Estoloides sinaloana, Heffern & Santos-Silva & Botero, 2019

Heffern, Daniel, Santos-Silva, Antonio & Botero, Juan Pablo, 2019, A new genus and two new species of Apomecynini, a new species of Desmiphorini and new records in Lamiinae and Disteniidae (Coleoptera), Zootaxa 4691 (5), pp. 561-574 : 570-571

Estoloides sinaloana sp. nov.

( Figs. 29–33 )

Description. Male. Integument mostly yellow-ocher dorsally and on legs (see Ridgway 1912), slightly darker or lighter on some areas; ventral surface of thorax and abdomen mostly brown; antennomeres with distinct light ring (this area gradually smaller toward distal segments), gradually yellow-ocher toward apex.

Head. Frons finely, abundantly punctate; with yellowish-brown pubescence not obscuring integument on wide central area, more pale yellow, denser laterally and close to clypeus; with long, erect, sparse brownish setae, especially laterally, and moderately short, arched brownish setae throughout. Vertex with sculpturing as on frons (punctures sparser); with yellowish-brown pubescence obscuring integument laterally, distinctly sparser centrally, with long, erect brownish setae interspersed. Area behind upper eye lobes finely punctate (punctures slightly denser close to eyes); with yellowish-brown pubescence obscuring integument; area behind lower eye lobes finely, densely, confluently punctate; with dense yellowish-brown pubescence close to eye, glabrous toward prothorax; with a few long, erect yellowish setae on pubescent area. Genae very finely striate except smooth distal area; with pale yellow pubescence, denser toward ventral surface, except glabrous apex. Antennal tubercles finely, moderately abundantly punctate basally (punctures finer than on frons), nearly smooth toward apex; with yellowish-brown pubescence partially obscuring integument basally, gradually pale yellow toward apex (more yellowish-white on some areas of apex); with a few long, erect brownish setae interspersed. Distance between upper eye lobes 0.42 times length of scape (0.28 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 1.05 times length of scape (0.71 times distance between outer margins of eyes). Antennae 2.4 times elytral length, reaching elytral apex at apex of antennomere VI. Scape with pale yellow pubescence not obscuring integument, denser and longer on dorsal apex; with long, erect brownish setae on posterior third of ventral surface. Pedicel and light basal area of antennomeres with pale yellow pubescence partially obscuring integument, and remaining surface of antennomeres with yellowish-brown pubescence distinctly not obscuring integument (shorter than pale yellow pubescence); ventral surface of pedicel and antennomeres with long, erect brownish setae, distinctly sparser toward XI. Antennal formula (ratio) based on length of antennomere III: scape = 0.64; pedicel = 0.12; IV = 1.03; V = 0.82; VI = 0.75; VII = 0.75; VIII = 0.68; IX = 0.64; X = 0.61; XI = 0.73.

Thorax. Prothorax wider than long (including lateral tubercles); sides with long, conical tubercle about middle. Pronotum with slightly elevated, carina-shaped gibbosity centrally from anterior to posterior quarters; coarsely, moderately abundantly punctate, except smooth central gibbosity; with yellowish-brown pubescence not obscuring integument, denser laterally and central area of posterior quarter, with short, nearly erect brownish setae interspersed. Sides of prothorax coarsely, moderately abundantly punctate; with yellowish-brown pubescence not obscuring integument, denser close to pronotum, with both short and long, erect, sparse brownish setae interspersed. Prosternum very finely, abundantly, transversely striate, with a few moderately coarse punctures interspersed close to procoxal cavities; anterior sulcus well-marked; with yellowish-brown pubescence not obscuring integument, denser laterally. Narrowest area of prosternal process 0.4 times width of procoxal cavity. Ventral surface of meso- and metathorax with yellowish-brown pubescence not obscuring integument, denser laterally, sparser on central area of mesoventrite. Scutellum with dense yellowish-white pubescence except glabrous centrobasal area. Elytra. Coarsely, moderately abundantly punctate on basal half, gradually finer toward apex; apex rounded; with irregular maculae of dense pale yellow pubescence, and remaining surface with areas with distinctly sparse pale yellow pubescence, and glabrous areas; with long, erect brownish setae throughout. Legs. With yellowish-white pubescence not obscuring integument (bristly on tibiae); femora with a few long, nearly erect brownish setae on posterior quarter of dorsal surface; tibiae with moderately long, erect brownish setae dorsally.

Abdomen. Ventrites with yellowish-brown pubescence not obscuring integument; with a few long, erect brownish setae on central area of ventrites I–IV, more abundant on V; apex of ventrite V almost truncate.

Dimensions (mm). Total length, 11.05; prothoracic length, 2.15; anterior prothoracic width, 2.00; posterior prothoracic width, 2.25; maximum prothoracic width (between apices of lateral tubercles), 2.75; humeral width, 3.45; elytral length, 7.75.

Type material. Holotype male from MEXICO, Sinaloa: Loberas , 22.VII.1998, G. Nogueira col. ( CNIN).

Remarks. Estoloides sinaloana sp. nov. resembles E. jaliscana Heffern, Nascimento & Santos-Silva, 2018 , a species known only by the holotype female from Mexico (Jalisco). However it differs by the eyes ( Fig. 33 ) coarsely faceted, and upper eye lobes with seven rows of ommatidia. In E. jaliscana ( Fig. 34 ), the eyes are more finely faceted, and the upper eye lobes have nine rows of ommatidia on its widest area. This type of sexual dimorphism was not observed in the other species of the genus. Furthermore, the general color of the new species is distinctly lighter than in the holotype of E. jaliscana (dark brown throughout). However, we are not considering this last feature as a reliable difference, because the holotype of E. sinaloana may be a teneral specimen.

Etymology. Named for the state of Sinaloa in Mexico where the type was collected.

Figures

FIGURES 28–35. 28) Pteroplatus caudalis, female, dorsal habitus. 29–33) Estoloides sinaloana, holotype male: 29) Dorsal habitus; 30) Ventral habitus; 31) Lateral habitus; 32) Head, frontal view; 33) Upper eye lobes. 34) E. jaliscana, holotype female, upper eye lobes. 35) Novantinoe hovorei, female, dorsal habitus.