Olenidae is a family of ptychopariid

trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...

s. Some genera, ''

Balnibarbi Balnibarbi is a fictional land in Jonathan Swift's 1726 satirical novel '' Gulliver's Travels''. it was visited by Lemuel Gulliver after he was rescued by the people of the flying island of Laputa. Location The location of Balnibarbi is illust ...

'' and ''

Cloacaspis ''Cloacaspis'' is an extinct genus of Olenid Ptychopariid trilobite. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago. Richard Fortey ...

'', are thought to have evolved a

symbiotic Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasit ...

relationship with sulfur-eating bacteria from which they derived nutrition.

Genera

* Acerocare * Acerocarina * Aciculolenus *

Anaximander Anaximander (; grc-gre, Ἀναξίμανδρος ''Anaximandros''; ) was a pre-Socratic Greek philosopher who lived in Miletus,"Anaximander" in ''Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 1, p. 403. a city of Ionia (in moder ...

* Angelina = Keidelaspis), * Apoplanias * Asilluchus * Baikonuraspis *

* Bienvillia (= Diatemnus; = Mendoparabolina) * Boeckaspis (/Boeckia BROGGER; = Sphaerophthalmella) * Bondarevites * Bulbolenus * Chekiangaspis *

* 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 In Greek mythology, Olenus (; Ancient Greek: Ὤλενος ''Olenos'') was the name of several individuals: *Olenus, son of Hephaestus and father of Helike and Aex, two nurses of infant Zeus. A city in Aulis was named for him. *Olenus, son of Ze ...

(= Simulolenus), * Orkekeia * Parabolina (/* Odontopyge), * Parabolinella * Parabolinina * Parabolinites * Paraolenus * Paraplicatolina * Peltocare *

Peltura ''Peltura'' is a genus of trilobites from the Upper Cambrian. The type specimen of ''Peltura scarabaeoides'', the type species of the genus, was discovered in the Alum Shale Formation of Sweden and described by the Swedish naturalist Göran Wah ...

Anthes In Greek mythology, Anthas (Ancient Greek: Ἅνθας), also Anthes (Ἅνθης), was a son of Poseidon and Alcyone, and brother of Hyperes. The brothers were eponymous founders and first kings of the cities Hyperea and Anthea in a region they rei ...

; = Anopocare), * Pelturina * Plicatolina * Plicatolinella * Porterfieldia * Prohedinella * Protopeltura * Psilocara * Remizites * Rhodonaspis * Saltaspis * Shihuigouia * Sphaerophthalmus * Svalbardites * Talbotinella *

Triarthrus ''Triarthrus'' is a genus of Upper Ordovician ptychopariid trilobite found in New York, Ohio, Kentucky, and Indiana, eastern and northern Canada, China and Scandinavia. It is the last of the Olenid trilobites, a group which flourished in the Camb ...

(/* Brongniartia EATON)? * Ullaspis * Westergaardia (= Sphaerophthalmoides) * Westergaardites * Wujiajiania.Family Olenidae
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References

External links

Olenidae
at Fossilworks Olenina Trilobite families {{Ptychopariida-stub