Pseudochroaptomus ecuadoriensis, Chani-Posse & Ramírez-Salamanca & Gualdrón-Díaz, 2024

Chani-Posse, Mariana Raquel, Ramírez-Salamanca, José Manuel & Gualdrón-Díaz, Juliette Cristina, 2024, Pseudochroaptomus ecuadoriensis-a new genus and species of Philonthina and its systematic placement (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 5448 (1), pp. 117-127 : 123

Pseudochroaptomus ecuadoriensis sp. n.

Diagnosis. As for the genus (see above).

Description. Body length 8.2–10.2 mm (4.9–5.9 mm, abdomen excluded), body overall scarcely setose, almost glabrous. Colouration: as in diagnosis. Head moderately to slightly longer than wide (HW/HL= 0.84–0.92), moderately narrower than pronotum at widest point (HW/ PW= 0.77); postgenal and ventral basal ridges joining each other medially; postmandibular ridge separated from mandibular base. Eyes about as long as temples (EL/TL = 0.96–1.0) seen from above. Antennae with first antennomere moderately shorter than second and third combined, third about 1.3 × as long as second, fourth-tenth longer than wide. Labial palpus with third palpomere about 1.5 × as long as second (Lp3L/Lp2L=1.4–1.6). Maxillary palpus with fourth palpomere (apical) no longer than 1.4 × as long as third (Mp4L/Mp3L=1.2–1.4). Neck about 0.6 × as wide as head at widest point. Pronotum moderately longer than wide (PW/PL = 0.83–0.86), dorsal rows of punctures each with 4 punctures. Legs: Mesotarsi and metatarsi each about as long as mesotibiae and metatibiae respectively, first metarsomere longer than fifth (S1/S5= 1.65– 1.80). Elytra at sides slightly to moderately longer than pronotum at midline (EtL/PL=1.07–1.31). Male sexual characters: Sternum 8 moderately emarginate medio-apically, emargination with semi-membranous extension ( Fig. 4 ). Aedeagus with median lobe gradually narrowed from base into a distinctly acute apex, parameres fused into a single, rod-like sclerite reaching two thirds of median lobe length, internal sac with spiny sclerotized structures ( Figs. 3 , 7, 8 ). Female sexual characters: As described for genus.

Geographical distribution. As for the genus.

Etymology. The specific name refers to the country of origin of this specimen.

Type material. Holotype m#, with labels: [white label]´ ECUADOR Napo prov. / Cabanas San Isidro, FIT / Cock of the Roach Trail / 2km NW Cosanga´,´00° 33´S, 77° 57´W / 20–23.vii.1998, 2150m, premontane rainforest´,´Ratcliffe, Jameson, Smith, Villatoro leg. FIELD MUS. NAT. HIST .´,´ Holotype Pseudochroaptomus Chani-Posse & Ramírez-Salamanca 2024 ´(red label) ( FMNH). Four paratypes with same data, 3 m #, 1 f# ( FMNH) .

Figures

FIGURES 4–8. Pseudochroaptomus ecuadoriensis, male genitalia [FMNH ©]: (4) male sternum 8; (5) male tergum 10; (6) sternum 9; (7) aedeagus in dorsal view; (8) aedeagus in lateral view (8). Scale bar = 1 mm.

FIGURES 2–3. Pseudochroaptomus ecuadoriensis (male paratype) [FMNH ©]: (2) maxillary palpi, labrum and frontoclypeus in dorsal view; (3) tergum 10 and lateral tergal sclerites in dorsal view, aedeagus in lateral view. Scale bar = 0.5 mm.