Prionesthis

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: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Coleopterida
Ordo: Coleoptera
Subordo: Polyphaga
Infraordo: Cucujiformia
Cladus: Phytophaga
Superfamilia: Chrysomeloidea

Familia: Chrysomelidae
Subfamilia: Sagrinae
Tribus: Megamerini
Genus: Prionesthis
Species: P. chapuisi – P. fraternus – P. funerarius – P. grossus – P. madagascariensis – P. obscurithorax – P. transactor
Name

Prionesthis Lacordaire, 1845: 8

Type species: Prionesthis funerarius Lacordaire, 1845, by monotypy
Synonyms

Rhagiosoma Chapuis, 1878: cxliii [syn. Sekera & Voisin (2014: 415)]
Type species: Rhagiosoma madagascariense Chapuis, 1878 [= Rhagiosoma chapuisi Sekerka, 2007], by monotypy.

References
Primary references

Lacordaire, J.T. 1845. Monographie des coléoptères subpentamères de la famille des phytophages. Tome premier. Mémoires de la Société Royale des Sciences de Liège 3: liii + 740 pp. BHL. Reference page.
Sekerka, L. & Voisin, J.-F. 2014. Types of Sagrinae in the collection of the Muséum national d’Histoire naturelle, Paris (Coleoptera: Chrysomelidae). Annales de la Société entomologique de France (N.S.) 49(4): 413–429. DOI: 10.1080/00379271.2014.893681 Paywall Reference page.

Additional references

Sekerka, L. 2007. On the genus Rhagiosoma and the identity of R. madagascariense (Coleoptera. Chrysomelidae: Sagrinae: Megamerini). Acta Entomologica Musei Nationalis Pragae 47: 195–202. PDF Reference page.