Prehistoric arthropod Introduction

Source: Wikipedia. Pages: 33. Chapters: Eurypterus, Arachnomorpha, Erettopterus, Kiisortoqia, Megalograptus, Hurdia, Stigmellites, Marywadea, Aglaspidida, Ceratiocaris, Choristotanyderus, Great appendage, Megarachne, Ainiktozoon, Pulmonoscorpius, Mesolimulus, Carcinosoma, Protichnites, Odaraia, Euthycarcinoida, Eumorphocorystes, Carcinosomatidae, Vladicaris, Branchinecta barstowensis, Stylonurina, Rhyniella praecursor, Eophrynus, Mesokristensenia, Forfexicaris, Euproops, Salteropterus, Brontoscorpio, Onychopterella, Stylonuridae, Archaeoniscus, Mixopterus, Aphthoroblattina, Leanchoilia, Tylopterella, Campylocephalus, Echinognathus, Grossopterus, Megalograptidae, Waptia, Melbournopterus, Nakridletia, Ctenopterus, Centipedes of the Mazon Creek fossil beds, Priscansermarinus, Mecochirus longimanatus, Strobilopterus, Tarsopterella, Lunataspis, Dolichopteridae, Archaeolepis, Plenocaris, Stylonurus, Icriocarcinus, Ciliopagurus obesus, Pygocephalomorpha, Anthracomartidae, Palaeocarpilius, Aphodiites, Etyiidae, Archimylacris, Lobocarcinus, Tuzoia, Arthrolycosa, Eophrynidae, Lepidoderma, Mycterops, Mycteropidae, Rhenopteridae, Myriacantherpestes, Weiwoboa, Tyulkinia, Cryptomartus hindi, Kodymirus, Protorthoptera, Kockurus, Manobiomorpha, Paleophaedon, Acanthomeridion, Psyllototus, Iliella spinosa, Occacaris, Eocarcinoidea, Terataspis, Jerseyempheria, Rhenopterus, Pterygotoidea, Ceratodacus priscus, Emeraldella, Hastimima, Lichnomesopsyche, Urokodia, Asmussia murchisoniana, Kiaeria, Perspicaris, Sanctipaulus mendesi, Vitimopsyche, Euphoberia, Delitzschala, Elleria, Rhinocarcinosoma, Microchela, Beckwithia, Archaeogeryon, Burgessia, Synziphosurine, Meganeuropsis, Paraisobuthus, Helmetia, Phytophilaspis, Archeolimulus, Gerarus, Camptoneurites, Palaeophonus, Liomesaspis, Megacheira, Pseudoniscus, Palaeopagurus, Habelia, Portunites, Casterolimulus, Austrolimulus, Skania, Saurophthirus, Xaniopyramis, Nicrophorus pliozaenicus, Protophasma, Namurotypus, Victalimulus, Eoarthropleura, Carnarvonia, Merostomoidea, Liangshanella, Tealliocaris, Protoparevania, Stenophlebia, Megatypus, Marrellomorph, Angarocaris, Protocaris, Palmichnium, Blapsium, Aglaspis, Libellulium, Mollisonia, Molaria, Myoscolex, Aglaspoides, Liwia. Excerpt: Eurypterus (meaning wide wing or broad paddle) is an extinct genus of sea scorpion of the late Silurian period, inhabiting muddy bottoms about , in what is now the United States. Eurypterus model, exhibited in Smithsonian National Museum of Natural History: Hall of Fossils Eurypterus lacustris fossil, Muséum national d'histoire naturelle, Paris Eurypterus remipesEurypterus remipes is the state fossil of New York. Eurypterus was a member of the family Eurypteridae, which lived from the Ordovician to the Late Carboniferous period. Eurypteridae were characterized by small to large exoskeletons with inconspicuous semilunar scales or curved ridges. The telson, (tail) was styliform, or pointed. Eurypteridae also had chelae (appendages in front of the mouth) that were small. Their walking legs were covered in spines. The prosoma (head) was subrectangular, with slightly curved compound eyes located relatively centrally on the dorsal surface. Genital appendages in the female were very short with lateral lobes in the female, but long in the male, with diverging distal spines. Eurypterus is distinguishable from other Eurypteridae by "postlateral prolongations" on the back corners of the pretelson (the last free body segment befo...