Agathomerus santiagoi Rodríguez-Mirón & López-Pérez, 2025, sp. nov.
Creators: name: Rodríguez-Mirón, Geovanni M.
name: López-Pérez, Sara
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Megalopodidae
Agathomerus
Agathomerus santiagoi

description: Agathomerus santiagoi sp. nov.
Fig. 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) with anterior groove interrupted medially, scutellum slightly emarginate at apex, metaepisternum (Fig. 4 G) uniformly punctate and pubescent, metatibiae ventrally concave, parameres (Fig. 4 D) 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) with a continuous groove on anterior portion, scutellum rounded at apex, metaepisternum (Fig. 3 H) with anterior region impunctate and glabrous, rest coarsely punctate and pubescent; metatibiae ventrally flat, parameres (Fig. 3 E) with rounded apex, and robust roof.
Description.
Length 11.6 mm, width 4.4 mm. Body (Fig. 4 A, B) 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); labial and maxillary palpomeres yellow; pronotum with two black maculae (Fig. 4 F); elytra yellow with black lateral stripe, elytral suture and humeri black.
Head (Fig. 4 E). 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) 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) 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) narrowing towards apex, apical region subtriangular, apex blunt. Tegmen (Fig. 4 D) 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.
description: Published as part of Rodríguez-Mirón, Geovanni M. & López-Pérez, Sara, 2025, Redescription of the Neotropical genus Agathomerus (Coleoptera, Megalopodidae, Megalopodinae) and description of three new species from Mexico, pp. 143-158 in ZooKeys 1227 on pages 143-158, DOI: 10.3897/zookeys.1227.118934