Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: †Trilobita
Ordo: †Ptychopariida
Subordo: †Ptychopariina
Superfamilia: Ellipsocephaloidea
Familiae: Agraulidae - Aldonaiidae - Bigotinidae - Chengkouiidae - Ellipsocephalidae - Estaingiidae - Palaeolenidae - Yunnanocephalidae
Stratigraphic Extension
Lower Cambrian --> Middle Ordovician
Ellipsocephaloidea is a superfamily of trilobites that lived during the Cambrian period. It was first described by Lin in 1990.
Taxonomy
According to the Fossilworks database, Ellipsocephaloidea belongs to the order Redlichiida and includes several families, such as Agraulidae, Bigotinidae, Ellipsocephalidae, Estaingiidae, Palaeolenidae, and Yunnanocephalidae, although it is now thought the superfamily is within the Ptychopariida[1]
Agraulidae
Agraulidae is a family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are characterized by their large size and distinctive cephalic features.
Bigotinidae
Bigotinidae is another family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are known for their small size and elongated body shape.
Ellipsocephalidae
Ellipsocephalidae is a family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are characterized by their oval-shaped cephalon and distinctive thoracic segments.
Estaingiidae
Estaingiidae is a family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are known for their large size and distinctive pygidium.
Palaeolenidae
Palaeolenidae is a family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are characterized by their small size and distinctive cephalic features.
Yunnanocephalidae
Yunnanocephalidae is a family of trilobites within the superfamily Ellipsocephaloidea. Members of this family are known for their large size and distinctive thoracic segments.
Ecology
These trilobites were fast-moving low-level epifaunal deposit feeders.
References
[2][3][4]
"ORDER PTYCHOPARIIDA".
Repositórios e Sistemas de Registro Eletrônico em Saúde, 2.ed. Cegraf UFG. 2022-01-16. ISBN 978-85-495-0641-2.
"The Paleobiology Database". paleobiodb.org. Retrieved 2023-08-06.
"--- The Palaeontological Society of India [INDIA] ---". palaeontologicalsociety.in. Retrieved 2023-08-06.
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