Achilia adorabilis, Sabella & Cuccodoro & Kurbatov, 2019

Sabella, Giorgio, Cuccodoro, Giulio & Kurbatov, Sergey A., 2019, A revision of the Chilean Brachyglutini - Part 4. Revision of Achilia Reitter, 1890: A. puncticeps and A. approximans species groups, with description of seven new species (Coleoptera: Staphylinidae: Pselaphinae), Revue suisse de Zoologie 126 (1), pp. 127-145 : 139-141

publication ID 10.5281/zenodo.2619528


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scientific name

Achilia adorabilis

n. sp.

Achilia adorabilis n. sp.

Figs 3 View Figs 1-6 , 16 View Figs 15-18 , 27 View Figs 19-28 , 41, 43, 45 View Figs 41-46 , 51-53 View Figs 51-56 , 57 View Fig

Holotype: MHNG (# MHNG-ENTO-13841); 1 ♂; SOUTHERN CHILI: Región Los Lagos: Osorno prov.: Puyehue National Park, Aguas Calientes , station 25a; 400-500 m; 31.XII.1990 / 01.I.1991; D. Agosti & D. Burckhardt.

Paratypes (3): SOUTHERN CHILI: MHNG (# MHNG-ENTO-13842); 1 ♂; same data as holotype . – Región Aysén: Aysén prov.: MHNG (# MHNG-ENTO- 13843 & 13844); 1 ♂ and 1 ♀; 16 km NW Cisnes Medio, Río Grande ; 200 m; 30.XII.1984 - 28.I.1985; S. & J. Peck; FIT mature beech forest .

Description: Body 1.45-1.60 mm long, reddish-brown, with darker abdomen, reddish elytra, antennae and legs; palpi yellowish. Head with protruding eyes almost as long as convex temples. Pronotum slightly wider than head; median antebasal fovea smaller than lateral ones. First abdominal tergite with basal striae extending to about one-third of paratergal length, and separated at base by about one-third of tergal width.

Male: Head as in Figs 41, 43 and 45 View Figs 41-46 , with posterior half distinctly elevated at center, dorsally flattened and densely punctate, semicircular depression with finely punctate bottom on each side just above eyes; anterior part of head also elevated towards center forming two protuberances divided by carina, and separated from posterior region by very deep and narrow transverse sulcus. Antennae ( Figs 16 View Figs 15-18 , 51-53 View Figs 51-56 ) with scape distinctly longer than wide and pedicel slightly longer than wide; antennomeres III-IV wider than long: antennomere V transverse with protruding mesal margin; antennomere VI slightly wider than long, antennomere VII about two times longer than wide with concave mesal margin bearing thin subbasal seta; antennomere VIII transverse; antennomere IX only slightly wider than long, its mesal margin projecting in a long bilobed lamina bearing large apical setae; antennomere X very big and slightly longer than wide, its mesal margin distinctly protruding in the apical half; antennomere XI elongate and longer than VIII-X combined. Metaventrite raised at middle, this area depressed, punctate and densely pubescent. Legs with trochanters very elongate; mesotrochanters ( Fig. 27 View Figs 19-28 ) unarmed; profemora and mesofemora slightly thickened; distal half of metatibiae slightly sinuate. Abdominal tergites and ventrites unmodified. Aedeagus ( Fig. 3 View Figs 1-6 , dorsal longitudinal struts not shown) 0.35 mm long; medial sclerites apically rounded, and associated on each side with four pointed sclerites.

Female: Similar to male except: head unmodified with large vertexal fovea beside each eye; vertexal sulcus present; antennae, metaventrite, and legs unmodified.

Collecting data: Collected in December and January by flight intercept traps and by sifting in Valdivian rainforests.

Distribution: Achilia adorabilis n. sp. is known from Southern Chile ( Fig. 57 View Fig : yellow stars) only in Aysén and Los Lagos Regions.

Comments: Achilia adorabilis n. sp. is easily distinguished from the other members of the genus by the very peculiar morphology of the male head ( Figs 41, 43, 45 View Figs 41-46 ), features of the antennae ( Figs 16 View Figs 15-18 , 51-53 View Figs 51-56 ), and the copulatory pieces of the aedeagus ( Fig. 3 View Figs 1-6 ).


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