Nestorinus Guerrero & Vidal G-H & Zúñiga-Reinoso 2022, GEN. NOV.
Creators: name: Guerrero, Marcelo
name: Vidal G-H, Pedro
name: Zúñiga-Reinoso, Álvaro
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tenebrionidae
Nestorinus

description: GENUS NESTORINUS GEN. NOV.
(FIGS 3–5)
Zoobank registration: lsid: zoobank. org:act: 52AD1756-C1EC-40FD-A07F-681585547BEF
Diagnosis: Body elongated, black, shiny and slightly convex (Fig. 3A). Flightless. Head tilted down, narrower at the base, wider at eye level. Clypeus transverse, anterior margin emarginate. Suture between clypeus and frons visible. Genae developed. Eyes vertical (lateral view) and reniform. Antennae with 11 antennomeres. Antennomeres VII–XI with stellate sensoria. Pronotum transverse, slightly convex (Fig. 3B). Anterior margin sub-straight. Basal margin wide, visible and bisinuate. Elongated and striate elytra. Nine striae formed of coarse punctures (Fig. 3C). Prosternum narrow. Prosternal apophysis slightly raised. Anterior portion of mesoventrite with a central carina (Fig. 3D). Metaventrite wide, smooth and shiny (Fig. 3D). Abdominal ventrite IV narrower than I– III (1:2; Fig. 3D). Abdominal ventrite V triangular, finely punctured and with margins barely visible. Visible membrane in the last two abdominal ventrites. Defensive glands below abdominal ventrite V large, wrinkled and with basal collecting tube (Fig. 3E). Legs long and thin (Fig. 3A, D). Femora and tibiae slightly punctured. Tibiae internally with a smooth carina slightly visible, with a row of semi-erect setae both sides of the carina. Mesotibiae and metatibiae with semi-erect setae on the margins of the internal face and dense pilosity in the central cleft of the internal face (Fig. 3F). Aedeagus with parameral alae robust (Fig. 3G).
Females in general similar to males (Fig. 4A), but larger. Metatibiae with sparse semi-erect setae on the margins of the internal face; central cleft of the internal face with sparse pilosity (Fig. 4B). Ovipositor (Fig. 4C) greatly elongated, membranous except for baculi. Baculi of first coxite long. Lobes of coxites 2, 3 and 4 membranous and thinning to the apex. Spermatheca spherical, with surface grooved (Fig. 4D).
Mature larva: Body elongate-cylindrical and yellowish (Fig. 5A). Head prognathous, slightly declined; globular butslightlyflatteneddorsoventrallyandwithtransversal wrinkles close to the lateral margin. Epicranial suture Y-shaped (Fig. 5B). Each half of the head with 13–17 erect setae placed dorsal and laterally. Three stemmata with variable pigmentation placed on each side of the head and below the antennae (Fig. 5B, C). Clypeus with a long seta on each side of the disc and three shorter setae on the lateral margin. Labrum transverse, anterior margin bilobed, with two long discal setae, two anterior long setae and 16 shorter setae on the anterior margin (Fig. 5B). Antennae with globular base and composed of three antennomeres (Fig. 5B, C). Antennomere I four times as long as wide. Antennomere II ovoid, twice as long as wide. Antennomere III twice as long as wide, with a single apical seta. Mandibles asymmetrical (Fig. 5C), with three teeth on each one. Prothorax longer than wide; meso- and metathorax wider than long (Fig. 5A). Each notum with 10–12 spacing setae on both sides of the mid-line. Mesothoracic spiracle longer than the abdominal spiracle (Fig. 5A). Metathoracic spiracle not visible. Prothoracic legs slightly larger than the others; all legs with elongated trochanter (Fig. 5C). Simple claw, sharp and apically curved. Abdominal segments I–VII similar in aspect, gradually widening toward the back (Fig. 5A). Tergum with spacing setae as the thoracic segments. Annular spiracles with four to six setae in the anterior margin and two setae in the posterior margin. Tergum VIII punctured and sclerotized (Fig. 5D). Two prominent processes raised in the posterior half, with coriaceous appearance (Fig. 5D). Three thorns at side, in a diagonal direction from the middle anterior margin to the lateral margin and decreasing in size. Tergum IX short, about half the width of tergum VIII and hinged to it, allowing curved urogomphi to come forwards to oppose and contact processes of tergum VIII (Fig. 5D). Several long setae surround tergum IX, being densest on the base (Fig. 5E). Two urogomphi, each with four strongly sclerotized thorns decreasing in size toward the sides and curved dorsally, with sharp apices pointing anteriorly (Fig. 5D). The main thorn in the second position from the mid-line is twice as long as the others (Fig. 5E). In posterior view, each urogomphus has four to seven secondary thorns below the main thorns (Fig. 5E). Another two rows of shorter thorns are present lower. The first line has eight thorns and the second has 10–12 tiny thorns (Fig. 5E).
Etymology: The genus name is a masculine adjective, chosen to combine the words ‘Nestor’, after Néstor Zambrano who collected the first specimens, and ‘-rinus’ from Nycterinus, a Tenebrioninae that looks similar to this new taxon.
Type species: Nestorinus roitmani sp. nov.
description: Published as part of Guerrero, Marcelo, Vidal G-H, Pedro & Zúñiga-Reinoso, Álvaro, 2022, Integrative taxonomy reveals a new genus from Central Chile and suggests a systematic rearrangement in Stenochiinae (Coleoptera: Tenebrionidae), pp. 960-972 in Zoological Journal of the Linnean Society 194 (3) on pages 963-965, DOI: 10.1093/zoolinnean/zlab026, http://zenodo.org/record/6352051