Thulaspis
From Wikipedia, the free encyclopedia
| Thulaspis Temporal range: | |
|---|---|
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| Holotype specimen | |
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| Reconstruction | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Genus: | †Thulaspis Berks, et al. 2023 |
| Type species | |
| Thulaspis tholops Berks, et al. 2023 | |
Thulaspis is an extinct genus of artiopodan arthropod from the Cambrian Stage 3 aged Sirius Passet site in Greenland. It is thought to be a close relative of Squamacula, and is possibly one of the most basal members of Artiopoda.
Thulaspsis was relatively large-sized. The largest specimen is about 8.7 centimetres (3.4 in) wide and 12 centimetres (4.7 in) long. The carapace is overall oval-shaped was convex and likely stiff in life, with a raised central axis. The head is broad and bears a pair of antennae, which have at least 20 rectangular segments, and likely two pairs of biramous (two branched) limbs.The body has 15 thoracic segments, which curve forwards in the first few segments, before becoming straight in the fourth and fifth segments, then increasingly posteriorly curved in subsequent segments. At least the first 11 thoracic segments are associated with pairs of biramous limbs. The biramous limbs have robust endopods (lower, leg-like branches), and flap-shaped exopods (upper branches). The body terminates with a pygidium.[1]
