Sessilia

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Cladus: Pancrustacea
Superclassis: Multicrustacea
Classis: Thecostraca
Subclassis: Cirripedia
Superordo: Thoracica
Ordo: Sessilia
Subordines: Balanomorpha - Brachylepadomorpha - Verrucomorpha
Vernacular names
中文: 无柄目

Sessilia is an unranked clade of barnacles, comprising the barnacles without stalks, or acorn barnacles. They form a monophyletic group and are probably derived from stalked or goose barnacles.[3] Sessilia is divided into two orders. The Verrucomorpha contain two families, Verrucidae and Neoverrucidae, and the remaining 14 families are in the order Balanomorpha.[4][2][5]
References

"Sessilia Lamarck, 1818". Integrated Taxonomic Information System. Retrieved October 14, 2010.
Chan, Benny K. K.; Dreyer, Niklas; Gale, Andy S.; Glenner, Henrik; et al. (2021). "The evolutionary diversity of barnacles, with an updated classification of fossil and living forms". Zoological Journal of the Linnean Society. 193 (3): 789–846. doi:10.1093/zoolinnean/zlaa160.
Marcos Pérez-Losada; Jens T. Høeg; Keith A. Crandall (2004). "Unraveling the evolutionary radiation of the thoracican barnacles using molecular and morphological evidence: a comparison of several divergence time estimation approaches" (PDF). Systematic Biology. 53 (2): 244–264. doi:10.1080/10635150490423458. PMID 15205051.
Martin, Joel W.; Davis, George E. (2001). An Updated Classification of the Recent Crustacea. CiteSeerX 10.1.1.79.1863.[page needed]
"World Register of Marine Species, order Brachylepadomorpha". Retrieved 2021-08-24.