CORYLOPHIDAE

Author: John F. Lawrence.

Classification

Suborder Polyphaga, Series Cucujiformia, Superfamily Cucujoidea.

Description

Antenae with 8 to 10 segments and a 3 or 5 segments club. Antennal insertions exposed. Visible portion of procoxa transversae to globular with the trochantin concealed. Procoxal cavity externally closed and internally closed. Mesocoxae separated by 0.4 to more than 1 coxal width, with mesocoxal cavity laterally closed. Tarsal formula 4-4-4 or 4-4-4 but tarsomere 3 reduced and concealed at base of lobe on 2 (pseudotrimerous). Number of ventrites 5 or 6 without ventrites connate. Body length 0.6-2 mm. Circular to ovate, rarely elongate, highly convex to flattened, glabrous or pubescent. Antennae well-developed with large club bearing vesicles. Head small, often concealed beneath pronotum (exposed in Orthoperus and Aenigmaticinae). Elytra complete or truncate, exposing 1 or 2 tergites.

Quick identification

Corylophidae contains a number of minute beetles, which are often ovate and flattened to highly convex, with 4-4-4 tarsi and a large antennal club bearing vesicles. The most unusual are the Aenigmaticinae, (first and second figures) which are elongate and flattened, with an exposed head and Orthoperus (third figure) which also has the head exposed. All the more typical corylophids (last three figures) have the head more or less concealed beneath the prothorax.

Genera occurring in Costa Rica

Aenigmaticinae: Aenigmaticum, Conodes, Ectinocephalus.
Orthoperinae: Orthoperus.
Corylophinae: Arthrolips, Clypastraea, Corylophus, Sericoderus...
Rypobiinae: Hoplicnema.

© CSIRO Emtomology, 1999 Aenigmaticum	© CSIRO Emtomology, 1999 Conodes	© CSIRO Emtomology, 1999 Orthoperus

© CSIRO Emtomology, 1999 Corylophus	© CSIRO Emtomology, 1999 Sericoderus	© CSIRO Emtomology, 1999 Arthrolips