Hispines of the World

 

Microrhopala Chevrolat 1836: 389

 

Synonomys

 

None.

Type Species

 

Hispa vittata Fabricius.

Diagnosis

 

Microrhopala can be distinguished by the following combination of characters:

  • the lateral margins of the pronotum and the elytra without long, stiff spines
  • the head without a frontal horn
  • the pronotum with a seta in each anterior angle
  • the apex of the elytra without a tooth-like projection
  • the elytra with 8 rows of punctures for entire length plus short scutellar row, with 3 weak costae
  • the antennae thickened at apex, not clavate, with 8-antennomeres
  • the prosternum does not expand anteriorly to partly cover the mouth

Description

 

Head: subglobular; vertex impressed, impression bordered on each side by longitudinal row of punctures; medial sulcus present; frons not projecting; area surrounding eye punctate.

Antenna: reaching beyond base of pronotum; with 8-antennomeres; antennomeres 7 and 8 wider and more pubescent than preceding.

Pronotum: longer than wide, widest posteriorly, often narrowed anteriorly, narrower than elytra at humeri; convex; anterior margin straight, lateral margin straight, arcuate, sinuate or bisinuate, posterior margin bisinuate; punctation usually dense; a slender, usually slightly elevated strip lacking coarse punctures present in front of scutellum.

Elytron: longer than wide; usually slightly narrowed behind humerus; with 8 rows of punctures plus a scutellar row; rows 1 and 2 extending to apex, 8 and 9 separate or sometimes confused apically, extending to near suture where they unite with 1 and 2; intervals 1 and 9 and also 3 and 7 uniting apically; interval 9 strongly elevated.

Venter: prosternum margined anteriorly by row of short setae; abdomen sparsely punctate and pubescent, apical sternite more coarsely punctate and often more pubescent than preceding sterna.

Distribution

 

Belize, Canada, Colombia, Costa Rica, El Salvador, Guatemala, México, Nicaragua, United States.

World Fauna

 

Described species: 17 (Staines 2012). Key: McCauley 1938; Clark 1983; Staines 2006b.

Hosts

 

Ambrosia, Aster, Balsamorhiza, Boltonia, Doellingeria, Encelia, Euthamia, Haplopappus, Helianthus, Heterotheca, Isocoma, Pityopsis, Seriocarpus, Silphium, Solidago, Symphtotrichum (Asteraceae); Salvia (Lamiaceae); Marsypianthes (Labiatae).

References

 

Chevrolat, L. A. A. 1836. in P. F. M. A. Dejean, Catalogue des Coléoptères de la collection de M. le comte Dejean. Troisième edition, revue, corrigée et augmentée, livr. 5, pp. 385‑503. Mequignon-Marvis. Paris.

Clark, S. M. 1983. A revision of the genus Microrhopala (Coleoptera: Chrysomelidae) in America north of Mexico. Great Basin Naturalist 43:597‑618.

McCauley, R. H. 1938. A revision of the genus Microrhopala in America north of Mexico. Bulletin of the Brooklyn Entomological Society 33:145-168.

Staines, C. L. 2006b. The hispine beetles (Coleoptera: Chrysomelidae: Cassidinae) of America north of Mexico. VirginiaMuseum of Natural History Special Publication Number 13. 178 pp.

Staines, C. L. 2012. Tribe Chalepini. Catalog of the hispines of the world (Coleoptera: Chrysomelidae: Cassidinae). http://entomology.si.edu/Collections_Coleoptera.html

 

Key player updated January 2018; content updated April 2014
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