Chaeridiona Baly 1869
Creators: name: Staines, C. L.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Chaeridiona

description: Chaeridiona Baly   
 Chaeridiona Baly 1869: 380 (type species: Chaeridiona metallica Baly, designated by Maulik 1919). Chapuis 1875: 309 (redescription); Uhmann 1951: 24 (faunal list), 1958: 251 (catalog), 1964: 466 (catalog); Gressitt & Kimoto 1963: 911 (China species); Würmli 1975: 56 (key to genera), 1976: 402 (revision); Seeno & Wilcox 1982: 164 (catalog); Chen et al. 1986: 191 (China species); Jolivet & Hawkeswood 1995: 155 (host plants); Basu 1999: 163 (India species); Kimoto 1999: 109 (southeast Asia species).   
 Choeridiona Gemminger & Harold 1876: 3609 [misspelling] (catalog); Donckier 1899: 571 (catalog); Weise 1911a: 49, 1911b: 73 (catalog); Maulik 1919: 85 (India species); Gressitt 1950: 77 (China species).   
Small; body wedge-shaped; coarsely punctate, punctures may coalesce, punctures in regular rows on elytra; pronotum with tooth in each anterior angle; color brown to dark red, many with a metallic green or blue sheen. Head: produced between eyes; angulate in front; maxillary palpomere 1 small, 2–3 subequal in length, short, 4 as long as 1–3 combined; mentum oblong, laterally constricted; ligula inserted on dorsal side of mentum, base invisible, apex large, subquadrate, longer than mentum; labial palps absent or with 1 palpomere; clypeus more or less conically raised in middle. Antenna: robust; more than ½ length of body; antennomeres cylindrical; I thicker than others, rounded. Pronotum: subcylindrical; narrowly margined laterally. Elytron: combined, much wider than base of pronotum; dilated apically; apex obliquely truncate; sutural angle rounded, emarginate; coarsely punctate-striate; alternate interspaces carinate, carinae flattened. Leg: moderately long, relatively slender; unarmed; tarsomere 1 short, 2 wider, 3 widest and longest, 4 exceeding lobes of 3; tarsal claws long, distinct. Male genitalia aedeagus sclerotized, showing considerable curvature from below; apex tapering to acute point.  
 Chaeridiona can be distinguished from the other two genera in the tribe Oncocephalini (Prionispa Chapuis and Oncocephala Agassiz) by having the labial palps absent or with one palpomere; with antennomeres not striate and antennomere 3 longer than 1 and 2 combined; by the head being carinate between antennal bases; and by the pronotum without tubercles.   
 Chaeridiona tuberculata Chen & Yu 1964 is a homonym of Ch. tuberculata Uhmann 1961. It is congeneric with Prionispa (labial palps having 3 palpomeres and with antennomere 3 longer than 1 and 2 combined) and is transferred to that genus. This makes it a primary homonym of P. tuberculata Pic, 1926; Prionispa tuberculata Chen & Yu is renamed Prionispa cheni nomen novum (ICZN Article 60).   
 Chaeridiona clavata Yu 1992 has labial palps with 3 palpomeres and antennomere 3 longer than 1 and 2 combined. The makes the species congeneric with Prionispa and it is transferred to that genus.
description: Published as part of Staines, C. L., 2007, A review of the genus Chaeridiona Baly, 1869 (Coleoptera: Chrysomelidae: Cassidinae), pp. 19-29 in Zootaxa 1521 (1) on page 20, DOI: 10.11646/zootaxa.1521.1.3, http://zenodo.org/record/5087559