Genus Archecalisius nov.gen.

T y p e s p e c i e s. Archecalisius longiventris nov.sp.

D i a g n o s i s: Recognized and distinguished from all Aradidae described so far from Burmese Amber by its ̎typical̎ Calisius -habitus with large scutellum covering mediotergites of abdomen and the double row of lateral tubercles on deltg I-VII.

D e s c r i p t i o n: Macropterous, size about 4mm; colour brownish under stramineous incrustation; surface of body finely granulate and punctured which is more conspicuous on head, pronotum and scutellum.

Head: Longer than wide, clypeus produced anteriorly, reaching about ½ of antennal segment III; antennae slightly longer than width of head, segments I+II of equal length, IV longest; rostrum arising from an open atrium, shorter than head.

Pronotum: About 1.7 times as wide as long, lateral margins dentate converging anteriorly, disk with four longitudinal carinae, the median ones shorter.

Scutellum: About twice as long as wide covering mtg II-VI; lateral margins carinate, apex rounded; disk basally moderately raised, median longitudinal carina present.

Hemelytra: Visible lateral margin of corium raised and granulate, reaching deltg IV and fitting to an excision of the anterolateral margin of scutellum.

Abdomen: Of elongate oval outline, lateral margins of deltg I-VII with a double row of three distinct tubercles; surface rather flat and granulate.

Venter: Sternites III-VII separated by sutures, spiracles III-VI ventral, VII lateral, II not discernible.

Legs: Unarmed, tarsi two segmented, claws with pulvilli.

D i s c u s s i o n: The general aspect is that of an extant species placed in the genus Calisius. Examination of species from different regions (Neotropics, Oriental, Palaearctics) described as Calisius proved that they belong to different genera, which were partly described by HEISS (2016). As the Oriental fauna of ̎ Calisius ̎ is not yet investigated and taxonomic changes are expected, this fossil taxon is compared with the palaearctic genus Aradosyrtis COSTA, 1864, redescribed by HEISS (2016).

Archecalisius differs from Aradosyrtis by following characters: