Pselaphogenius treskanus (Karaman, 1940)

Davranoglou, Leonidas-Romanos, Baňař, Petr, Kakiopoulos, George, Balázs, Attila, Avtzis, Dimitrios N. & Hlaváč, Peter, 2023, Three new species of Afropselaphus Jeannel, 1950 (Staphylinidae: Pselaphinae) from Greece and a redescription of Pselaphogenius treskanus (Karaman, 1940), Zootaxa 5351 (5), pp. 559-570 : 568-569

Pselaphogenius treskanus (Karaman, 1940)

Figs 2D – 6D , 7G, F

Material studied. 2 ♁♁, 18 exx., with one label “ GREECE [GR 004], 20.vi.2021 / OROS VITSI, 2km SW DROSOPIGI Vill. / N40°40’13.4’’ E21°26’00.8’’ / sifting in Fagus forest along stream / 1062m, Winkler app. Extraction / P. Baňař, P. Hlaváč & A. Balázs lgt.” [white, printed] ( MMBC, PCPH); 3 ♁♁, 5 ♀♀, 37 undetermined sex, with one label “ GREECE [GR 010], 21.vi.2021 / OROS VITSI, 2km SE of OXYA Vill. / N40°37’17.4’’ E21°22’32.7’’ / sifting in Fagus forest, 1599m / Winkler app. extraction / P. Baňař, P. Hlaváč & A. Balázs lgt. ” [white, printed] ( MMBC, PCPH). 1 ♁, 4 undetermined sex, with one label “GR. Florina, No. 28, 15 km W Florina / Oros Varnous, 1600m / 40°47’51N, 21°14’42E / 23.4.2000, V. Assing ” [white, printed] PCVB ). 1 ♁, 1 undetermined sex, with one label “GR. Florina , No. 28, 15 km W Florina / Oros Varnous, 1600m / 40°47’51N, 21°14’42E / 23.4.2000, V. Assing ” [white, printed] PCVB ).

Supplement description. Body setation with shorter but denser hair than Afropselaphus ( Fig. 2D ); body length 2.0– 2.2 mm. Coloration largely dark brown, maxillary palpi and legs lighter, posterior margin of elytra much darker, almost black ( Fig. 2D ). Pilosity of body sparse; head, legs, and antennae covered by sparse, adjacent golden setae; frontal rostrum slightly bifid ( Fig. 3D ); eyes with 7–9 ommatidia ( Figs. 3D , 4D ); club of maxillary palpomere 4 elongate; ocular-mandibular carina less pronounced; median gular ridge produced into a rounded bulge ( Fig. 4D ), as in all congeners; metaventrite produced into pair of small protrusions ( Fig. 6D ); elytra with rounded external apex; elytral carinae more strongly pronounced; elytra with few rows of setae, which are denser on elytral marginal line; with row of setae on distal margin of elytra; abdomen distinctly wider than elytra; no tufts on gular plate; tufts on prothoracic-mesothoracic junction almost completely reduced, tufts on tergite 1 ( IV) and sternite 2 ( IV) much less dense than in other tergites; proximal margin of tergite II with very dense pilosity ( Fig. 2D ), remaining segment covered by sparse setae. Aedeagus ( Fig. 7G, H ) with single median sclerite with tapered apex.

Habitat. Mt Vitsi, this species was collected from leaf litter in dense forest ( Fig. 8D ).

Figures

FIGURE 2. Habitus photos of examined species of Pselaphini.A) A. taygetensis sp. n.; B) A. tymficus sp. n.; C) A. euboicus sp. n.; D) Pselaphogenius treskanus (Karaman, 1940). Scale bars correspond to 250 um.

FIGURE 3. Scanning electron microscopy image of dorsal view of head in the examined Pselaphini.A) A. taygetensis sp. n.; B) A. tymficus sp. n.; C) A. euboicus sp. n.; D) Pselaphogenius treskanus (Karaman, 1940). Scale bars correspond to 100 um.

FIGURE 4. Scanning electron microscopy image of lateral view of head in the examined Pselaphini.A) A. taygetensis sp. n.; B) A. tymficus sp. n.; C) A. euboicus sp. n.; D) Pselaphogenius treskanus (Karaman, 1940). Scale bars correspond to 100 um.

FIGURE 6. Lateral view of metaventrite in the examined Pselaphini, using scanning electron microscopy.A) A. taygetensis sp. n.; B) A. tymficus sp. n.; C) A. euboicus sp. n.; D) Pselaphogenius treskanus (Karaman, 1940). Scale bars correspond to 100 um.

FIGURE 7. Photomicrographs showing the dorsal aedeagal surface of the examined Pselaphini. A) A. taygetensis sp. n.; B) same, schematic; C) A. tymficus sp. n.; D) same, schematic; E) A. euboicus sp. n.; F) same, schematic; G) Pselaphogenius treskanus (Karaman, 1940); F) same, schematic. Blue dashed lines indicate membranous structures. All scale bars correspond to 200 um.

FIGURE 8. Habitat photos of examined species. A) Type locality of A. taygetensis sp. n. in Kastoreion; B) type locality of A. tymficus sp. n.; in Mt Tymfi; C) leaf litter where A. euboicus sp. n. was collected from in Mt Dirfis, the type locality; D) habitat in Mt Vitsi, where Pselaphogenius treskanus (Karaman, 1940) was collected from.