Heleolaccocoris Sites 2022, GEN. NOV.
Creators: name: Sites, Robert W.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Naucoridae
Heleolaccocoris

description: HELEOLACCOCORIS GEN. NOV.
FIGS 4B, 5A, B, 11E, 21
Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: E84AF6F5-D470-436E-9D0C-F26EB532CCF4
Type species: Heleolaccocoris horvathi (Montandon, 1897b).
Description: Form broadly oval; widest at embolia; dorsoventrally flattened.
Head broad, less than twice as long as wide, eyes and anterior margin continuously and evenly convex to anterolateral corners of pronotum. Eyes slightly convergent anteriorly; mesal margin straight, anteroventral margin concave; narrow band of cuticle posterior to eye widening lateral to eye. Front of head rolled posteroventrally so labrum set back from functional anterior margin, giving a bull-nosed appearance. Labrum wider than long, apex rounded or pointed, without transverse basal sulcus. Maxillary plate not flap like, but integral with head capsule, immediately posterolateral to labrum. Rostrum with three visible segments, with segments 1 and part of 2 concealed behind labrum. Antennae four segmented with segment 1 short and inconspicuous, 2 and 4 longer, 3 longest; segment 2 enlarged, 2–4 setose. Head and pronotum flattened transversely.
Pronotum with anterior margin straight or slightly concave between eyes, then concavity becoming more pronounced as margin contours around eye; lateral margins strongly convergent anteriorly and with slight convexity; posterior margin straight except at posterolateral corners. Scutellum triangular, lateral margins sinuate, ~twice as wide as long, heavily punctate. Hemelytra punctate throughout, extending to tip of abdomen. Embolar suture well-defined mesally, but poorly defined or absent posteriorly in some species; clavus well defined with claval and intraclaval sutures.
Propleuron immediately lateral to coxal cavity with brush of long setae; mesal part irregularly shaped and pruinose; lateral part glabrous. Prosternum sharply carinate, carina widening anteriorly to form a Y shape. Mesosternum tumescent medially with thick brush of long hairs. Metaxyphus well developed and with median carina. Abdominal venter covered with dense pile of appressed hairs; brush of long hairs on midline of III–VII in females, III–VIII in males; glabrous band along lateral margin; laterosternites each with 2–4 oval to elongate, glabrous depressions near spiracles.
Profemur elongate for family, not noticeably inflated, anterior margin with dorsal and ventral rows of golden hairs sandwiching one or two rows of short, dark spines. Protarsus single segmented in females, two segmented in males, each with paired movable pretarsal claws. Males with thick pad of hairs on mesotibia and tarsomeres 2 and 3, and to a lesser extent on protibia and both tarsomeres; females with pads of hairs greatly reduced. Mesofemur with posteroventral row of short, spinose setae tightly spaced such that bases of adjacent setae are in contact or nearly so (Fig. 5a); posterior margin with dense brush of light-coloured setae. Metafemur with posteroventral row of short spinose setae spaced approximately one seta width apart for most of length; with anteroventral seta row noticeably arcuate or with a posteromesal direction change in basal third as it extends basally (Fig. 5b). Meso- and metatibiae with rows of long, dark-red spines. Long, golden swimming hairs sparse on mesotibia and tarsus, profuse on metatibia and tarsus.
Proctiger triangular; aedeagus with lateral margins convex or angled, widest near middle; parameres small, symmetrical, touching or nearly touching lateral margins of aedeagus. Female mediosternite VII (subgenital plate) broad basally, strongly convex transversely, lateral margins convergent posteriorly; posterior margin interspecifically variable.
Diagnosis: Beyond attributes unique to the subfamily and tribe (see diagnoses above), additional nonmolecular features to distinguish Heleolaccocoris from Heleocoris in India are not apparent other than geographic association.
Etymology: The genus name recognizes the previous generic associations of species in this clade. Thus, Heleolaccocoris is an amalgamation of Heleocoris and Laccocoris, with the prefix derived from the Greek ἕλειος, marsh dwelling.
Comments: All species of Laccocoris from Southeast Asia, the Sunda Islands and Philippines, as well as all species of Heleocoris from Southeast Asia, including Yunnan, are here transferred to Heleolaccocoris. Although I have not examined all species, because of the clear geographic association for species of Laccocoris and Heleocoris, all species from this region are here transferred for taxonomic stability. As such, the following new combinations are proposed:
Heleolaccocoris dissidens (Montandon, 1910a) comb. nov.
Heleolaccocoris floresensis (Nieser & Chen, 1992) comb. nov.
Heleolaccocoris grandis (Montandon, 1909) comb. nov.
Heleolaccocoris hoogstraali (La Rivers, 1970) comb. nov.
Heleolaccocoris horvathi (Montandon, 1897b) comb. nov.
Heleolaccocoris jaechi (Zettel, 2012) comb. nov.
Heleolaccocoris laeviceps (Montandon, 1897b) comb. nov.
Heleolaccocoris malayensis (D. Polhemus & J. Polhemus, 2013) comb. nov.
Heleolaccocoris marginatus (Montandon, 1897d) comb. nov.
Heleolaccocoris mcphersoni (Sites & Vitheepradit, 2011) comb. nov.
Heleolaccocoris montandoni (Lundblad, 1933) comb. nov.
Heleolaccocoris nebulosus (Montandon, 1909) comb. nov.
Heleolaccocoris nervicus (Montandon, 1897d) comb. nov.
Heleolaccocoris obscuratus (Montandon, 1897d) comb. nov.
Heleolaccocoris ovatus (Montandon, 1897b) comb. nov.
Heleolaccocoris staudingeri (Montandon, 1897b) comb. nov.
Heleolaccocoris strabus (Montandon, 1897b) comb. nov.
description: Published as part of Sites, Robert W., 2022, Phylogeny and revised classification of the saucer bugs (Hemiptera: Nepomorpha: Naucoridae), pp. 1245-1286 in Zoological Journal of the Linnean Society 195 on pages 1273-1275, DOI: 10.1093/zoolinnean/zlab105, http://zenodo.org/record/6994599