & Trewin , 2000 |
Achanarraspis reedi is an extinct species from the order Chasmataspidida of the jaw-claw bearers (Chelicerata).
features
The prosoma is significantly larger than the preabdomen , almost trapezoidal and runs laterally in small spines. The preabdomen is wide with rounded margins, segmentation is difficult to determine, but weak, curved transverse lines in the fossil are likely the tergite boundaries . The post-abdomen is long, tapers backwards and ends in a short telson .
etymology
The generic name Achanarraspis is made up of Achanarras , after the place where it was found, and the Greek word aspis for shield. Actually, the genus should be called Achanarrella due to its similarity to Forfarella , but this was discarded because of the risk of confusion with the jawless Achanarella . The specific epithet was chosen in honor of John Reed, who found the only specimen of this species.
Location
Only one specimen of this species has been found in the Achanarras quarry in Caithness , Scotland . The holotype is now in the University of Aberdeen .
Systematics
Achanarraspis reedi is a member of the Diploaspididae family from the order Chasmataspidida .
swell
literature
- LI Anderson, JA Dunlop, NH Trewin: A Middle Devonian chasmataspid arthropod from Achanarras Quarry, Caithness, Scotland . Scottish Journal of Geology 36, 200: 151-158. PDF