Paxillus manausensis Mattos & Mermudes, new species
Creators: name: Mattos, Ingrid
name: Mermudes, José Ricardo M.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Passallidae
Paxillus
Paxillus manausensis

description: Paxillus manausensis Mattos & Mermudes, new species
(Figs. 17–21)
Description. Length 15–16 mm. Head (Fig. 17): labrum with anterior margin almost straight, with fine and moderately dense setiferous punctures; anterior frontal area irregularly punctate, with coarse and shallow punctures, somewhat dense; opaque inside the punctures; median frontal area irregularly elevated, opaque; anterior frontal ridges elevated, almost straight, reaching median frontal tubercles; posterior ridges forming an obtuse angle. Inner tubercles evident and prominent, smaller than medial frontal tubercles, medial frontal tubercles developed, elevated, and acuminate. Lateral frontal area deep with irregular elevations; elevations with coarse, shallow punctures, microsculpturing inside punctures. Bridge strong and smooth. Central tubercle short, not free, somewhat less dilated at base and merged with posterior lateral tubercles; posterior lateral tubercles small and distinct at the apex. Lateral post-frontal area smooth or punctate. Antennal club (Fig. 18): first antennomere reduced, ½ shorter than second antennomere, narrower and acuminate at apex, other antennomeres subequal. Pronotum: anterior and lateral margins straight, anterior marginal groove short, usually reaching ¼ of anterior margin; rarely long, narrow and with fine punctures, weakly separated from anterior margin. Lateral marginal groove of pronotum narrow, with coarse, contiguous and dense punctures; lateral area with irregular punctation, sometimes confluent; indistinct scar; posterior margin with or without short pubescence or tuft of setae. Prosternal process, not flattened, posteriorly wide and truncate. Scutellum flattened, with wide median groove. Elytra: humeri with tuft of setae (females) or few short setae (males). Mesosternum smooth, short scar, reaching mid length of side of mesosternum, usually suboval; lateral anterior area opaque. Metasternum: disc evident, anterior lateral area with coarse punctures, confluent and microsculptured, reaching lateral median area near the disc; posterolateral area of metasternum with fine and denser punctures. Mesotibia dorsally pubescent, sometimes with one small spine. Aedeagus (Fig. 19–21) slightly longer than wide and less sclerotized (dorsal view). Phallus globular, longer than parameres and phallobase together (lateral view); phallobase and parameres fused (lateral view), lacking division between them; parameres shortened, abruptly acuminate at apex, with inner right angle (lateral view). Phallobase strongly transverse and narrowed in the middle; ventral distal margin wide and deeply notched (ventral view).
Dimensions (mm). Total length (from anterior margin of labrum to apex of elytra) 15–16; elytral length (on median line) 9; pronotal length (on median line) 3; pronotal width 4; humeral width 4.
Type material. Holotype, male from Brazil: Amazonas: Manaus, VII.1959, C. Elias leg. Mattos & Mermudes det. 2012 (DZUP, nº 187918). Paratype: female with same data as holotype (DZUP, nº 187916).
Remarks. Paxillus manausensis is easily distinguished from P. borellii, P. pentaphyllus, and P. reyesi by the inner tubercles evident and prominent, smaller than the median frontal tubercles, the latter developed, elevated and acuminate; central tubercle short and merged with the posterior lateral tubercles, these small and distinct at the apex (Fig. 17). In addition, the phallobase is strongly transverse and narrowed in the middle (Figs. 19–21); with the distal margin wide and deeply notched (ventral view), and the parameres short, abruptly acuminate at the apex (lateral view).
Etymology. The name refers to the type locality, Manaus.
description: Published as part of Mattos, Ingrid & Mermudes, José Ricardo M., 2013, Synopsis of Paxillus MacLeay, 1819 (Coleoptera: Passalidae): distributional records and descriptions of four new species from Brazil, pp. 327-342 in Zootaxa 3652 (3) on pages 335-336, DOI: 10.11646/zootaxa.3652.3.2, http://zenodo.org/record/224020