cephalon) of Triarthrus has opisthoparian sutures, and the right and left free cheeks that they define are yoked. The cephalon in Triarthrus is semicircular...

Ordovician) Eodalmanitina (Middle Ordovician) Trinucleus (Middle Ordovician) Triarthrus (Late Ordovician) Most Early Silurian families constitute a subgroup of...

coupled with low organic carbon and low organic sulfur. The trilobite Triarthrus eatoni comprises 85% of the organisms sampled at the locality, other taxa...

closely related to Artiopoda in some analyses. Restoration of the trilobite Triarthrus eatoni Fossils of Naraoia compacta (Nektaspida) Life restoration of Sidneyia...

Temporal range: Cambrian–Recent PreꞒ Ꞓ O S D C P T J K Pg N Fossil of Triarthrus eatoni, a trilobite Cherax wagenknechtae, a crustacean mandibulate Scientific...

Pyritized specimen of the brachiopod Paraspirifer bownockeri Pyritized Triarthrus eatoni from Whetstone Gulf Formation Pyritized Furcaster paleozoicus from...

A pair of Triarthrus trilobites with pyritized soft-tissue...

diomedeae (Faxon, 1893) Haliporoides sibogae (De Man, 1907) Haliporoides triarthrus (Stebbing, 1914) "WoRMS - World Register of Marine Species - Haliporoides...

Ellipsocephaloididae Family Olenidae Superfamily Incertae sedis Genus Triarthrus Wikimedia Commons has media related to Olenina. "Order - Ptychopariida...

is known from the Eastern Tian Shan (Central Asia). It is related to Triarthrus, but can easily be distinguished from it by an extremely long exoskeleton...

A Triarthrus eatoni with preserved appendages. From upper New York, United States...

Rhodonaspis Saltaspis Shihuigouia Sphaerophthalmus Svalbardites Talbotinella Triarthrus (/*Brongniartia EATON)? Ullaspis Westergaardia (=Sphaerophthalmoides)...

tenuicosta †Strophomena titan †Syringopora †Tentaculites †Tetradium †Triarthrus †Triarthrus eatoni The Paleobiology Database records no known occurrences of...

minuitissima †Thamnoptychia silicensis †Trematis †Trematis rugosa †Triarthrus †Triarthrus eatoni †Trigonacarpolithus †Trigonacarpolithus typicus †Trigonocarpus...

†Subulites †Syringopora †Taxocrinus †Tetradium †Theelia †Treptoceras †Triarthrus †Triarthrus eatoni †Triendoceras – tentative report †Trocholites †Ulrichicrinus...

type locality for species †Trepospira †Trepospira illinoisensis †Triarthrus †Triarthrus becki †Tricrepicephalus †Tricrepicephalus arcuatus – type locality...

=Triangullina) Trianguraspis Triarthrella Triarthroides Triarthropsis Triarthrus (=Brongniartia) Tricopelta Tricrepicephalus (=Paracrepicephalus) Trifonella...

†Tarphyceras †Tentaculites †Tetradium †Tetraxylopteris †Tornoceras †Triarthrus †Triarthrus eatoni †Triendoceras †Trimerus †Trochoceras †Trocholites †Truyolsoceras...

the Cambrian Olenoides serratus and on the gill shaft of the Ordovician Triarthrus eatoni, and interpret these setae as likely used to groom the gills of...

report †Teichichnus †Tentaculites †Tetradium †Tornoceras †Treptoceras †Triarthrus †Triendoceras – tentative report †Trocholites †Tuditanus – type locality...

Triarthrus eatoni, one of the last ptchopariids....

†Tentaculites †Tetraxylopteris †Titusvillia – type locality for genus †Triarthrus †Tricrepicephalus †Trimerus †Tubulella †Tuzoia †Urasterella †Vinella †Wanneria...

Cincinnatian Series, which includes the Kope Formation. The trilobites such as Triarthrus eatoni, Cryptolithus tessellatus, and Proetidella parviusculus have been...

†Syringopora †Taeniocrada †Teganium †Tentaculites †Tetradium †Tetragraptus †Triarthrus †Uraloceras †Uraloceras burtiense †Uraloceras fedorowi †Uraloceras involutum...

brachiopod Leptolobus, rhynchonellatan brachiopod Camarotoechia and trilobite Triarthrus. List of eurypterid genera Timeline of eurypterid research Caster, Kenneth...

Arts and Sciences. 7: 1–169. Beecher, C.E. (1893a). "A larval form of Triarthrus". American Journal of Science. 46 (275): 361–362. Bibcode:1893AmJS...46...

†Subulites †Syringopora †Tentaculites †Tetragraptus †Tetrataxis †Thoracocare †Triarthrus †Trinodus †Trocholites †Tuzoia †Tylonautilus †Uraloceras †Uraloceras burtiense...

†Trematospira perforata – or unidentified comparable form †Triarthrus †Triarthrus becki †Triarthrus eatoni †Tricornina †Triendoceras †Triendoceras orthoseptatum...

†Treptoceras cincinnatiensis †Treptoceras duseri †Treptoceras transversum †Triarthrus †Triarthrus eatoni †Triboloporus †Triboloporus cryptoplicatus †Triendoceras...

†Trepospira – tentative report †Triaenosphaera †Triaenosphaera hebes †Triarthrus †Trigonirhynchia †Trigonirhynchia ventricosa – or unidentified related...