Xenarescus Weise 1905f: 320

Synonomys

None.

Type Species

Hispa monocera Olivier.

Diagnosis

Xenarescus can be distinguished by the following combination of characters:

• the lateral margins of the pronotumpronotum:
  occupies all of dorsal part of the prothorax; in anterior angles or posterior angles there may be a small tubercle or pore with a seta
  and the elytra without long, stiff spines
• the head with a long frontal horn which is cuspidate
• antennomere 1 with a curved, short spine-like process near apex
• prosternum prosternum:
  contains two anterior coxal cavities
  with a small carina between mesocoxae
• pronotum pronotum:
  occupies all of dorsal part of the prothorax; in anterior angles or posterior angles there may be a small tubercle or pore with a seta
  with a seta is each anterior angle

Description

Body elongate, parallel-sided.

Head: vertexvertex:
occupies the area behind and between the eyes
concave; frontal horn long, cuspidate, curved; area behind horn depressed.

Antenna: with 11-antennomeres; antennomere 1 simple in female or with a pointed ventral process.

Pronotum: quadrangular, longer than wide, weakly convex; punctured pit before middle on each side (deepens in male); seta present in anterior angle; posterior margin with transverse sulcus.

Scutellum: triangular.

Elytron: costae united, first and second separate behind middle; male with tooth‑like tubercle and carina at humerus; apex emarginate at suture, male with spoon‑like projection on exterior apical angle.

Venter: prosternumprosternum:
contains two anterior coxal cavities
forms small carina sloping back to mesocoxae.

Distribution

Brazil, Colombia, Tobago, Trinidad, and Venezuela.

World Fauna

Described species: 1- Xenarescus monoceros (Olivier) (Staines 2013).

Hosts

Musaceae, Heliconia spp. (Heliconiaceae), Stromanthe (Marantaceae).

References

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

Weise, J. 1905. Bemerkungen über Hispinen. Deutsche Entomologische Zeitschrift 1905:317‑320.