†order Ptychopariida Swinnerton 1915 (trilobite)

Trilobita - Ptychopariida

Parent taxon: Trilobita according to E. Landing et al. 2008

See also Bengtson 1992, Briggs et al. 2008, Harrington and Leanza 1957 and Sepkoski 2002

Sister taxa: Abakanopleura, Acanthocephalus, Acantholenus, Acastoidea, Acrohybus, Adelogonus, Aglagalia, Agnostida, Agraulaeva, Aguaraya, Aidarella, Alomataspis, Altajaharpes, Altiplanelaspis, Amechilus, Amginouyia, Ampellatocephalina, Anacopodia, Antagmopleura, Antatlaeva, Atratebia, Aulacopleurida, Avalonia, Avascutellum, Barklyella, Bathynotellus, Bathynotidae, Beikedamaspis, Bergerolimbus, Bicornipyge, Blayacina, Bondarevites, Brevitermierella, Bridgeia, Cambrunicornia, Carmon, Catadoxides, Chakasskia, Chinensis, Chondroparia, Conoides, Cornovica, Corynexochida, Costonia, Crossoura, Crucicephalus, Curiaspis, Cuyanaspis, Cyclolenzellina, Dalmanites troosti, Deltacare, Edganocare, Ellipsuella, Ellsaspis, Entomostracites, Entsyna, Eosaukia, Esseigania, Eulomella, Eutrilobita, Fabulaspis, Folliceps, Fritzaspis, Galahetes, Gelasene, Gentilapsis, Gigmpeltis, Gigoutella, Giordanella, Gogoella, Goycoia, Hamashania, Hapalopleuridae, Harpetida, Hercantyx, Hicksia, Howelluella, Indigestus, Indiligens, Ishpella, Issafenia, Issafeniella, Iveria, Iwayaspis, Jonotus, Jubileia, Judaiella, Juriietella, Kamlacus, Kanfuqingia, Kazellina, Keeleaspis, Kerbinella, Kinsabia, Knechtelia, Kolpura, Kujandina, Latilorenzella, Latoucheia, Leptopilus, Levisia, Libristoma, Lichida, Liriamnica, Lomsucaspis, Lotosoides, Loxonepea, Loxopeltis, Lusampa, Mannschreckia, Mataninella, Mecophrys, Megalaspidicus, Megalurites, Meisterella, Meneghinella, Metapopristis, Microdiscus, Missisquoiidae, Moretarva, Namanoiidae, Naraoiida, Nehanniaspis, Nelsonia, Neomalungia, Ninaspis, Norina, Odontopleurida, Ogygiocaridinae, Olenellida, Opisthoparia, Ordosiidae, Orictocara, Orienturus, Otekmaspis, Otenaspella, Ourikaia, Oxygonaspis, Paichiashania, Palaeolentus, Palmeraspis, Paraplagiura, Paraplesiograulos, Pararania, Peculicephalina, Perissopyge, Phacopida, Piliolites, Planolimbus, Pliomerellus, Poculicephalina, Polycyrtaspididae, Priceaspis, Proetida, Proparia, Pseudoacicaudus, Pseudoclelandia, Pseudocrecephalaspina, Pseudoliostracina, Pseudosalteria, Pseudotermierella, Ptyttstrigis, Punctaspis, Pyraustocranium, Redlichaspis, Redlichiida, Remopleuridacea, Resseria, Resseropsis, Rochaeva, Rowia, Sailycaspis, Sarkiidae, Scutelluidae, Sectigena, Sekwiaspis, Selenocoryphe, Serksia, Serksioides, Sibiriopeltis, Smeathenia, Sphaerocare, Spizharaspis, Stittaspis, Sunaspididae, Synhomalonotus, Tadakoustia, Taidonorus, Taplimella, Tazemmourtia, Thymurus, Tongxingaspis, Toxotis, Trapezocephalina, Trilobus, Trinia, Tuyunaspis, Ullaspis, Ulrickaspis, Validaspis, Variopelta, Volonellus, Whittardolithus, Winsteria, Zigzuella

