Platocthispa Uhmann 1939b: 332 Nomen nudum.
Odontota gregorii Chapuis.
Platocthispa can be distinguished by the following combination of characters:
Body flattened.
Head: with 3 parallel sulci between eyes; fronsfrons:
upper anterior portion of head capsule above the clypeus
projecting.
Antenna: with 8‑antennomeres, antennomeres transverse, apical antennomeres thickened, reaches to middle of elytra; antennomere 1 slightly compressed laterally; 2 shorter and narrower than 1; 3 longer than 4 and 5, compressed laterally, tooth‑like projection on outer apical margin; 4 to 6 compressed laterally, 4 with small tooth; 7 compressed laterally; 8 elongate, as long as 5 to 7 combined.
Pronotum: wider than long; lateral margin evenly convergent from base to apex, margined laterally; tooth present in anterior angle; basal impression present; basal margin bisinuate; longitudinal sulcus present on disc.
Scutellum: quadrate.
Elytron: lateral margin dentate; apical margin more dentate, laminate; apex notched; exterior apical angle rounded; with 8 rows of punctures, scutellar row absent; tricostate, costa 1 most elevated, 3 extends from humerus to middle of elytra.
Venter: with 5 visible abdominal sterna.
Costa Rica, El Salvador, Guatemala, México, Nicaragua, Panamá, Peru, United States.
Described species: 7 (Staines 2012). Key: none.
Cassia (Caesalpiniaceae); Costus (Costaceae); Heliconia (Heliconiaceae); Calathea (Marantaceae), Piper (Piperaceae).
Staines, C. L. 2012. Tribe Chalepini. Catalog of the hispines of the world (Coleoptera: Chrysomelidae: Cassidinae). http://entomology.si.edu/Collections_Coleoptera.html
Uhmann, E. 1939b. Amerikanische Hispinen aus dem BritischenMuseum. IX. Teil. Die Gattung Octhispa Chap., Baliosus Ws., Probaenia Ws., Acanthodes Baly, Cnestispa Mlk., und Pentispa Chap. 77. Beitrag zur Kenntnis der Hispinen (Col.: Chrys.). Festschrift zum 60. Geburtstage von Professor Embrik Strand 5:317-345.
Uhmann, E. 1940e. Die Genotypen der von mir aufgestellten Hispinen-Gattung. 88. Beitrag zur Kenntnis der Hispinen (Col. Chrys.). Entomologisk Tidskrift 61:143-144.