Aradosyrtis dyak, 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 : 60

Aradosyrtis dyak nov.sp. ( Figs 23-26 )

Holotype: ♁. BRUNEI - Temburong / Kuala / Belalong Field / Study Centre , 600m // Dipterocarp forest / 2-8 V 1995 E.Heiss // . Paratypes: 2♀♀ collected with holotype ( CEHI). Types are labelled accordingly.

E t y m o l o g y:Refersto " Dyak ", the indigenous native people of Borneo Island.

D i a g n o s i s Distinguished from congeners by the colour pattern of scutellum and the wrinkled surface structure of pronotum, scutellum and abdomen.

D e s c r i p t i o n. Medium sized species; colouration ochraceous with distinct pattern of four brown dots on scutellum.

H e a d. Longer than wide, clypeus bulbous and raised dorsally; antennae shorter than width of head, segments I-III shorter and of subequal length, IV longer; vertex and postocular lobes beset with larger tubercles.

P r o n o t u m. About twice as wide as long, lateral margins sinuate; anterior lobe beset with larger round tubercles, separated from posterior lobe by a transverse furrow; posterior lobe with four distinct tuberculate carinae.

S c u t e l l u m. Basal part with six larger tubercles; lateral margins, exposed corium and median ridge densely granulate; disk with wrinkled surface structure and a specific colour pattern.

A b d o m e n. Egg-shaped, deltg II-VII flat, each with three lateral tubercles.

F e m a l e. Basic structures as male, but abdomen is wider and more rounded.

M e a s u r e m e n t s. Holotype: ♁. Length of body 2.35; head width/length 0.50/0.45 (ratio 1.11); pronotum width/length 0.80/0.45 (ratio 1.77); width of abdomen across tergite IV 0.95; length of antennae/width of head 0.96. Paratypes: 2♀♀. Length of body 2.65, 2.80; head width/length 0.55/0.47 (ratio 1.17), 0.60/0.0.47; pronotum width/length 1.35/0.45 (ratio 3.00), 1.35/0.50 (ratio 2.70); width of abdomen across tergite IV 1.10, 1.20; length of antennae/width of head 1.00/1.00 (ratio 1.00).

Figures

Figs 23-26: Aradosyrtis dyak nov.sp. (23) holotype ♁, habitus dorsal; (24) paratype ♀, habitus dorsal; (25) holotype subdorsal; (26) paratype sublateral. Scale 1 mm. © A. Eckelt.