Ordovician Trilobites of the United States (alphabetized) main content.

Ordovician Trilobites of the United States (alphabetized)

Click each trilobite to learn more.

Achatella achates Acidaspis cincinnatiensis Acidaspis cincinnatiensis Acidaspis cincinnatiensis [H.o.F.] Allolichas halli Allolichas halli Amphilicas conifrons Amphilichas cornutus [H.o.F.] Amphilichas subpunctatus Anataphrus minnesotensis Anataphrus vigilans Apianurus sp. Bathyurellus teretus Bathyurus sp. Bumastoides beckeri Bumastoides billingsi Bumastoides billingsi Bumastoides holei Bumastoides porrectus Calliops armatus Calyptaulax callicephalus Calyptaulax callicephalus Calyptaulax fredericki Ceratocephala graffhami Ceraurinus icarus Ceraurinus icarus Ceraurinus icarus Ceraurus milleranus Ceraurus milleranus Ceraurus milleranus Ceraurus plattinensis Ceraurus pleurexanthemus Ceraurus pleurexanthemus Ceraurus pleurexanthemus Ceraurus sp. Ceraurus sp. Ceraurus sp. Ceraurus sp. [H.o.F.] Cryptolithoides ulrichi Cryptolithus bellulus Cryptolithus lorettensis Cryptolithus lorrainensis Cyphoproetus sp. Decoroproetus beecheri Diacanthaspis parvula Diacanthaspis sp. Dolichoharpes reticulatus Eoceraurus trapezoidalis Eomonorachus intermedius Failleana indeterminata Failleana sp. Flexicalymene granulosa Flexicalymene senaria Flexicalymene sp. Gabriceraurus dentatus Gabriceraurus mifflinensis Gabriceraurus n.sp. Gabriceraurus sp. Gravicalymene truncatus Hintzeia celsaora Homotelus bromidensis Homotelus sp. Hypodicranotus striatulus [H.o.F.] Isoteloides flexus Isotelus gigas Isotelus gigas Isotelus iowensis Isotelus maximus [H.o.F.] Isotelus sp. Isotelus sp. Isotelus walcotti Kanoshia kanoshensis Lachnostoma latucelsum Lemureops lemurei Meadowtownella crosotus Meadowtownella crosotus Meadowtownella trentonensis & Ceraurus pleurexanthemus Pandaspinapyga salsa Platycoryphe christyi Platylichas sp. Pliomerops sp. Presbynileus ibexensis Probolichas kristiae [H.o.F.] Pseudocybele altinasuta Pseudocybele nasuta Pseudomera cf. barrandei [H.o.F.] Ptyocephalus declivita Ptyocephalus yersini Raymondites spiniger Sceptaspis lincolnensis Sphaerocoryphe robusta Sphaerocoryphe sp. Thaleops laurentiana Thaleops laurentiana Thaleops laurentiana Thaleops mobydicki Triarthrus eatoni Tricopelta breviceps Trigonocerca typica Trigonocercella acuta Xylabion sp.

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