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 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, and flap-shaped exopods. The body terminates with a pygidium.[1]
Taxonomyedit
Thulaspsis has been consistently recovered as more closely related to the genus Squamacula that to other artiopods. However, their relationships to other artiopodans are unresolved, though analyses often recover the pair as close to the base of the group.[1]
Ecologyedit
Thulaspsis was likely a benthic animal that lived on the seafloor, though the flap-like exopods suggest that it was capable of short bursts of swimming when necessary. It likely consumed soft-bodied prey.[1]
Referencesedit
^ abcBerks, H. O.; Nielsen, M. L.; Flannery-Sutherland, J.; Nielsen, A. T.; Park, T.-Y. S.; Vinther, J. (2023). "A possibly deep branching artiopodan arthropod from the lower Cambrian Sirius Passet Lagerstätte (North Greenland)". Papers in Palaeontology. 9 (3). e1495. doi:10.1002/spp2.1495. S2CID 259253098.
January 01, 1970
thulaspis, extinct, genus, artiopodan, arthropod, from, cambrian, stage, aged, sirius, passet, site, greenland, thought, close, relative, squamacula, possibly, most, basal, members, artiopoda, temporal, range, cambrian, stage, preꞒ, scientific, classification,. 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 ThulaspisTemporal range Cambrian Stage 3 PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Domain Eukaryota Kingdom Animalia Phylum Arthropoda unranked Artiopoda Genus ThulaspisBerks et al 2023 Type species Thulaspis tholopsBerks et al 2023 Contents 1 Description 2 Taxonomy 3 Ecology 4 ReferencesDescription editThulaspsis 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 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 and flap shaped exopods The body terminates with a pygidium 1 Taxonomy editThulaspsis has been consistently recovered as more closely related to the genus Squamacula that to other artiopods However their relationships to other artiopodans are unresolved though analyses often recover the pair as close to the base of the group 1 Ecology editThulaspsis was likely a benthic animal that lived on the seafloor though the flap like exopods suggest that it was capable of short bursts of swimming when necessary It likely consumed soft bodied prey 1 References edit a b c Berks H O Nielsen M L Flannery Sutherland J Nielsen A T Park T Y S Vinther J 2023 A possibly deep branching artiopodan arthropod from the lower Cambrian Sirius Passet Lagerstatte North Greenland Papers in Palaeontology 9 3 e1495 doi 10 1002 spp2 1495 S2CID 259253098 Retrieved from https en wikipedia org w index php title Thulaspis amp oldid 1213529304, wikipedia, wiki, book, books, library,
