Eocorythoderus incredibilis, Maruyama, Munetoshi, 2012

Maruyama, Munetoshi, 2012, A new genus and species of flightless, microphthalmic Corythoderini (Coleoptera: Scarabaeidae: Aphodiinae) from Cambodia, associated with Macrotermes termites, Zootaxa 3555, pp. 83-88 : 84-87

Eocorythoderus incredibilis new species

( Figs. 1–7 )

Type series. Holotype, female, 1.0 km southwest of Angkor Wat, Angkor, Siem Reap, Cambodia, 5 VI 2012, M. Maruyama leg. ( KUM). Paratypes: 1 female, same data as holotype ( KUM); 6 females, 1.0 km south of Angkor Wat, Angkor, Siem Reap, Cambodia, 18 VIII 2012, M. Maruyama leg. ( CMN, KUM, NHM); 1 female, same data but 22 VIII 2012 ( KUM); 1 female, north of Preah Khan, Angkor, Siem Reap, Cambodia, 18 VIII 2012, M. Maruyama leg. ( KUM). In fungus gardens of Macrotermes gilvus .

Distribution. Northwestern Cambodia.

Etymology. The specific epithet means incredible, due to its extraordinary appearance and unexpected discovery in Cambodia.

Diagnosis. This species is readily distinguished from other Corythoderini by the genus diagnosis above, especially by the panduriform body shape and the stout, long mesolegs. Other corythoderine genera have more or less cyrindrical bodies and slender, short (shorter than metalegs) mesolegs.

Description. Head ( Figs. 1–3 ) slightly narrower than pronotum; clypeus densely punctured along anterior margin; surface with sparse, long setae. Pronotum ( Figs. 1–3 ) slightly shorter than elytra, with surface almost impunctate, sparsely with long setae. Elytra ( Figs. 1–3 ) almost glabrous except for trichomes at apex of median projection. Proleg ( Fig. 4 ) with tibia densely setiferous near apex with small recumbent setae. Mesoleg ( Fig. 4 ) with trochanter with 3 or 4 setae; femur with about 10 setae on anterior margin, 8–10 setae around posterior margin; tibia moderately setiferous along lateral margins with long setae. Metaleg ( Fig. 4 ) with setae of similar densities to mesoleg.

Measurements. In mm: Body length, 2.81–2.96; head width, 1.01–1.04; pronotal length, 1.03–1.08; pronotal width, 1.20–1.25; elytral width, 1.35–1.38; mesotibial length, 0.86–0.88.

Figures

FIGURES 1 – 4. Eocorythoderus incredibilis new genus and new species. 1, Holotype, dorsal view. 2, Paratype, lateral view. 3, Paratype, anterior view. 4, Paratype, ventral view.

FIGURES 5 – 7. Eocorythoderus incredibilis new genus and new species. 5, Adult beetle being carried by a worker termite. 6, 7, Adult beetle (holotype) walking on a fungus garden.