Agathomerus santiagoi, Rodríguez-Mirón & López-Pérez, 2025

Agathomerus santiagoi sp. nov.

Fig. 4 View Figure 4

Type material examined.

Holotype. Mexico • 1 ♂; Morelos, 2.5 km, 4 km O Huautla, Estacion CEAMISH ; 18 ° 27 ' 671 " N, 99 ° 02 ' 475 " W; Alt. 940 m, 7–12 July 1996; A. Pérez leg.; ex vegetación; pinned, with genitalia in a separate microvial; CNIN.

Diagnosis.

Agathomerus santiagoi sp. nov. is similar to magdalenae sp. nov. and it is distinguished by the following combination of character states: ocular canthi surface concave, scapes as long as antennomeres III, II half as long as III, pronotum (Fig. 4 F View Figure 4 ) with anterior groove interrupted medially, scutellum slightly emarginate at apex, metaepisternum (Fig. 4 G View Figure 4 ) uniformly punctate and pubescent, metatibiae ventrally concave, parameres (Fig. 4 D View Figure 4 ) emarginated at apex, and slender roof. In A. magdalenae sp. nov. the ocular canthi surface is convex, scapes are longer than antennomeres III, II twice as long as III, pronotum (Fig. 3 G View Figure 3 ) with a continuous groove on anterior portion, scutellum rounded at apex, metaepisternum (Fig. 3 H View Figure 3 ) with anterior region impunctate and glabrous, rest coarsely punctate and pubescent; metatibiae ventrally flat, parameres (Fig. 3 E View Figure 3 ) with rounded apex, and robust roof.

Description.

Length 11.6 mm, width 4.4 mm. Body (Fig. 4 A, B View Figure 4 ) with pubescence yellow; head, thorax and abdomen orange; mandibles, antennae, protibiae and tarsi black; interocular region and clypeus with a black macula (Fig. 4 E View Figure 4 ); labial and maxillary palpomeres yellow; pronotum with two black maculae (Fig. 4 F View Figure 4 ); elytra yellow with black lateral stripe, elytral suture and humeri black.

Head (Fig. 4 E View Figure 4 ). Occiput coarsely and sparsely punctate, interocular region sparsely punctate except setigerously punctate on midline, setae long; ocular canthi surface concave; antennal awning short, not prolonged onto canthi; antennae barely surpassing posterior edge of pronotum; scapes as long as antennomeres III, II half as long as III, III twice as long as V, IV as long as V, V as long as wide, VI – X wider than long; frontoclypeal groove arcuate; last labial palpomeres bullet-shaped, apex blunt; last maxillary palpomeres subconical, apex blunt.

Thorax. Pronotum (Fig. 4 F View Figure 4 ) bell-shaped, pronotal disc convex, coarsely and sparsely punctate (punctures less coarse and sparser than on occiput), with anterior groove interrupted medially; anterior angles and lateral margins rounded and pubescent, posterior region with lateral depressions, posterior margin edged with a ridge, posterior lateral angles slightly projected; scutellum depressed with respect to elytral surface, subtriangular, apex weakly emarginate, coarsely punctate; elytra with external margins subparallel, epipleura with lateral edge rounded; humeri rounded, projecting anterolaterally; disc convex, coarsely and sparsely punctate. Metaepisternum (Fig. 4 G View Figure 4 ) coarsely punctate and pubescent; metaventrite convex, coarsely punctate and pubescent; pro- and mesofemur elongate, metafemur robust and fusiform; tibiae with pubescence erect, dorsal surface with ocellate punctures and a longitudinal carinae, meso- and metatibiae curved, metatibiae ventrally glabrous with two crenate, longitudinal carinae.

Abdomen. Tergites evenly sclerotized; pygidium sparsely, setigerously punctate, apex rounded; last abdominal ventrite concave, sparsely, setigerously punctate, setae decumbent, apex truncate. Aedeagus: median lobe (Fig. 4 C View Figure 4 ) narrowing towards apex, apical region subtriangular, apex blunt. Tegmen (Fig. 4 D View Figure 4 ) sclerotized; parameres dorsally setose; setae long; apex emarginate; tegmen ring ovoid; roof half as long as parameres.

Distribution.

Mexico: Morelos.

Etymology.

The new species is named after Santiago Zaragoza Caballero, the PhD advisor of the authors.