Montane forest on SE flank of Mount Victoria at 3150 m. Det. Alexander Riedel, State Museum of Natural History Karlsruhe. This is one of the beetles exhibiting epizoic symbiosis with algae; their rough elytral sculpture promotes growth of algae, thus increasing beetle's cryptic appearance.

Arachnobas is a genus of weevils peculiar to the Moluccas and New Guinea.
When caught by an animal (e.g. me), immediately this beetle turned to lay on the back and moved its legs like a spider; probably mimicry.

Genus: Arachnobas BOISDUVAL, 1835 (Syn.: Rhynchodes)
Tribus: Arachnopodini LACORDAIRE, 1866
Subfamily: Conoderinae SCHOENHERR, 1833
[det. Alexander Riedel, 2010, based on photos]

Family: Curculionidae LATREILLE, 1802 (weevils, Rüsselkäfer)
Superfamily: Curculionoidea LATREILLE, 1802
Infraorder: Cucujiformia
Suborder: Polyphaga
Order: Coleoptera (beetles, Käfer)

Indonesia, W-Papua, SW Manokwari, Arfak Mts.: Syoubrig (Mokhwam), ca. 1600m asl., 14.08.2010; IMG_4079