Pselaphomorphus thayerae Vásquez-Vélez n. sp.

(Fig. 31)

Diagnosis. Pselaphomorphus thayerae is characterized by the combination of medium body size (between 2.0 and 3.0 mm), basal region of the pronotal lobes rounded, phallobase irregular with the accessory lobe less than a third of the median lobe length (Fig. 31 B).

Description. Male. Body length 2.6 mm. Body flattened dorsally, reddish with yellow pilosity. Head pearshaped (length 0.65 mm, width 0.45 mm), base of antennal tubercle as long as diameter of eye. Longitudinal sulcus wider between eyes, spindle-shaped. Eyes kidney-shaped (diameter 0.15 mm). Antennal length 1.9 mm. Antennomere length as follows: 1 (0.12 mm), 2 (0.08 mm), 3 (0.1 mm), 4 (0.12 mm), 5 (0.14 mm), 6 (0.12 mm), 7 (0.18 mm), 8 (0.14 mm), 9 and 10 (0.16 mm), and 11 (0.32 mm), clava absent. Maxillary palpi yellowish with short, clear and even pilosity. Pronotum transverse (length 0.45 mm, width 0.5 mm). Lateral lobes trapezoidal, basally and apically rounded. Antebasal lobe rectangular. Pronotal disc rectangular. Elytra length 0.7 mm, width 0.9 mm. Humeral teeth and elevation present. Sutural fovea transversely elongate, sutural stria elliptical. Basal discal fovea transversely elongate, discal depression present. Abdominal segments I–V dorsally with length as follows: 0.5, 0.1, 0.1, 0.1, 0.1 (mm). Genitalia. Phallobase irregular, globose, asymmetrical. Median lobe positioned toward left in dorsal view. Two accessory lobes at right side of medial lobe, small, less than one third of median lobe (Figs. 31 B, 31C).

Type material. Holotype (male): “ Brazil, S. Paulo, Minas Gerais, VII-74. M. Raz” (MHNG). Etymology. Patronymic. Named after Staphylinidae specialist Dr. Margaret Thayer (Field Museum, Chicago) whose strong support is gratefully acknowledged.