Trinucleioidea
{{Short description|Superfamily of trilobites}}
{{Use dmy dates|date=June 2024}}
{{Automatic taxobox
| fossil_range = {{Fossil range|Furongian|Silurian}}
| image = Cryptolithoides ulrichi.jpg
| image_caption = Cryptolithoides ulrichi, a trilobite in the family Trinucleidae
| taxon = Trinucleioidea
| subdivision = See text
}}
Trinucleioidea is a superfamily of trilobites. Traditionally placed within the Asaphida, it is now sometimes considered its own order, Trinucleida.{{cite journal |last1=Bignon |first1=Arnaud |last2=Waisfield |first2=Beatriz G. |last3=Vaccari |first3=Emilio |last4=Chatterton |first4=Brian D. E. |title=Reassessment of the Order Trinucleida (Trilobita) |date=2020 |url=https://www.tandfonline.com/doi/abs/10.1080/14772019.2020.1720324 |journal=Journal of Systematic Palaeontology |volume=18 |issue=13 |pages=1061–1077 |doi=10.1080/14772019.2020.1720324|bibcode=2020JSPal..18.1061B |s2cid=212995185 |url-access=subscription }}{{Cite web|url=https://www.trilobites.info/ordtrinucleida.htm|title=TRILOBITE ORDER TRINUCLEIDA FACT SHEET|website=www.trilobites.info}}
File:Damghan_Ampyx_ghobadipour_fossil_from_Lashkark_Formation,_Ordovician,_Damghan,_Iran.jpg fossil from Lashkark Formation, Ordovician, Damghan, Iran]]
Taxonomy
There are five families in the super family; they are the: Alataspididae, Dionididae, Liostracinidae, Raphiophoridae, and Trinucleidae
=Families and genera=
Alsataspididae: Ajrikina, Alataupleura, Araiopleura, Calycinoidia, Caputrotundum, Clavatellus, Falanaspis, Hapalopleura, Huamiaocephalus, Jegorovaia, Jiangxiaspis, Orometopus, Pagometopus, Palquiella, Paracalymenemene, Plesioparabolina, Pyrimetopus, Rhadinopleura, Seleneceme, Sibiriopleura, Skljarella, Spirantyx, Trigocephalus, Yumenaspis, Zacompsus.
Dionididae: Aethedionide, Digrypos, Dionide, Dionideina, Dionidella, Huangnigangia, Paradionide, Tongxinaspis, Trinucleoides.
Liostracinidae: Aplexura, Doremataspis, Liostracina, Lynaspis.
Raphiophoridae: Ampyx, Ampyxella, Ampyxina, Ampyxinella, Ampyxoides, Anisonotella, Bulbaspis, Caganaspis, Carinocranium, Cerampyx, Cnemidopyge, Collis, Edmundsonia, Ellsaspis, Endymionia, Globampyx, Jiuxiella, Kanlingia, Lonchodomas, Malinaspis, Malongullia, Mendolaspis, Metalonchodomas, Miaopopsis, Nambeetella, Nanshanaspis, Parabulbaspis, Parampyx, Pseudampyxina, Pytine, Raphioampyx, Raphiophorus, Raymondella, Rhombampyx, Salteria, Sinampyxina, Sinoluia, Taklamakania.
Trinucleidae: Anebolithus, Australomyttonia, Bancroftolithus, Bergamia, Bettonolithus, Botrioides, Broeggerolithus, Costonia, Cryptolithoides, Cryptolithus, Deanaspis, Declivolithus, Decordinaspis, Eirelithus, Famatinolithus, Furcalithus, Guandacolithus, Gymnostomix, Hanchungolithus, Huenickenolithus, Incaia, Jianxilithus, Lloydolithus, Lordshillia, Marekolithus, Marrolithoides, Marrolithus, ?Microdiscus, Myinda, Myindella, Myttonia, Nankinolithus, Ningkianolithus, Novaspis, Onnia, Paratretaspis, Paratrinucleus, Parkesolithus, Pragolithus, Protoincaia, Protolloydolithus, Reedolithus, Reuscholithus, Salterolithus, Stapeleyelta, Telaeomarrolithus, Tetrapsetlium, Tretaspis, Trinucleus, Whittardolithus, Xiushuilithus, Yinpanolithus.