Philosepedon (Philosepedon) perdecorum 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 : 37-40

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

Diagnosis. P. perdecorum sp. nov. (described below) has four facet rows in the eye bridge, flagellomeres 12 and 13 are irregularly cut ( Fig. 35 ), the hair patch on the anepisternum is almost oval (Fig. 27), the wings ( Fig. 37 ) are infuscated among the Sc, and the base of R1 and C, the medial fork is conspicuously incomplete in contrast to the radial fork, R2 is strengthened in the middle, the gonapophyses are conspicuously and irregularly wrinkled by many folds ( Figs. 42–44 ), the parameres are clearly bent from the lateral view ( Fig. 43 ), the hypandrium ( Fig. 42 ) has two conspicuous unsclerotized cavities on both sides, and the terminal radiating network of retinaculi is missing (Figs. 32, 41).

Type locality. Czech Republic, Bohemia or., Mĕlčany nr. Dobruška (5763), agricultural area with the alluvium of Zlatý potok brook.

Type material. Holotype: Czech Republic, Bohemia or., Mĕlčany nr. Dobruška (5763), the alluvium of Zlatý potok brook, MT, 22.iv–8. v.2002, 1 male, J. Ježek, P. Chvojka and J. Macek leg.; meanders of the brook, shaded by trees and shrubs, Alnus , Picea, Fraxinus , Salix , Frangula , Caltha , Nasturtium , Urtica , slide Cat. No. 34565, Inv. No. 19729, dissected. Paratypes: 2 males, dissected, slides. South-eastern Moravia, Bílé Karpaty PLA, Knĕždub env., Knĕždubský háj grove, Kejda pond (7170), SW, 21. ix.2005, 1 male, J. Ježek leg.; swamps, Alnus , Mentha , Juncus , Leonurus , Scirpus , slide Cat. No. 34566, Inv. No. 19730. The Netherlands, De Kaaistoep NR env. Tilburg, UTM FT 398124, MT, 20.–27. vi.1998, 1 male, J. W. van Zuiljen leg.; most interesting plants Illecebrum , Luronium , Anthoceros , Phaeoceros , slide Cat. No. 34567, Inv. No. 19731. All material is deposited in the NMPC.

