| 词条 | Dolichopterus |
| 释义 |
| name = Dolichopterus | fossil_range = {{fossil range|Late Silurian}} | image = Dolichopterus macrochirus.JPG | image_width = 250px | image_caption = D. macrocheirus fossil | regnum = Animalia | phylum = Arthropoda | subphylum = Chelicerata | ordo = †Eurypterida | superfamilia = †Eurypteroidea | type_species = Dolichopterus macrocheirus | type_species_authority = Hall, 1859 | subdivision_ranks = Other species | subdivision =
| familia = †Dolichopteridae | genus = †Dolichopterus | genus_authority = Hall, 1859 }}Dolichopterus is a genus of the prehistoric sea scorpions, arthropods in the order Eurypterida. Dolichopterus contains four species, all from the Late Silurian. Three species (D. jewetti, D. macrocheirus and D. siluriceps) have been recovered from New York, United States and one (D. gotlandicus) has been recovered from Gotland, Sweden.[1] DistributionIt lived in the Late Silurian (around {{Ma|420}}) in shelf or epicontinental seas of the region where Avalonia, Baltica and Laurentia met during the Caledonian orogeny; its fossils have been found in modern-day North America and the Baltic region. They were about {{convert|25|-|30|cm|0}} long. DescriptionDolichopteridae, which lived in the Silurian and Devonian periods, had outer surfaces that were either smooth with pustules and semilunar scales. Their compound eyes were arcuate and located anteriorly on the prosoma (head). Their abdomens had epimers (lateral projections). The telson, (tail) was lanceolate. Their chelicerae were small, and the first three pairs of walking lags were stout, with powerful spines. The last pair of walking lags had supplementary lobes, while the swimming lags had the last joint enlarged, as part of the paddle. The male genital appendage was long.[2]Dolichopterus is distinguishable by its nearly smooth outer surface; its subquadrate prosoma (head), and the slightly serrated margins on the distal joints and lobes of the swimming legs.[2]References1. ^Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). 2. ^1 {{cite book |author=L. Størmer |year=1955 |chapter=Merostomata |title=Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata |page=39 |isbn=0-8137-3016-3}} See also
7 : Eurypteroids|Prehistoric chelicerate genera|Silurian eurypterids|Fossils of Canada|Fossil taxa described in 1859|Eurypterids of Europe|Eurypterids of North America |
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