Loganamaraspis dunlopi
| Loganamaraspis dunlopi | ||||||||||||
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| Temporal occurrence | ||||||||||||
| middle Silurian | ||||||||||||
| 438.5 to 430.5 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Loganamaraspis | ||||||||||||
| Tetlie & Braddy , 2004 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Loganamaraspis dunlopi | ||||||||||||
| Tetlie & Braddy , 2004 |
Loganamaraspis dunlopi is an extinct species from the order Chasmataspidida of the jaw-claw bearers (Chelicerata).
features
Loganamaraspis dunlopi was a large member of the Diploaspididae family (35 mm long). The prosoma was almost square (length / width ratio 0.75) and somewhat elongated towards the rear. The preabdomen consisted of 3 curved segments, which ended in shorter, tight-fitting spines. The post abdomen was long and pointed (segment 5 / segment 13 ratio about 2.5). The telson was short and pointed. The metastome was heart-shaped.
The eyes and other dorsal structures have not been preserved. Except for the long 5th extremity, which was probably a running leg, all the others have only survived in fragments.
etymology
The generic name Loganamaraspis is composed of Logan , after the place where it was found, the Latin word amare for love, after the heart-shaped metastome, and the Greek word aspis for shield. The specific epithet was chosen in honor of Robert Dunlop, the discoverer of this species, and Jason A. Dunlop , who works in the field of Chasmataspidida.
Location
Only one specimen of this species has been found in the Patrick Burn Formation near Logan Water, Ayrshire , Scotland .
Systematics
Loganamaraspis dunlopi is the only Silurian member of the Diploaspididae family of the order Chasmataspidida .
swell
literature
- OE Tetlie, SJ Braddy: The first Silurian chasmataspid, Loganamaraspis dunlopi gen. Et sp. nov. (Chelicerata: Chasmataspidida) from Lesmahagow, Scotland, and its implications for eurypterid phylogeny . Transactions of the Royal Society of Edinburgh: Earth Sciences 94, 2004: 227-234. PDF