Description. Male. Head almost oviform in outline, vertex about 0.5 times width of the eye bridge on midline (Fig. 22), 5–8 supraocular lateral bristles not conspicuously isolated on the dorsal margins of the eye bridges, eyes not touching, interocular suture slightly sclerotized, with triangular dorsal extension at the mid-line and doubled by the transparent arcuate streak at basis; frons is most likely three facet diameters wide posteriorly to the antennal bases (Fig. 22); eye bridge consisting of four facet rows (the number may be lower closer to the frontal suture and on both sides of eye apices in some distance to the frontal eye margin). Border of hairs above the frontal suture is irregularly convex on both sides, with a small bare patch in the middle axis. Scar patch of frontoclypeus trilobed with a narrow and conspicuous vertical lobe, penetrating almost to the interocular suture, lateral lobes shorter and cut. Antennae ( Figs. 34, 35 ) with 16 antennomeres. Scape very short, cylindrical, pedicel subspherical, 1.3 times broader then scape, both with long knife-shaped scales as long as the pedicel or longer. Basal ten flagellomeres amphora-shaped, symmetrical except for the postpedicel. Terminal four antennomeres anomalous, with reduced necks, 11th flagellomere ovoid, the terminal three antennomeres are conspicuously minute, flagellomeres 12 and 13 irregularly cut, terminal flagellomere approximately pear-shaped. Ascoids Y-shaped (Fig. 23), paired, with a very short stem, branches strong, knife-shaped. Relative length of maxillary palpomeres 1.0:1.4:2.0:1.9, last palpomere not annulated (Fig. 25), maxillary hairs are regularly spaced basally and distally (Fig. 26). Origin of labial apodeme pestle-shaped, cleft between the terminal lobes of the labium very deep (Fig. 24). Ratio of the maximum length of the cibarium to the length of the epipharynx is 1.6:1 (Fig. 22), labrum is setose (Fig. 26). Anepisternum with oval patch of setae (Fig. 27), prothoracal spiracle circular ( Fig. 36 ). Wings ( Fig. 37 ) comparatively narrow, with attenuate acute apex, 2.2 mm long, membrane translucent, inconspicuously infuscated by very small elongated lines in the basal cell, between the origin of R2+3 and R1, and conspicuously between C, Sc and base of R1 with a long linear streak running parallel above the distal part of R1, gradually tapering off. Basal costal nodes distinct, clearly visible, Sc thick, rectangular, slightly bent, not interrupted. Medial fork is conspicuously incomplete, basal of the complete radial fork. Strengthened veins or their parts: Sc, R1 and R2 medially, R4 basally, most of R5, M1+2 basally, M3 only inconspicuously at its origin, CuA1 and CuA2 conspicuously. The angle of the base of R2 and R3 is acute. M3, CuA1 and CuA2 are without a connection basally. R5 ending at wing apex. CuA2 not reaching the wing margin. Maximum wing length equal to 2.6 times its maximum width. Halteres (Fig. 28) stickshaped, bare, surface with many pits, maximum length of halteres equal to 3.2 times their maximum width. Ratios of lengths of femora, tibiae and first tarsomeres: P1 = 1.8:2.0:1.0; P2 = 2.0:2.7:1.2; P3 = 2.1:3.3:1.2; tibiae with a line of small spines posteroventrally, fore claws pointed and bent distally, haired in the basal half, dorsal tooth blunt-ended (see Fig. 29). Aedeagal complex typical for the humerale species group ( Figs. 42–44 ). Basal apodeme spatulate from dorsal view, kidney-shaped from the lateral one, elongated. Aedeagus very short, simple, rounded, conspicuously inflated apically, bifid, inner sticks of gonapophyses are in parallel lines, of the same length, clearly wrinkled by many folds. Parameres are elongated, extended distally, tapering to a sharp point, FIGURES 22–32. Philosepedon perdecorum Omelková & Ježek sp. nov., male. 22. Head, 23. Ascoid, in detail, 24. Terminal lobes of labium, 25. Maxilla and palpus maxillaris, 26. Maxilla, cibarium, epipharynx and labrum, in detail, diagonal view, 27. Thoracic sclerites, lateral view, 28. Haltere, 29. Claws of P1, various views, 30. Gonopod, dorsal view, 31. Same, diagonal view, 32. Epandrium and surstyli, dorsal view. [Scale: 23, 29 = 0.05 mm; 24, 26, 28, 30 – 32 = 0.1 mm; 22, 25, 27 = 0.2 mm] straight from the dorsal and caudal view (only inconspicuously arched), conspicuously bent from the lateral view. Gonocoxites (Figs. 30, 31, 38, 44) clearly truncate, conical, widened basally, with several setae on mesal margin, gonostyles approximately as long as gonocoxites, bent, gradually tapering to the apex, with one long subapical seta. Epandrium (Figs. 32, 39, 40) dome-shaped in dorsal view, haired on both sides, with one aperture basally, not completely sclerotized (only in lateral parts). Ventral epandrial plate inconspicuous, membraneous, visible only in lateral view ( Fig. 39 ). Hypoproct tongue-shaped, epiproct fold-like, both haired (hairs of hypoproct are longer). Hypandrium narrow, slightly widened in the middle ( Figs. 42 ), with two large unsclerotized cavities (alveoli) on both sides. Surstyli (Figs. 32, 39, 41) cylindrical, only slightly widened proximally, inconspicuously bent (dorsal and lateral view), with one strong bristle on the inner side basally, apically bifurcate with two long retinacula. Surstyli are 1.6 times as long as retinacula. The retinacula are not decorated terminally by a radiating network (Figs. 32, 41) from the dorsal view.

Female unknown.

Etymology. Due to its unique characters, such as the aedeagal complex , this species was named perdecorum from the latin adjective perdecorus, meaning smart.

Biology. Unknown.

Distribution. Currently known only from the Czech Republic and the Netherlands.

Figures

FIGURES 33 – 44. Philosepedon perdecorum Omelková & Ježek sp. nov., male. 33. Facetae, in detail, 34. Basal antennomeres, 35. Apical antennomeres, 36. Inexpressive thoracic allurement organ and spiracle, 37. Wing, 38. Gonopod laterally, 39. Epandrium and surstylus, lateral view, 40. Epandrium, dorsal view, 41. Surstylus, dorsal view, 42. Aedeagal complex, dorsal view, 43. Same, lateral view, 44. Aedeagal complex and gonopods, caudal view. [Scale: 33, 36, 42, 44 = 0.05 mm; 35, 38 – 41, 43 = 0.1 mm; 34 = 0.2 mm; 37 = 1 mm]