Subtaxa: Acanthometopus Acanthopleurella Acrocephalitidae Acrodirotes Agraulopsis Aldonaiidae Alekcinella Amicus Amphorella Amquia Amzasskiella Anabaraspis Anemocephalops Anemocephalus Angustaeva Anopocodia Antagmidae Antatlasia Anuloides Apomodocia Aposolenopleura Argunaspis Arraphus Asaphiscidae Ascionepea Asilluchus Atopidae Aulacodigma Avonina Badainjaranaspis Baikonuraspis Batchatiella Bemaspis Beothuckia Biavertia Bicella Bifodina Bigotina Bigotinella Bigotinidae Biscoia Blainiopsis Bolaspidellus Bolaspididae Brassicicephalus Brutaspis Bucksella Bulnibarbi Bvalbardites Cainatops Catasolenopleura Catillicephalidae Cedaraspis Cedarellus Cedariidae Champlainia Changshaniidae Changshanocephalus Chondrastaulina Chosenia Chuangiformis Chulanolenus Ciliocephalus Ciliscutellum Coenaspis Collyrolenus Conococheaquea Conocoryphidae Conokephalinidae Corbina Craigheadia Crepicephalidae Crepichilella Crusoia Culmenaspis Cyclognathina Damaiaoaspis Dananzhuangaspis Decus Delleana Diceratocephalidae Didwudina Dipyrgotes Dokimocephalidae Dolgaia Dunderbergella Ejinaspis Elatius Eldoradia Ellipsocephalidae Ellipsocephaloididae Ellipsostrenua Elviniidae Elvinoides Elviraspis Enammocephalus Erdoradites Estaingiidae Eulomidae Eurostina Eurycare Faciura Ferralsia Fissocephalus Galeaspis Gaotanaspis Gloria Glyptometopus Groenwallia Habrocephalus Hanivella Harpidoides Hartshillina Hatangia Helieranella Henadoparia Hidascutellum Hindermeyeria Holasaphus Holocephalinidae Houmengia Huaibeia Huainania Hupeia Hyperoparia Idiorapha Ignotogregatus Inoyellaspis Interalia Iohomia Irinia Irvingelloides Isocolidae Ityophoridae Janxilithus Jessievillia Jiangjunshania Jiangsuaspis Jiangsucephalus Kabukiia Kameschkoviella Karagandoides Kasatchaspis Kaufmannella Kazelina Kepisis Kingstoniidae Kirengelia Kirkdomina Komaspis Kounamkites Krolina Lauzonella Lecanoaspis Lecanopleura Leioscutellum Leocephalus Leptoplastus Limpeina Liocare Liopelta Liosolenopleura Lisaniidae Litaspis Llanoaspididae Lochmanaspis Loganopeltis Lonchocephalidae Lorenzellidae Luaspis Lunacephalus Luottuolingia Luxella Luyanhaoia Lydiaspis Macelloura Magnacephalus Magnomma Malinaspis Manchurocephalus Mapaniidae Megadunderbergia Megalopsis Meniscocorphye Menomoniidae Mesetaia Metisaspina Metisaspis Michaspis Miranda Mundocephalina Munijia Nambeetella Nassovia Natmus Neoacrocephalites Neoanomocerella Neohedinaspis Neoshirakiella Neosolenopleurella Neotaenicephalus Nepeidae Nericiaspis Nilcgna Norwoodiidae Obrucheviaspis Octobronteus Olekmaspis Olenidae Olenina Onchopeltis Orlovia Orloviella Ottenbyaspis Ouijjania Palaeolenidae Palaeolenides Papyriaspididae Papyriaspis Parabathycheilus Paracrocephalites Paraenshia Paraeosoptychoparia Parairvingella Parakingasidoides Paralorenzella Paramicmacca Paranumia Paraolenus Parapachyaspis Parapeishania Paratermierella Paratretaspis Patronaspis Pedinaspis Peishania Pelturina Periommella Perioura Pesaia Petruninaspis Phylacteridae Platyharpes Plethopeltidae Polycertaspis Populsenella Proasaphiscidae Proaulacopleura Propatokephalops Propeltura Protagraulos Protohedinia Pruvostinoides Pseudatops Pseudoalokistocare Pseudokadyella Pseudolenus Pseudomexicella Pseudosolenopleura Ptychopariidae Ptychopariina Ptychoparoides Ptychoparopsis Pyttstrigis Qingshuihella Rampartaspis Randicephalus Rasettaspis Raymondinidae Regius Remizites Rinconia Sagitaspis Sagitoides Salankanaspis Sangzhiscutellum Schoriella Schyilaspis Seletoides Semicyclocephalus Shenjiawania Shumardiidae Shumardops Sinocrepicephalus Solenopleuracea Stella Striticephala Talbotinella Tatulaspis Tengfengiidae Termieraspis Tholus Torridella Tosotychia Triarthrella Triarthroides Tricrepicephalidae Trinucleina Tuberaspis Urbanaspis Urjungaspis Utiidae Varanella Verkholenella Wangzishia Whittingtonella Wilsonarella Wongia Xianquianaspis Yabeia Yohoaspis Yuehsieszella Yunnanocephalidae

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Ecology: fast-moving low-level epifaunal carnivore

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