Neocarventus Usinger and Matsuda 1959
Creators: name: Larivière, Marie-Claude
name: Larochelle, André
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Aradidae
Neocarventus

description: Genus Neocarventus Usinger and Matsuda, 1959
Fig. 21, 29, 39–42, 64–69, 83–86
Neocarventus Usinger and Matsuda, 1959: 164.
Type species. Neocarventus angulatus Usinger and Matsuda, 1959, by original designation.
Description (incrustation removed). Apterous. Body subovate, moderately to strongly narrowed anteriorly; length about 3.1–3.4 mm (male), 3.5–3.8 mm (female). Head. Eyes rather small in relation to head, granulate. Postocular tubercles evanescent or at most forming short swellings. Rostrum arising from a closed atrium. Thorax. Pro-, meso-, and metanotum separated by moderately deep sutures. Pronotum. Double-ring collar distinctly set off from anterior margin, with lateral tubercles and posteriorly produced subtriangular plate. Disc with a moderately large, somewhat swollen, posteriorly produced, subtriangular plate split for part of its length by a narrowly subtriangular to somewhat rounded median sulcus. Lateral portions with a curved submarginal ridge close to lateral margin. Mesonotum. Disc bearing a large laterally winged plate with a V-shaped backward projection nearly reaching posterior margin of metanotum and two oblique, slightly curved, subrectangular anterolateral projections covering much of lateral portions; apex of V-shaped projection flanked by two small, rounded metanotal callosities. Metanotum. Disc largely covered by mesonotal projection. Posterolateral angles slightly to moderately elevated and produced, forming regularly curved to angular, acutely tipped spines slightly surpassing anterior margin of dmtg I (male), distinctly thickened, forming short, narrowly to broadly roundedsubtriangular lobes (female). Legs. Coxal lobes rugose. Trochanters and femora demarcated from each other. Femora granulate, about as long as tibiae. Protibiae with fine ventral spines and apical comb. Abdomen. Dmtg I–II separated from metanotum by a distinct suture; narrowly fused medially, with each side of a longitudinal carina, separated from each other laterally for most of their width; lateral portions with a thin, elongate, laterally enlarged, transverse plate along anterior margin in front of a larger, subrectangular plate that is laterally attenuate and anteriorly curved behind a submarginal pit. Tergal plate (dmtg III–VI) completely fused, without sulci or carinae around apodemal markings although pale color bands may be visible. Dmtg IV–VI with small granulate areas on each side of a distinct subrectangular plate carrying scent gland openings. The latter (or scars thereof) three in number, first moderately developed, displaced posteriorly on dmtg IV, second very small, third evanescent. Connexivum. Dorsal laterotergites (dltg) with a pair of more or less distinct, rounded, smooth apodemal spots, posterior one larger. Dltg II–III fused, subtriangular, extending forward to or slightly beyond posterolateral angles of metanotum; IV–VI subquadrate; VII subrectangular (male), subquadrate (female). Spiracles II–IV ventral (not visible from above), V–VII lateral (visible from above). Pattern of apodemal markings 2:1:1 (dorsal); 2:2:1 (ventral). Male genitalia. Pygophore trilobate (Fig. 21, posterodorsal view); dorsal lobes below carinate margin, nearly rounded in shape, strongly convex and produced backward, separated from each other by a deep furrow; ventral lobe narrowly rounded, strongly produced; dorsal opening narrow; paramere heads partially visible as lamellate setose structures; posterior rim with a long, anteriorly directed, subtriangular projection on each side of median suture. Paratergites VIII (Fig. 29, outer lateral view) with an apically digitate, narrowly hookshaped head; spiracle distant from apex.
Remarks. The genus Neocarventus is morphologically close to Tuataraptera which in turn bears a superficial resemblance to Clavaptera and Modicarventus (see Remarks under each genus). Neocarventus was previously known from two species, N. angulatus (type species) and N. uncus. Three new species of Neocarventus are described here and Neocarventus uncus is transferred to the newly erected genus Tuataraptera. The four species currently recognized in Neocarventus have an allopatric distribution on the North Island and a few nearby offshore islands.
description: Published as part of Larivière, Marie-Claude & Larochelle, André, 2022, Synopsis of the subfamily Carventinae in New Zealand (Heteroptera: Aradidae), pp. 1-54 in Insecta Mundi 2022 (961) on pages 25-26, DOI: 10.5281/zenodo.7399305