Picnoseus ernestus Campos-Soldini & Safenraiter & Roig-Juñent 2026, sp. nov.

Picnoseus ernestus Campos-Soldini, sp. nov. urn:lsid:zoobank.org:act: 8075F3BF-4CFC-46EA-BFC1-F7ED953D09A9 (Fig. 50) Type Material. Holotype ♀ Chile prov. Huasco, 1 oct. 1987, Picnoseus ernestus, leg J. E. Barriga, Colección J. E. Barriga-Tuñón, Chile 090868, LEC. Paratype 2 ♀. White printed label Chile prov. Algarrobal, 1 oct. 1987, leg. J. E. Barriga. White printed label Colección, J. E. Barriga Chile 097348, JEBTC. Paratype 1 ♀ Chile prov. Paipote, Almagro a camino, internacional 21-V-1991 col. S. Roig, IADIZA. Paratype 1 ♀ Chile prov. Huasco, P.N. Llanos de Challe, Costa, 25 oct. 2011, 27°59’S 71°08’, 40 mt, leg. J.E. Barriga-Tuñón et al. LEC. Diagnosis. Medium- sized species. Elytra reddish or dark-reddish, lustrous tegument with black marginal and sutural vittae from base to the apex; both vittae converging distally. Head surface covered with large, deep, sparse or dense punctures; pronotum surface covered with small, shallow, and very sparse punctures. Setation black, piliform or setiform. Dorsum with erect setation; ventral surfaces with recumbent setation. Antennomere I swollen, widest at midlength, distinctly constricted proximally; antennomere II cup-shaped; antennomere III slightly expanded distally, with a weak, often obscure ventral curvature; antennomeres IV–V broader posteriorly; antennomeres VI–X subtrapezoidal. Metatibia spurs are similar in length, not parallel but divergent, forming an angle of 20 degrees; outer spur broadened apically, obliquely truncate; inner spur narrowed, sticklike. Hindwing veins compositions are summarized in table 2a. Male genitalia with spiculum gastrale bearing two subrectangular arms, joined by an irregular median concavity, proximally narrow and slightly curved to the left; aedeagus distally with two robust spines (Fig. 37). Description of Holotype. Medium- sized species; length 12–14.5 mm. Coloration. Head, pronotum, antennae, mouthparts and underside black; lustrous tegument. Scutellum dark-brown or black. Elytra reddish or dark- reddish, lustrous tegument with black marginal and sutural vittae from base to the apex; both vittae converging distally. Tegument. Head surface covered with large, deep, sparse or dense punctures; integument between them micro-reticulate. Pronotum surface covered with small, shallow, and very sparse punctures; integument between them luster. Clypeus surface with punctures similar to those on frons. Labrum surface with punctures smaller than those on clypeus. Scutellum with small, uniformly distributed punctures except along the median line and distal third, which are impunctate. Elytra surface with three longitudinal slightly visible costae. Setation. Black; piliform or setiform. Dorsum with erect setation; ventral surfaces with recumbent setation. Clypeus and labrum with setae as long as those on frons. Scutellum glabrous or with very sparse setae, setae very short (1.5 shorter than the rest of the body). Protibia with ventral surface (that opposing femur) with an extensive patch of subappressed, transversely directed silky pubescence at distally two-third; male protarsus with ventral pads homogeneously distributed throughout the length; female protarsus with ventral pads confined distally, proximal surface covered with thicker and sparse setae. Elytra with pubescence being most visible on humeral callus and elytral edge. Head. Suborbicular (length: 1.6 mm; width: 1.5 mm; maximum width just above eyes); surface with marked longitudinal median groove from vertex to the upper area of fronto-clypeal suture. Temple subparallel, rounded or straight posteriorly. Frons transversally depressed before the suture. Eye flattened, with moderately broad emargination at anterior border; ventral lobe gradually tapered (wide 0.5 mm; long 1 mm). Clypeus transverse (wide 0.3 mm; long 1.1 mm). Labrum smoothly rounded lateral edge, ventral edge broad concave (wide 0.3 mm; long 1.1 mm). Maxillary palpomere IV fusiform (maximum width at middle). Labial palpomere III narrow distally (maximal width at proximal one-third). Mandible elongate, broad curved on the external side, totally or partially covered by clypeus and labrum while resting. Antennae loosely articulated (Fig. 13). Antennomere I swollen, widest at midlength, distinctly constricted proximally; antennomere II cup-shaped; antennomere III slightly expanded distally, with a weak, often obscure ventral curvature; antennomeres IV–V broader posteriorly; antennomeres VI–X subtrapezoidal. Antennomeres length: I 0.25 mm; II 0.07 mm; III 0.37 mm; IV 0.27 mm; V–X 0.32 mm; XI 0.57 mm. Pronotum. Subtrapezoidal (long 2.1 mm; wide 2 mm), with rounded or angulous borders; anterior and posterior edges slightly curved. Legs. Femora shorter than tibia: fore- femur 2.9 mm, fore- tibia 2.8 mm; meso- femur 3.4 mm, mesa- tibia 3.5 mm; meta- femur 3.8 mm, meta- tibia 3.9 mm. Metatibia spurs are similar in length, not parallel but divergent, forming an angle of 20 degrees; outer spur broadened apically, obliquely truncate; inner spur narrowed, sticklike. Tarsomere measurement: foretarsomere (I 0.6 mm, II and III 0.5 mm, IV 0.4 mm, and V 0.6 mm); mesotarsomere (I 0.9 mm, II 0.6 mm, III 0.5 mm, IV 0.36 mm, and V 0.6 mm); and metatarsomere (I 1.3 mm, II 0.9 mm, III 0.6 mm, and IV 0.7 mm). Elytra. Total length 6.5 mm; with edges progressively divergent (maximum with at distal two-third: 4 mm), suture dehiscent at distal one-third; elytra rounded distally or convergent towards distal one-third. Hindwing veins compositions are summarized in table 2a (Fig. 26). Male genitalia (Fig. 37). SpGs bearing two subrectangular arms, joined by an irregular median concavity; proximally narrow and slightly curved to the left. Pa distally with elongate apical setae; surface incompletely sclerotized, medially membranous except for a narrow, sclerotized strip that diverges distally. Ph with a deep Vshaped concavity; Pa and Ph fused by a sclerotized tegument. Ae distally with two robust hooks: one DAH and one VAH (the latter more robust). AeA short and straight. Female genitalia. Va plate subtriangular; proximally the BsVa is pointed with an external and internal protuberance; external border with a square- shaped concavity; Sty subrectangular 1.2x times longer than Va. Intraspecific variations.The specimens herein studied presents: male protarsus with ventral pads homogeneously distributed towards the distal area; female protarsus with ventral pads confined to the distal portion, proximal surface covered with thicker and sparse setae. Etymology. The species P. ernestus is dedicated to my life partner, Carlos Ernesto Camaño Schettini. Geographic Distribution. This species is known only of the type locality, in the desert Coquimbo biogeographic province of Chile (Fig. 68). Natural History. According to the specimens label, adults were collected in spring (September and October). Picnoseus ernestus was observed feeding on flowers of Carpobrotus chilensis (Aizoaceae). Available from: https:// www.inaturalist.org/observations/198360616; date of access June 2025.