Philothalpus lucieae Asenjo & Ribeiro

Asenjo, Angelico & Ribeiro-Costa, Cibele S., 2009, Two new species of the Neotropical genus Philothalpus Kraatz from Peru (Coleoptera, Staphylinidae, Xanthopygina), Zootaxa 2286, pp. 49-57 : 53-54

Philothalpus lucieae Asenjo & Ribeiro -Costa, new species

( Figs. 12–20 )

Type material. Holotype: PERU: 3, with labels: “ PERU: JU [Junin], La Merced, / Fundo Génova– UNALM [Universidad Nacional Agraria La Molina], / 11°06’28.9”S 75°21’10.8”W / 1150 m, 24.v.2006, pitfall trap / primary forest, L. Souque”, “ HOLOTYPUS / Philothalpus / lucieae Asenjo & Ribeiro-Costa / Desig. Asenjo & Ribeiro-Costa, 2009” ( MUSM). Paratypes (5): PERU: 23, with labels: “ PERU: JU [Junin], La Merced, / Fundo Génova-UNALM [Universidad Nacional Agraria La Molina], / 11°06’28.9”S 75°21’10.8”W, / 1150 m, 9.v.2006, pitfall trap / primary forest, L. Souque” (1 DZUP, 1 MUSM); 3, 2ƤƤ, with labels: “ PERU: JU [Junin], La Merced, / Fundo Génova-UNALM [Universidad Nacional Agraria La Molina], / 11°06’28.9”S 75°21’10.8”W / 1150 m, 9.v.2006, pitfall trap / coffee crops (abandoned), / L. Souque” ( MUSM); all paratypes with label “ PARATYPUS / Philothalpus / lucieae Asenjo & Ribeiro-Costa / Desig. Asenjo & Ribeiro-Costa, 2009”.

Diagnosis. Philothalpus lucieae sp. n. can be distinguished from other Philothalpus species by the head and pronotum having grooved microsculpture between umbilicate punctures ( Figs. 13–14 ) and the distinctive shape of the aedagus ( Figs. 20–21 ).

Description. Holotype male, BL: 11.75.

Body dark brown ( Fig. 12 ). Head ( Fig. 13 ) and pronotum ( Fig. 14 ) dark reddish brown; antennal segments 1–3 lighter; legs ( Fig. 12 ) dark reddish brown; scutellum black, elytra intense metallic black ( Fig. 12, 15 ). Abdominal terga III–V ( Fig. 12 ) with basal half dark reddish brown, almost black and apical margin light reddish brown; tergum VI ( Fig. 12 ) black with apical margin reddish brown; tergum VII ( Fig. 12 ) black with apical half light reddish brown. Prosternum, meso- and metaventrite dark reddish brown; abdominal sterna III–V ( Fig. 16 ) dark brown with lighter apical margin, sterna VI–VII black with apical margin reddish brown.

Head ( Fig. 13 ) wider (HW: 1.76) than long (HL: 1.31), with rounded hind angles, head disk with umbilicate punctures each carrying a single brownish microseta. Epicranium with grooves between umbilicate punctures, slightly convex; umbilicate punctures absent medially, denser posteriorly (about 5.51 punctures / 0.3 mm) than anteriorly (about 3.67 punctures / 0.3 mm), lateral density about 4.41 punctures / 0.3 mm. Eyes prominent ( Figs. 12–13 ), length (OL: 0.90), about 7/10 the length of head, distance between eyes (IO: 1.04) about 2.6 times the width of eyes (OW: 0.39). Gula very narrow posteriorly (GW: 0.04, GL: 1.22), gular sulci widely separated anteriorly and medially and contiguous posteriorly. Neck with 6–7 transverse irregular rows of umbilicate punctures; with grooves between umbilicate punctures ( Fig. 13 ). Antennae with scape gradually thickened, pedicel (0.27) slightly more than half the length of scape (0.51), pedicel and segment 3 similar in width (0.14), segment 3 longer (0.33) than pedicel (0.27), segment 4 (length 0.16:width 0.18) wider than long, segment 5 wider than long (0.16:0.18), segment 6 wider than long (0.16:0.20), segment 7 wider than long (0.16:0.22), segment 8 wider than long (0.16:0.22), segment 9 wider than long (0.16:0.22), segment 10 (0.16:0.24) wider than long; segments 4–11 densely covered by microsetae; scape, pedicel and segment 3 with black macrosetae disorderly arranged, segments 4–5 arranged in 3 rings, segments 6–10 forming two rings in the apical region and disorderly arranged on article 11.

Pronotum ( Fig. 14 ) longer than wide (PL: 1.96; PW: 1.69), wider anteriorly, lateral margins gently concave in posterior 2/3. Superior line of hypomeron completely visible in dorsal view. Disk with rounded umbilicate punctures (about 3.67 punctures / 0.3 mm), except on medial line that is abbreviated anteriorly and medially; microsculpture in form of grooves between umbilicate punctures. Scutellum ( Fig. 15 ) with black glossy setae and grooves. Elytra ( Fig. 15 ) wider than pronotum (EL: 2.00; EW: 2.20); punctation course and denser than on pronotum (about 4.52 punctures/ 0.3 mm); with golden microsetae, few black macrosetae arranged along lateral and posterior borders.

Legs ( Fig. 12 ) uniformly covered with brownish glossy microsetae, tibiae with black macrosetae; segments of protarsus 1–4 strongly bilobate and ventrally with yellowish setae.

Terga and sterna III–VII with brown and black setae, brown microsetae predominate on segments III–V and black macrosetae on terga and sterna VI–VII, black macrosetae arranged in row at the apical borders of all terga and sterna except tergum VII, posterior angles of terga and sterna III–VI with one longer black macroseta. Terga III–V with subbasal carina curved and transverse basal carina; subbasal carina fused to transverse basal carina in middle region. Basal carina on middle of sterna III–V ( Fig. 16 ) projected posteriorly, straight on sternum VI, almost straight on sternum VII and emarginate anteriorly on lateral third of sterna III–VII.

Male with median subbasal depression on sternum VII ( Fig. 17 ) covered with tuft of long setae. Sternum VIII and tergum X moderately emarginate, sternum IX emarginate. Tergum IX ( Fig. 19 ) long, straight, covered with prominent macrosetae. Aedeagus as in Figs. 20–21 ; paramere slender, asymmetrical, with rounded apical margin, subequal in length than median lobe. Sensory spinules as in Fig. 20 ; arranged in cluster medially. Median lobe asymmetrical, apex rounded; in lateral view apex bent dorsally.

Female similar to male, except first four protarsomeres less expanded.

Distribution. Known from La Merced, Fundo Génova-UNALM [Universidad Nacional Agraria La Molina], Junin, central region of Peru, 1150 m.

Habitat. From pitfall traps in rainforest.

Etymology. The species name is in honor of Lucie Souque, the collector of the specimens and a friend of the first author.

Figures

FIGURES 12 – 17. Philothalpus lucieae sp. n., holotype male. Dorsal aspect 12 – 15. Ventral aspect, 16 – 17. 12, general aspect; 13, head; 14, pronotum; 15, elytra; 16, sterna III – V; 17, sternum VII. Scale bars: 1.0 mm.

FIGURES 18 – 21. Philothalpus lucieae new species, holotype. 18, male sternum VIII, ventral aspect; 19, male terga IX – X, sternum IX, dorsal aspect; 20, aedeagus, dorsal aspect; 21, aedeagus, lateral aspect. Scale bar 1.0 mm. Dots indicate position of microsetae (18 - 19). Sternum eight (S 8), Sternum nine (S 9), Tergum ten (T 10).