Paxillus uaupesensis Mattos & Mermudes

Mattos, Ingrid & Mermudes, José Ricardo M., 2013, Synopsis of Paxillus MacLeay, 1819 (Coleoptera: Passalidae): distributional records and descriptions of four new species from Brazil, Zootaxa 3652 (3), pp. 327-342 : 339-340

Paxillus uaupesensis Mattos & Mermudes , new species

( Figs. 28–32 )

Description. Length 14 mm. Head ( Fig. 28 ): labrum with anterior margin slightly concave, with pubescent punctures; anterior frontal area densely punctate, punctures coarse, opaque inside; anterior margin straight; posterior frontal area lacking elevation and smooth; posterior and anterior frontal ridges elevated and sinuate, extending from central tubercle to medial frontal tubercles; inner tubercles diminutive; central tubercle not free, wider at base and continuous with posterior lateral tubercles; posterior lateral tubercles small and evident; frontal fossae usually punctate; bridge robust and smooth; supraocular margins tuberculate with fine punctures; postocular sulcus finely punctate. Antennae ( Fig. 29 ): first antennomere of club reduced, acute at apex; scape impressed ventrally. Mentum with lateral lobes irregularly rounded and somewhat pubescent; scars opaque, clearly marked on inner portion, open to outside. Pronotum: anterior margin slightly sinuate; anterior marginal groove narrow, punctate, not reaching middle of anterior margin, usually touching it. Lateral marginal groove narrow and punctate, with fine pubescence; reaching middle of posterior margin. Sides of pronotum irregularly punctate; lacking scars. Prosternal process flat and smooth. Scutellum narrowly grooved. Elytra: dorsal striae with small punctures; lateral striae with coarse punctures. Mesosternum with scars ample and impressed, corrugated inside the elevated margins. Metasternum with lateral fossae narrow. Metepisternum narrow, finely punctate, and pubescent. Mesotibia dorsally pubescent, with 1 lateral median spine. Abdomen: sternites with subtriangular and micropunctate depression. Aedeagus ( Figs. 30–32 ) as long as wide. Phallus globular. Parameres elongate, as long as phallobase, narrow and curved to apex, apex rounded. Phallobase narrow and transverse at the middle (dorsal view), and merged laterally with parameres (lateral view); ventral distal margin deeply notched (“V”-shaped in ventral view).

Dimensions (mm). Total length (anterior margin of labrum to elytral apex) 14; elytral length (median line) 9; pronotal length (median line) 4; pronotal width 5; humeral width 4.5.

Type material. Holotype male from BRAZIL, Uaupes (Amazonas), 7–12.VII.1956, Alvarenga leg., Mattos & Mermudes det. 2012 (DZUP, nº 187913).

Remarks. Paxillus uaupesensis differs from the other species of the genus by the scars of the mesosternum well defined and impressed, corrugated inside; the prosternal process flat and smooth; and the scutellum impressed. The aedeagus is as described above ( Figs. 30–32 ).

Etymology. The specific name is a tribute to the indigenous tribe Uaupés, who live along the Uaupés River, state of Amazonas.

Figures

FIGURES 28 – 32. Paxillus uaupensis, holotype male. 28, head and anterior margin of pronotum, dorsal. 29, antennae, dorsal; 30 – 32 Aedeagus: 30, dorsal; 31, lateral; 32, ventral. Scale = 0.5 mm (Figs 30 – 32 to the same scale).