Philosepedon (Philosepedon) dumosum Omelková & Ježek, 2012

Omelková, Markéta & Ježek, Jan, 2012, Two new species of Philosepedon Eaton (Diptera, Psychodidae, Psychodinae) from Europe, with comments on subgeneric classification, Zootaxa 3275, pp. 29-42 : 33-36

Philosepedon (Philosepedon) dumosum Omelková & Ježek sp. nov.

Diagnosis. The eye bridge consists of three facet rows, flagellomeres 12 and 13 are not irregularly shaped (Fig. 11), the hair patch on the anepisternum is elongated, almost narrowly triangular (Fig. 15), the wings (Fig. 17) are not infuscated near Sc and the bases of C and R1, the medial and radial forks are complete, R2 is not strengthened, the gonapophyses are smooth, not wrinkled ( Figs. 9 , 20–21), the parameres are only slightly bent from the lateral view (Fig. 21), the hypandrium (Fig. 20) has two to four very small unsclerotized cavities laterally, and the retinacula have a network of radiating field terminally ( Fig. 8 ) from the dorsal view.

Type locality. Czech Republic, South-western Moravia, Dyje river valley between the towns Vranov nad Dyjí (in the west) and Znojmo (in the east) along the Czech–Austrian state border, damp deciduous wood, 300 m a.s.l., 48°48'12"N 15°58'22"E.

Type material. Holotype: Czech Republic, South-western Moravia, Podyjí NP, Hnanice (7161/7261), 48°48'12"N 15°58'22"E, 300 m a.s.l., MT, 27.iii.–29. iv.2001, 1 male, M. Barták and Š. Kubík leg.; edge of damp deciduous wood, including ecotone and residual growth of reeds, 1.5 km NW of Hnanice, slide Cat. No. 34562, Inv. No. 19726, dissected. Paratypes: 2 males, dissected, slides. North-western Moravia, Jeseníky PLA, Jeseník env. (5769), Bukovice, Bukovický vrch hill (557 m a.s.l.), SW, 21. ix.1998, 1 male, Ježek leg.; small stream, wet meadows, ditches and swamps, Alnus , Betula , Caltha , Filipendula , Senecio , Rubus, Pteropsida, Musci , Poaceae , slide Cat. No. 34563, Inv. No. 19727. Bohemia or., Železné hory PLA, Zlatá louka meadow NNR env. Podmoklany (6260), SW, 13. vi.1999, 1 male, Ježek leg.; inundated meadows and swamps, Alnus , Caltha , Filipendula , Phragmites , Nasturtium , Equisetum , Myosotis , slide Cat. No. 34564, Inv. No. 19728. All material is deposited in the NMPC.

