Olenidae
# 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.
