Cymatodera humeralis Burke & Sole & Toledo-Hernández & Scholtz 2017, sp. n.
Creators: name: Burke, Alan F.
name: Sole, Catherine L.
name: Toledo-Hernández, Víctor H.
name: Scholtz, Clarke H.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cleridae
Cymatodera
Cymatodera humeralis

description: Cymatodera humeralis Burke & Sole, sp. n.
(Figs 1, 6, 22, 27)
Type material. Holotype: Red labeled, male: Mexico, Guanajuato, Sierra de Sta. Rosa, Cañada Guadalupe, 29-31- VIII-1995, 2 250m, I. Delgado (CIUM).
Paratypes: (1) Yellow labeled: 1 male: same data as holotype (CNIN).
Differential diagnosis: Species of Cymatodera distributed in central Mexico belong to Cymatodera humeralis if they have the following combination of characters: Integument dark brown to almost piceous; a sinuous, pale, median elytral band; a pair of testaceous and irregular maculae on the humeral angles; anterior margin of elytral disc not constricted; posterior wings fully developed; and elytral punctuations arranged in regular striae, becoming small and shallow before apices. In addition, males of C. humeralis have the posterior margin of ventrites 1-4 with a longitudinal, pale carina (Fig. 27), and the pygidium broad, small and subtriangular, with the posterior margin feebly and shallowly emarginate (Fig. 6). Females of this new species are unknown.
Description: Holotype male. Form elongate, somewhat robust; metathoracic wings fully developed. TL = 8.85 mm. Color: Head, pronotum, thorax, abdomen and elytra piceous; antennae, legs and mouthparts testaceous; elytral surface with a pale testaceous, longitudinal, sinuate band that extends from the epipleural fold to the elytral suture, and a pair of pale, conspicuously marked maculae located on the humeral angles (Fig. 1).
Head: HL = 1.85 mm, HW = 1.65 mm. Measured across eyes wider than pronotum; surface smooth, shiny, finely punctate; frons not bi-impressed, clothed with short, very fine, semirecumbent setae and few scattered long, erect setae; eyes large, subsinuate, ovoid, separated by approximately 1.95 eye-widths, bulging laterally. Antennae slender, extending slightly beyond anterior margin of elytra; third antennomere about twice the size of second antennomere, antennomeres 3-10 approximately the same size, eleventh antennomere ovoid, approximately 2 × the size of tenth antennomere; antennomeres 4-10 serrate; serration gradually increase distally.
Thorax: PL = 2.45 mm, PW = 1.5 mm. Pronotum elongate, widest at middle; sides constricted laterally, more strongly constricted behind middle; disc flat, moderately impressed in front of middle; subbasal tumescence feebly pronounced; surface shiny, feebly rugose, finely punctate; vested with short, pale, recumbent setae interspersed with few, long, erect setae, the latter more numerous laterally. Prosternum wider than long; surface shiny, smooth, shallowly punctate, glabrous. Mesoventrite shiny; shallowly punctate; vested with scattered, long, semierect setae. Metaventrite strongly convex; rugulose; shallowly punctate; clothed with fine, pale, semirecumbent setae.
Legs: Femora rugulose, finely punctate; clothed with short, pale, recumbent setae interspersed with a few erect setae. Tibiae longitudinally rugulose; feebly, shallowly and narrowly punctate; vested with short, recumbent setae interspersed with some scattered, erect setae.
Elytra: EL = 6.42 mm, EW = 2.95 mm. Anterior margin arcuately emarginate, wider than widest portion of pronotum; sides feebly oblique, widest on posterior 1/3; disc convex; apex rounded, not dehiscent; elytral sculpturing arranged in regular striae; punctuation on elytral disc scarce on anterior 1/2, then abruptly disappear on posterior 1/2; punctations at elytral base moderately coarse and deep; surface rugulose, shiny, clothed with short, pale, recumbent setae intermixed with scattered, long, erect setae.
Abdomen: Ventrites 1–5 subquadrate, rugulose, conspicuously, finely punctate; clothed with short, pale, recumbent setae. Ventrites 1-4 with a feebly elevated, longitudinal, pale carina which does not attain posterolateral angles and a pair of large, pale, shallow impressions near sides (Fig. 27). Fifth ventrite feebly convex; subtriangular in shape; surface rugose, shallowly, finely punctate; lateral margins oblique, somewhat arcuate; posterior margin shallowly and broadly emarginate (Fig. 6). Sixth ventrite subtriangular in shape; reduced; broader than long; lateral margins oblique, somewhat arcuate; hind margin conspicuously reduced, shallowly, U-shaped emarginate; surface feebly convex, shiny, finely punctate (Fig. 6). Fifth tergite rugulose; lateral margins moderately oblique; posterior margin truncate. Sixth tergite reduced, subquadrate, broader than long; lateral margins oblique, feebly arcuate; posterior margin truncate, extending slightly beyond apical margin of sixth ventrite.
Aedeagus: AL = 1.25 mm. Somewhat sclerotized; ratio of length of paramere to whole tegmen 0.22: 1; tegmen does not cover phallus; parameres feebly developed, pointed at apex; phallobase rather narrow; phallus with copulatory piece acuminate distally; phallic plate without rows of denticles, finely granulate on lateral margins; phallobasic apodeme long, slender; endophallic struts robust apically, becoming slender distally (Fig. 22).
Variation: The single paratype specimen has a length of 8.1 mm. Other characters remain constant.
Females: The female is unknown.
Distribution: The type material was collected at a single locality in the Sierra de Santa Rosa, at the northern portion of the state of Guanajuato (Fig. 33). The vegetation at the collecting site is dominated by sub-temperate pine-oak forests mixed with other broad-leaved species.
Observations: The reduced and simple structure of the sixth visible abdominal segment, the serrate condition of antennomeres 4-10, and the longitudinal, pale carinae on the posterior portion of ventrites 1-4 (Fig. 27), are characters that suggest relatedness of the new species to C. limatula Burke, C. gerstmeieri Burke and Bogcia disjuncta Barr.
Etymology: The specific epithet humeralis comes from the Latin “humerus”, meaning shoulder, a reference to the dark testaceous shoulders of this new species.
description: Published as part of Burke, Alan F., Sole, Catherine L., Toledo-Hernández, Víctor H. & Scholtz, Clarke H., 2017, Five new species of Cymatodera Gray, 1832 (Coleoptera: Cleridae: Tillinae) from Mexico and Central America in Zootaxa 4350 (1), DOI: 10.11646/zootaxa.4350.1.6, http://zenodo.org/record/1050943