Hispines of the World

 

Imatidium Fabricius 1801a:345

 

Synonomys

 

Himatidium Fabricius.

Himatidiella Aslam 1965: 690.

Type Species

 

Imatidium thoracicum Fabricius.

Diagnosis

 

Imatidium can be distinguished by the following combination of characters:

  • the lateral margins of the pronotum and the elytra without long, stiff spines
  • body broadly oval
  • the head without a frontal horn; mouthparts not projecting forward; interantennal carina indistinct
  • the pronotum with a seta in each anterior angle
  • the apex of the elytra without a tooth-like projection
  • the elytra without costae, rounded, posterior margin smooth
  • the antennae with 11-antennomeres, filiform, antennomeres 1 to 2 elongate and subequal in length

Description

 

Head: posterior half of frons flattened; eye not projecting; interocular width less than width of an eye; distance between antenna not less than 2x distance between antenna and an eye; interantennal carina not raised, transverse carina behind labrum absent; labrum distinct.

Antenna: with 11-antennomeres, not thickened apically; antennomere 1 equal in length to 2; 2 more than 1/2 length of 3; 4 to 10 decreasing in length; 11 not laterally compressed and shorter than 10; 4 to 11 setose.

Pronotum: without notch external to anterior setae; sparsely punctate; no depressions present; lateral margin convergent from base to apex.

Scutellum: broadly triangular.

Elytron: lateral and apical margins laminate; slightly indented behind humerus; with 10 rows of moderately impressed punctures plus scutellar row.

Venter: hypomera with transverse impression beside anterior coxal cavity; 4 visible abdominal sterna.

Leg: tibia not pointed externally though excavated subapically.

Distribution

 

Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guyana, México, Panamá, Peru, Suriname.

World Fauna

 

Described species: 14 (Staines 2012). Key to species: Spaeth (1938); Aslam (1965).

Hosts

 

Inga (Fabaceae); Calathea (Marantaceae); Heliconia (Heliconiaceae).

References

 

Aslam, N. A. 1965. OnHispoleptis Baly (Coleoptera, Hispidae) and Imatidium F. (Coleoptera, Cassididae). The Annals and Magazine of Natural History (13)8:687-693.

Fabricius, J. C. 1801. Systema eleutheratorum seundum ordines, genera, species, adiectis synonymis, locis, observationibus; descriptionibus. Tomus I. Kiliae. Bibliopoli Academici Novi. 506 pp.

Spaeth, F. 1938. Die Gattung Himatidium Fabr. (Col. Cassidinae). Revista de Entomología Rio de Janiero 9:305-317.

Staines, C. L. 2012. Tribe Imatidiini. 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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