Achilia antennalis Jeannel 1962
Creators: name: Giorgio Sabella
name: Sergey A. Kurbatov
name: Giulio Cuccodoro
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Achilia
Achilia antennalis

description: Achilia antennalis Jeannel, 1962
Figs 12, 19-20, 28, 30, 35
Achilia antennalis Jeannel, 1962: 405, 406
Type material (1 ex.): CENTRAL ARGENTINA: Neuquén prov.: MNHN; 1 ♂ (holotype of Achilia antennalis); Saint Martin de los Andes, Lanin reserve; about 40° S; 1000 m; III.1959; specimens wandering on the sandy shores of Lacar Lake; C. Delamare.
Additional material (124 ex.): See Appendix 1.
Description: Body 1.30-1.45 mm long, reddish with darker head and abdomen, with yellowish maxillary palpi. Pubescence decumbent with dense and long setae, sparser on head and pronotum. Head wider than long; surface smooth, shiny, with some minute punctures; vertexal foveae shallow and large; eyes protruding, longer than convex temples. Pronotum wider than long and wider than head, with maximal width on anterior half; posterior portion of lateral outlines sinuate; disc convex, smooth and shiny; median antebasal fovea smaller than lateral foveae; basal margin bordered with row of contiguous shallow impressions. Elytra together wider than long with very protruding humeri; disc smooth, shiny, with some minute punctures; four basal elytral foveae (two lateral foveae very close); sutural stria entire; discal stria extending to about elytral midlength. Legs slender. Abdomen smooth, with some minute punctures; tergite I with basal striae subparallel and very short, extending to less than 1/6 paratergal length, separated at base by more than one-third of tergal width, with short and sparse setal brush between striae.
Male: Head as in Figs 28 and 30. Antennae (Fig. 12) with scape longer than wide; pedicel slightly longer than wide; antennomere III small and transverse; antennomere IV wider than long with medial margin enlarged, anterior margin thicker than posterior, dorsal surface slightly concave and covered with numerous very little bristles, antennomeres V-X wider than long: antennomere XI distinctly longer than wide, longer than VIII-X combined. Metasternum bearing large median sulcus with pubescent sides; mesotibiae forming stout subapical spur. Abdominal tergites and ventrites unmodified.
Aedeagus (Figs 19-20) 0.28-0.29 mm long; dorsal plate large with sides sinuate; dorsal strips long and divergent; copulatory pieces consisting of pair of large sclerites that are apically enlarged and trifid, laterally ending in four tips. Parameres with middle seta on distinct lobe, that seta very stout; tips broad recurved posteriorly.
Female: Similar to male except: head with occiput only slightly swollen, frontal region flattened with slightly convergent sides and impressed vertexal sulcus; antennae unmodified, with antennomeres III as long as wide and IV-V slightly longer than wide; metasternum convex; mesotibiae unmodified.
Collecting data: Collected from December and March in Nothofagus forest that is sometimes with Chusquea, in Saxegothea forest with Drimys, and in Araucaria araucana forest at elevations ranging from 300 m up to about 1500 m. Most specimens came from sifted samples of leaf and log litter, but also were taken by flight intercept (window) and malaise traps. Jeannel (1962: 407) reports that specimens were collected wandering on the sandy shores of Lacar Lake (Argentina, Neuquén province).
Distribution: Achilia antennalis is distributed for Central Western Argentina (Neuquén province) and Central Chile from Osorno to the Maule region (Talca province) (Fig. 35).
Comments: In the original description Jeannel (1962) mentioned five males (holotype and paratypes) collected in Saint Martin de los Andes. He also stated that A. antennalis and A. lobifera have the same external and aedeagal morphology, and differ only by the shape of the male head and antennae, however, the aedeagi are really distinctive, notably in examination of the copulatory pieces (Figs 18-19).
description: Published as part of Giorgio Sabella, Sergey A. Kurbatov & Giulio Cuccodoro, 2017, A revision of the Chilean Brachyglutini - Part 2. Revision of Achilia Reitter, 1890: A. crassicornis, A. tumidifrons, A. bifossifrons, and A. lobifera species groups (Coleoptera: Staphylinidae: Pselaphinae), pp. 119-140 in Revue suisse de Zoologie 124 (1) on page 133, DOI: 10.5281/zenodo.322671