Aneurillodes cascadensis, Heiss, 2011

Heiss, E., 2011, First record of Aneurinae from New Caledonia (Hemiptera, Heteroptera, Aradidae), Linzer biologische Beiträge 43 (2), pp. 1331-1338 : 1332-1333

Aneurillodes cascadensis nov.sp. ( Figs 10, 11 , photo 1, 2)

M a t e r i a l e x a m i n e d: Holotype male labelled: New Caledonia, S-Prov. / Farini – Petite Cascade / 270-340m, 3km N Farino / 20 XI 2009 lg. Schuh (18) // Holotype / Aneurillodes / cascadensis nov.spec. / des. E. Heiss 2011; Paratypes: 1 1 collected with holotype are designated accordingly .

D i a g n o s i s Smaller species, closest related to A. tahitianus HEISS 1999 from Tahiti, Society Islands. It is however distinguished from the latter by smaller size, shorter pygophore of male and tergite VIII of female not wider than head ( Figs 8, 10 ; 9,11).

D e s c r i p t i o n: Macropterous, body elongate and slender with smooth and glabrous surface; colouration light brown, head darker.

H e a d: Slightly longer than wide (16/15); clypeus conical reaching about 2/3 of antennal segment I; antenniferous lobes short and rounded; antennae 1.9 as long as width of head (28.5/15); segment I thickest and as long as more slender segment II, III longer than the preceeding ones, IV elongate fusiform and longest; length of antennal segments I/II/III/IV = 5/5/6.5/11; eyes oval inserted in head; postocular lobes rounded not exceeding outer margin of eyes, posteriorly converging toward constricted collar; rostrum shorter than head, rostral atrium wide and open without lateral carinae.

P r o n o t u m:About 2.4 as wide as long (29/12); anterior margin concave, posterior margin straight; lateral margins parallel at humeri then converging anteriorly to rounded anterolateral angles which are slightly produced over anterior margin; supracoxal lobes of forelegs distinctly visible from above, also a small rim of the epimeral flap (cf. Jacobs 1986) is recognizeable; disk of fore lobe triangularly depressed along collar ending in a longitudinal median sulcus; disk of posterior lobe with two thin transverse sulci anteriorly.

S c u t e l l u m: About twice as wide as long (20/10), subtriangular with a basal and nearly straight sublateral sulci, lateral margins rounded; disk longitudinally striate.

H e m e l y t r a: Corium much shorter than scutellum; clavus small and trangular; membrane finely wrinkled.

A b d o m e n Elongate oval, lateral margins slightly but evenly rounded; deltg II+III fused, IV-VII separated by distinct sutures; additional triangular sclerite on tergite VII present. Venter with a sublateral fold along sternites II-VII delimiting the ventral hem; spiracle II and VII lateral and visible from above, III-VI ventral and placed on sublateral fold, VIII terminal on paratergites VIII.

L e g s: Femora strongly incrassate, tibiae tapering toward base; protibial comb present; claws with pseudopulvilli and setiform parempodia.

G e n i t a l i c s t r u c t u r e s: Pygophore subglobose only slightly longer than wide at base (7/6); ptg VIII clavate not reaching apex of pygophore.

F e m a l e: Basically as male but of larger size; tergite VII as wide as head.

M e a s u r e m e n t s: Holotype male. Length 2.55mm; width of abdomen across tergite IV 39 ; paratype: length 2.5mm; paratype female: length 2.75mm; head length / width 17/16; pronotum l/w 13/30.3; length of antennal segments I/ II / III / IV = 5/5/7/12.5; ratio length of antennae / width of head 1.84; width of abdomen 41.

E t y m o l o g y: Named after the type locality Petite Cascade in New Caledonia.

D i s c u s s i o n: There are only 2 species of Aneurillodes described to date sharing the small size of cascadensis nov.sp.: leptosomus HEISS 1999 from Sumatra and tahitianus HEISS 1999 from Tahiti both distinguished by structural characters as shape of pygophore or width of tergite VIII in female.

As these small flat bugs may easily be overlooked in the field it can be expected that there might occur further taxa between these two very distant localities of Oriental and South Pacific regions.

Figures

Figs 1-11: 1-5,7 Caledoneurus lariviereae nov.gen., n.sp.; (1) abdomen of male, dorsal view, (2) ditto ventral view; (3) terminal segments of female, dorsal view; (4) paramer; (5) anterior part of clavus, (6) ditto of Paraneurus sp.; (7) pygophore dorsal view; 8-9: Aneurillodes tahitianus; 10-11: Aneurillodes cascadensis nov.sp.; (8, 10) terminal segments of male, dorsal view; (9, 11) ditto of female, dorsal view. Abbreviations: lr = lateral rugose strip of tergal disk; ss = sinuate suture along deltg II; s3 = spiracle 3. Scales: 0.5mm for figs. 1-3; 0.1mm for figs. 8-11.