Megalograptidae
| Megalograptidae Temporal range: Ordovician |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Merostomata |
| Order: | †Eurypterida |
| Suborder: | †Eurypterina |
| Superfamily: | †Megalograptoidea |
| Family: |
†Megalograptidae Caster & Kjellesvig-Waering, 1955 |
| Species | |
|
See text |
|
See text
Megalograptidae is an extinct family of eurypterids.
Megalograptids are characterized by large exoskeletons with ovate to triangular scales. The prosoma (head) is subquadrate, with a tonguelike anterior process bearing marginal spines, and compound eyes on the top front of the head. The chelicerae (claws in front of the mouth) are small and short. The first and third pairs of walking legs are short, with diverging or closely spaced spines. The second pair of walking legs is enormously developed, with long paired spines. The fourth pair of walking legs are nearly spineless. The preabdomen, the front portion of the body, is narrow with axial furrows, while the postabdomen is moderately narrow with broad, flat and curved appendages on the last body segment. The telson is short and lanceolate.
...
Wikipedia