Eumorphus Weber, 1801

Yoshitomi, Hiroyuki & Sogoh, Koichi, 2019, Eumorphusmarginatus group in Sulawesi, Indonesia (Coleoptera, Endomychidae), ZooKeys 820, pp. 139-149 : 140-141

Eumorphus Weber, 1801

Type species.

Eumorphus sumatrae Weber, 1801 (= Erotylus quadriguttatus Illiger, 1800).

Diagnosis.

Eumorphus is most similar to Platindalmus and Gerstaeckerus , but is distinguished from these by the following combination of characters: 1) lateral margin of pronotum with a tendency to form irregularly broken lines, inconsistent and often asymmetrical; 2) apex of mandibles narrowly chisel-shaped; 3) basal margin of elytra simple; 4) intercoxal process of mesoventrite subparallel-sided; 5) male femora lacking fringes of long hairs on inner edges (after Tomaszewska 2005).

The Eumorphus marginatus group (sensu Strohecker 1968) is characterized as follows: large body size; elytra with lateral flattened margins wide, elevated dorsally in mesal part in male; male fore tibiae with sexual dimorphism.

Biological notes.

Eumorphus marginatus Fabricius, 1801 was collected from Polyporus sp., and living individuals apparently have a strong unpleasant smell, much like that of the seeds of Parkia speciosa (after Arrow 1925). The larva of Eumorphus quadriguttatus (Illiger) was described by Bugnion (1909) and Hayashi (1986), and Tomaszewska (2005) provided a description of the larva of a Eumorphus sp. with figures.

Key to the species of Eumorphus marginatus group in Sulawesi