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
- Boeckaspis
- Bondarevites
- Bulbolenus
- Chekiangaspis
- Cloacaspis
- Ctenopyge
- Cyclognathina
- Danarcus
- Desmetia
- Eoctenopyge
- Euonchonotina
- Eurycare
- Granitzia
- Hancrania
- Helieranella
- Highgatella
- Huangshiaspis
- Hunanolenus
- Hypermecaspis,
- Inkouia,
- Isidrella
- Jujuyaspis,
- Leiobienvillia
- Leptoplastides,
- Leptoplastus
- Leurostega
- Magnomma
- Mesoctenopyge
- Moxomia
- Neoolenus
- Neoparabolina
- Nericiaspis
- Olenus,
- Orkekeia
- Parabolina,
- Parabolinella
- Parabolinina
- Parabolinites
- Paraolenus
- Paraplicatolina
- Peltocare
- Peltura,
- Pelturina
- Plicatolina
- Plicatolinella
- Porterfieldia
- Prohedinella
- Protopeltura
- Psilocara
- Remizites
- Rhodonaspis
- Saltaspis
- Shihuigouia
- Sphaerophthalmus
- Svalbardites
- Talbotinella
- Triarthrus ?
- Ullaspis
- Westergaardia
- Westergaardites
- Wujiajiania.
