Diploperculata

Infraorder of arthropods

Diploperculata Temporal range: Middle Ordovician - Early Permian, 467.3–283.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Reconstruction of Jaekelopterus rhenaniae.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Order:	†Eurypterida
Suborder:	†Eurypterina
Infraorder:	†Diploperculata Lamsdell, Hoşgör & Selden, 2013
Superfamilies
†Adelophthalmoidea †Carcinosomatoidea †Pterygotioidea †Waeringopteroidea

Diploperculata is an infraorder of eurypterids, an extinct group of aquatic arthropods commonly known as "sea scorpions". The name, derived from Greek διπλόω ("double") and operculum, refers to the distinguishing feature that unites the superfamilies included in the group, that the genital operculum is made up of two fused segments.^[1]

The group contains the three eurypterine superfamilies Carcinosomatoidea, Adelophthalmoidea and Pterygotioidea alongside the as of yet undescribed "waeringopteroid" clade.^[2] The diploperculate eurypterine clade had prior to its description been noted as a monophyletic group of derived eurypterines that form a sister-taxon to the superfamily Eurypteroidea.^[3]

References

^ Lamsdell, James; Hoşgör, Izzet; Selden, Paul (2013-01-31). "A new Ordovician eurypterid (Arthropoda: Chelicerata) from southeast Turkey: Evidence for a cryptic Ordovician record of Eurypterida". Gondwana Research. 23 (1): 354–366. Bibcode:2013GondR..23..354L. doi:10.1016/j.gr.2012.04.006.
^ Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch , version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF).
^ Erik Tetlie, O; B. Cuggy, Michael (2007-09-01). "Phylogeny of the basal swimming eurypterids (Chelicerata; Eurypterida; Eurypterina)". Journal of Systematic Palaeontology. 5 (3): 345–356. doi:10.1017/S1477201907002131. S2CID 88413267.

Eurypterids

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Clade: Euchelicerata
Clade: Prosomapoda
Clade: Planaterga
Clade: Dekatriata
Clade: Sclerophorata

Taxonomy

Genera

List of eurypterid genera

Suborder
Stylonurina

Rhenopteroidea	Rhenopteridae
Stylonuroidea	Parastylonuridae Stylonuridae
Kokomopteroidea	Kokomopteridae Hardieopteridae
Mycteropoidea	Drepanopteridae Hibbertopteridae Mycteroptidae

Suborder
Eurypterina

Onychopterelloidea

Onychopterellidae

Moselopteroidea

Moselopteridae

Eurypteroidea

Infraorder
Diploperculata

Carcinosomatoidea	Carcinosomatidae Megalograptidae Mixopteridae
Waeringopteroidea	Waeringopteridae
Adelophthalmoidea	Adelophthalmidae
Pterygotioidea	Hughmilleriidae Slimonidae Pterygotidae