Calibruneius, Heiss & Eckelt, 2025

Heiss, Ernst & Eckelt, Andreas, 2025, Review of the subfamily Calisiinae from Borneo, with description of two new genera and seven new species (Hemiptera: Heteroptera: Aradidae), Linzer biologische Beiträge 57 (1), pp. 47-63 : 48-50

Genus Calibruneius gen.nov.

T y p e s p e c i e s Calibruneius micros nov.sp.

E t y m o l o g y: Named after of Cali-(sius) and Brunei, where it was discovered.

D i a g n o s i s: Differing from all Calisiinae genera described to date and recognized by the smallest size observed within Calisiinae and the unique wafer-like dorsal structure of its scutellum.

D e s c r i p t i o n: Very small size of about 1.6 mm, body slender subparallel; colouration yellowish brown, ochraceous are tubercles and grid-like carinae of scutellar disk. Due to its small size, the enlarged images show more detail structures than can be described.

H e a d. Wider than long, clypeus anteriorly rounded, densely beset with round tubercles; antenniferous lobes small, triangular; antennae short, segments I-III moniliform, IV longer and wider beset with distinct plaques; eyes large, inserted in head; vertex and postocular lobes beset with round tubercles; rostrum short, not reaching base of head.

P r o n o t u m. About twice as wide as long, lateral margins sinuate, anteriorly beset with tubercles, anterolateral angles marked by a larger one; collar with two tubercles, followed by clusters of tubercles on anterior and posterior lobes of pronotal disk which are separated by a distinct transverse furrow.

S c u t e l l u m. Basal subtriangular structure with six large tubercles overlapping pronotum, surface irregularly granulate; disk with a wafer like surface consisting of a median and two lateral longitudinal carinae interconnected by transverse carinae forming deep polygonal darker coloured pits; median carina beset with 7 spaced black tubercles; lateral margin of disk beset with tubercles along exposed tuberculate corium, then granulate.

A b d o m e n. Deltg II-VII narrow with a dorsal and the corresponding vltg II-VII each with a row of three oval tubercles, the anterior two of darker colour as the surface of deltg; tergal plate completely covered by scutellum; spiracles II-VI ventral, VII lateral on deltg VII and visible from above; ptg VIII with spiracles VIII; the small globular pygophore obscured by the long scutellum and hardly traceable from above.