Paxillus camerani (Rosmini, 1902)

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 : 332

Paxillus camerani (Rosmini, 1902)

( Figs. 8–9)

Paxillosomus camerani Rosmini, 1902: 4 ; Boucher, 1986: 504.

Paxillus camerani, Luederwaldt 1931: 77 ; Blackwelder 1944: 191 (list).

Type locality. Valle Santiago ( Ecuador).

Diagnosis. Female. Length 14.5–16.0 mm. Head ( Fig. 8): labrum with anterior margin slightly concave, frontal area punctate, anterior margin very slightly notched medially; median frontal area smooth and elevated; anterior frontal ridges weakly curved and elevated, ending before reaching medial frontal tubercles; posterior frontal ridges elevated; medial frontal tubercles prominent and directed forward. Inner tubercles small and distinct; lateral frontal area uneven, with smooth bridge; central tubercle short, slightly broader at the base and slightly separated from the posterior lateral tubercles, posterior lateral tubercles small. Post frontal area declivous and opaque. Antennal club ( Fig. 9): first antennomere reduced, antennomere 8 slightly longer than antennomere 9. Pronotum: anterior and lateral margins straight; anterior marginal with groove short, at least 1/6 length of margin, anterior marginal and the lateral marginal narrowed and with single row of coarse punctures. Prosternal process with disc elevated and slightly depressed in the center. Scutellum with median line. Mesosternum smooth and shiny; scar punctate, with punctures exceeding the border of scar. Mesepisternum with large opaque area. Metasternum: disc evident by the coarse and confluent punctures in the margins. Post lateral area of metasternum with fine and sparse punctures. Elytra: humeri with tuft of moderately elongate and sparse setae. Abdomen: sternite slightly rugose and depressed at sides. Mesotibia dorsally pubescent, with 0–1 lateral median spines.

Distribution. Luederwaldt (1931: 78) cited Ecuador (Zamora and Napo) and Brazil (Amazonas and Mato Grosso). Boucher (1986) added French Guiana.

Material examined. Ecuador, Napo, Santa Cecilia, 1 female (dissected), VI. 1968, W. Bokermann leg., excollection Alvarenga (DZUP).

Remarks. Paxillus camerani is similar to P. borellii in the anterior margin of head, but it differs from the other species by the anterior margin of the head distinctly straight ( Fig. 8) and mesosternal scar punctate, with punctures exceeding the border of scar.