Nipponocalisius niger, 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 : 52-54

Nipponocalisius niger nov.sp. ( Figs 8-10 )

Holotype: ♀. MALAYSIA - Sabah / Kinabalu Nat. Park / Headqu. env. / 8-10 VII 92 E.Heiss // . Paratypes: 2♀♀ collected with holotype ( CEHI). Types are labelled accordingly.

E t y m o l o g y: Refers to its blackish colouration, not yet observed in this genus.

D i a g n o s i s Distinguished from Japanese congeners N. ishikawanus HEISS et al., 2024, N. tomokunii HEISS et al., 2024 and N. dimorphus HEISS et al., 2024 ( HEISS et al. 2024) by the black colouration, dense tuberculation of head, pronotum, abdomen, lateral margins of scutellum, exposed tergal plate and corium, the structure of triangular basal sclerite and dense tubercles of prominent longitudinal scutellar ridge.

D e s c r i p t i o n: Small species of 2.45 mm, body of blackish colouration with yellowish antennae, clypeus, legs and posterior margins of deltg II-VIII.

H e a d. Slightly wider than long; clypeus sub-rectangular, laterally depressed, lamellate genae anteriorly dilated forming a rim-like structure embracing the clypeus, surface tuberculate; antenniferous lobes short and blunt; antennae shorter than width of head, antennal segments I+II shortest, III longer, IV longer than III with spaced plaques; eyes conical, inserted; vertex and postocular lobes beset with round tubercles.

P r o n o t u m. Trapezoidal, twice as wide as long; lateral margins anteriorly with three larger tubercles then granulate, disk on anterior part with rows of larger round tubercles, irregularly granulate posteriorly.

S c u t e l l u m. Basal triangular elevation beset with larger tubercles which continue on longitudinal scutellar ridge; lateral and rounded posterior margin and exposed corium densely beset with tubercles; disk with shallow punctures.

A b d o m e n. Surface of deltg II-VII tuberculate, their lateral margins with three dorsal and subventral tubercles; tergal disk covered by scutellum, its lateral margin delimited laterally by an exposed granulate carina¸ spiracles II-VI ventral, VII lateral on deltg VII and visible from above; transverse tergite VIII posteriorly exposed, bearing spiracles VIII.

M e a s u r e m e n t s. Holotype: ♀. Length of body 2.45; head width/length 0.50/0.45 (ratio 1.11); pronotum width/length 1.00/0.50 (ratio 2.00); width of abdomen across tergite IV 1.05; length of antennae about 0.85. Paratypes: 2♀♀. Length 2.45, 2.50; other measurements as holotype.

R e m a r k s: N. niger nov.sp. is tentatively assigned to genus Nipponocalisius , sharing the rim-like dilated lamellate genae, the main distinguishing character of this genus described from Japan. Differences in body structures of N. niger and biogeographical considerations might indicate, that it represents another genus. Future molecular investigations based on new material will proof the assumption.

Figures

Figs 8-10: Nipponocalisius niger nov.sp., holotype ♀. (8) habitus dorsal; (9) sublateral; (10) lateral. Scale 1 mm. © A. Eckelt.