Lobopodia
Group of extinct worm-like animals with legs / From Wikipedia, the free encyclopedia
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Lobopodians are members of the informal group Lobopodia[3] (from the Greek, meaning "blunt feet"), or the formally erected phylum Lobopoda Cavalier-Smith (1998).[4] They are panarthropods with stubby legs called lobopods,[5] a term which may also be used as a common name of this group as well.[6][7] While the definition of lobopodians may differ between literatures,[8] it usually refers to a group of soft-bodied, marine worm-like fossil panarthropods such as Aysheaia and Hallucigenia.[9][5][10]
Lobopodia | |
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Reconstruction of various lobopodians. 1: Microdictyon sinicum, 2: Diania cactiformis, 3: Collinsovermis monstruosus, 4: Luolishania longicruris, 5: Onychodictyon ferox, 6: Hallucigenia sparsa, 7: Aysheaia pedunculata, 8: Antennacanthopodia gracilis, 9: Facivermis yunnanicus, 10: Paucipodia inermis, 11: Jianshanopodia decora, 12: Hallucigenia fortis | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Subkingdom: | Eumetazoa |
Clade: | ParaHoxozoa |
Clade: | Bilateria |
Clade: | Nephrozoa |
(unranked): | Protostomia |
Superphylum: | Ecdysozoa |
(unranked): | Panarthropoda |
Phylum: | †"Lobopodia" Snodgrass 1938 |
Groups included | |
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Cladistically included but traditionally excluded taxa | |
Crown-group Euarthropoda | |
Synonyms | |
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The oldest near-complete fossil lobopodians date to the Lower Cambrian; some are also known from Ordovician, Silurian and Carboniferous Lagerstätten.[11][12][13] Some bear toughened claws, plates or spines, which are commonly preserved as carbonaceous or mineralized microfossils in Cambrian strata.[14][15] The grouping is considered to be paraphyletic, as the three living panarthropod groups (Arthropoda, Tardigrada and Onychophora) are thought to have evolved from lobopodian ancestors.