Olenidae

Olenidae is a family of ptychopariid trilobites. Some genera, Balnibarbi and Cloacaspis, are thought to have evolved a symbiotic relationship with sulfur-eating bacteria from which they derived nutrition.

Genera

 * Acerocare
 * Acerocarina
 * Aciculolenus
 * Anaximander
 * Angelina (=Keidelaspis),
 * Apoplanias
 * Asilluchus
 * Baikonuraspis
 * Balnibarbi
 * Bienvillia (=Diatemnus; =Mendoparabolina)
 * Boeckaspis (/Boeckia BROGGER; =Sphaerophthalmella)
 * Bondarevites
 * Bulbolenus
 * Chekiangaspis
 * Cloacaspis
 * Ctenopyge
 * Cyclognathina
 * Danarcus
 * Desmetia
 * Eoctenopyge
 * Euonchonotina
 * Eurycare
 * Granitzia
 * Hancrania
 * Helieranella
 * Highgatella
 * Huangshiaspis
 * Hunanolenus
 * Hypermecaspis (=Spitsbergaspis),
 * Inkouia (=Agalatus),
 * Isidrella
 * Jujuyaspis (=Alimbetaspis),
 * Leiobienvillia
 * Leptoplastides (=Andesaspis;=Beltella; =Chunkingaspis; =Parabolinopsis; *Rampartaspis),
 * Leptoplastus
 * Leurostega
 * Magnomma
 * Mesoctenopyge
 * Moxomia
 * Neoolenus
 * Neoparabolina
 * Nericiaspis
 * Olenus (=Simulolenus),
 * Orkekeia
 * Parabolina (/*Odontopyge),
 * Parabolinella
 * Parabolinina
 * Parabolinites
 * Paraolenus
 * Paraplicatolina
 * Peltocare
 * Peltura (/Anthes; =Anopocare),
 * Pelturina
 * Plicatolina
 * Plicatolinella
 * Porterfieldia
 * Prohedinella
 * Protopeltura
 * Psilocara
 * Remizites
 * Rhodonaspis
 * Saltaspis
 * Shihuigouia
 * Sphaerophthalmus
 * Svalbardites
 * Talbotinella
 * Triarthrus (/*Brongniartia EATON)?
 * Ullaspis
 * Westergaardia (=Sphaerophthalmoides)
 * Westergaardites
 * Wujiajiania.