Description. Male. Head rounded, vertex about 0.5 times width of the eye bridge on midline ( Fig. 1 ), four–five supraocular lateral bristles isolated on the dorsal margins of the eye bridges, eyes separated, not touching, minimum width of frons equal to the width of two facet diameters, interocular suture dark, conspicuous, with triangular dorsal extension at the mid-line and duplicated by the arcuate streak at basis, nearly transparent in central part; frons is most likely more than three facet diameters wide posteriorly to the antennal bases (Fig. 10); eye bridge consisting medially of three facet rows, bases of eyebridges occasionally with fewer. Horizontal border of hairs above the frontal suture slightly convex on both sides, with a deep medial cleft. The setae alveoli patch of the frontoclypeus is trilobed with a narrow vertical pointed lobe medially, extending almost to the interocular suture, the lateral lobes are shorter than the median lobe, rounded, not reaching the ventral eye margin. Antennae ( Figs. 2, 3 , 11) with 16 antennomeres. Scape very short, cylindrical, somewhat widened distally, pedicel globullar and shorter, both scape and pedicel covered with spatulate setae, almost as long as the pedicel. Flagellomeres amphorashaped, symmetrical. Last four antennomeres are anomalous, ovoid with reduced necks, terminal three antennomeres conspicuously minute. Ascoids Y-shaped ( Fig. 3 ), paired, with a reduced stem, and stout knifeshaped branches ( Fig. 3 ). Relative length of the maxillary palpomeres are 1.0:1.4:1.9:1.8, the apical palpomeres not annulated ( Figs. 5 , 12). Terminal palpomere more densely haired. Origin of labial apodeme spatulate, not pestle-shaped, the cleft between terminal lobes of the labium has a shallow (inconspicuous) apical concavity ( Fig. 4 ). The ratio of the maximum length of the cibarium to the length of the epipharynx is 1.6:1 (Fig. 13), the labrum is bare (Fig. 14). Thorax: the hair patch on the anepisternum is elongated, narrowly subtriangular (Fig. 15), prothoracal spiracle with several folds. Wings (Fig. 17.) narrow, lancet-shaped, 2.1 mm long, generally clear, inconspicuously infuscated in the basal cell, between the origin of R2+3 and R1, as well as in a long linear streak running parallel above the distal part of R1. Basal costal nodes distinct, clearly visible. Sc not interrupted. Medial fork clearly basal to radial fork, bothforks complete. Strengthened veins or their parts: Sc, most of R1, radial fork, R4 basally, most of R5, M1+2 basally, CuA1 and CuA2 completely. The angle of the basal part of R2 and R3 acute, the angle of the distal part of R2+3 and R2 a little larger than the angle of R2+3 and R3. The angle of the base of M1 and M2 is obtuse at first, then acute, the angle of the distal part of M1+2 and M1 is larger than the angle of M1+2 and M2. M3, CuA1 and CuA2 are not connected basally. R5 extends distally to reach the wing margin at the apex of the wing, in contrast to the weakened ends of R3, R4, M1, M2 and CuA2. Wing indices AB:AC:AD = 2.0:2.7:2.5; BC:CD:BD = 1.0:1.0:1.5. Maximum wing length equal to 2.6 times its maximum width. Medial wing angle is 100° (BCD). Halteres (Fig. 16) stick-shaped, bare, surface with pits, maximum length of haltere equals 2.3 times its maximum width. Ratios of lengths of femora, tibiae and first tarsomeres: P1 = 2.0:2.3:1.0; P2 = 2.2:2.8:1.2; P3 = 2.3:3.7:1.3; fore claws pointed and bent distad (Fig. 18), haired in basal half. Aedeagal complex typical for humerale species group ( Figs. 9 , 20 and 21). Basal apodeme club-shaped in dorsal view, and stick-shaped in lateral view. Aedeagus very short, simple, rounded, slightly inflated apically, bifid, inner sticks parallel, of the same length, smooth. Parameres long, kidney-shaped basally, extended distally, tapering to a sharp point, straight from the dorsal view, bent from the lateral one and irregularly deformed from the caudal view. Gonocoxites ( Figs. 5, 9 , 20) are truncate, conical, widened basally, with about six setae on the mesal margin, gonostyles somewhat shorter, bent, gradually tapering to apex, with one subapical seta. Epandrium ( Figs. 7 , 19) dome-shaped in dorsal view, haired on both sides, with one aperture in the basal third. Ventral epandrial plate inside inconspicuous, membraneous. Hypoproct and epiproct setose, crease- or fold-shaped. Hypandrium narrow, slightly wider in the middle (Figs. 20), with two to four very small unsclerotized cavities (alveoli) on both sides. Surstyli ( Figs. 7, 8 , 19) nearly cylindrical, widened basally, inconspicuously bent from the lateral view, straight from the dorsal one, with one strong bristle on the inner side in the basal third, apically bifurcate with two long retinacula on the disunited apex. Surstyli are 1.6 times as long as retinacula. The retinacula have a radiating network terminally from the dorsal view ( Fig. 8 ), conspicuously widened from the lateral one ( Fig. 7 ).

Female unknown.

Etymology. Dumosus, latin, adjective, meaning bushy. The species name is based on the shrubby habitats in which it was collected.

Biology. Unknown.

Distribution. Only known from three localities in the Czech Republic.

FIGURES 10–21. Philosepedon dumosum Omelková & Ježek sp. nov., male. 10. Facetae, in detail, 11. Apical antennomeres, 12. Maxilla and palpus maxillaris, 13. Cibarium and epipharynx, dorsal view, 14. Labrum and epipharynx, diagonal view, 15. Thoracic sclerites, lateral view, 16. Haltere, 17. Wing, 18. Claws of P1, various views, 19. Epandrium and basal parts of surstyli, dorsal view, 20. Aedeagal complex and gonopods, dorsal view, 21. Aedeagal complex , lateral view. [Scale: 10, 18, 20 – 21 = 0.05 mm; 11 – 14, 16, 19 = 0.1 mm; 15 = 0.2 mm; 17 = 1 mm]

Figures

FIGURES 1 – 9. Philosepedon dumosum Omelková & Ježek sp. nov., male. 1. Head, 2. Basal antennomeres, 3. Middle flagellomere with one ascoid (the second ascoid is omitted), 4. Terminal lobe of labium, 5. Maxilla and first palpomere, in detail, 6. Gonocoxite and gonostyle, lateral view, 7. Epandrium and surstylus, lateral view, 8. Surstylus, dorsal view, 9. Aedeagal complex and gonopods, caudal view. [Scale: 4 – 5, 9 = 0.05 mm; 1, 3, 6 – 8 = 0.1 mm; 2 = 0.2 mm]