Pseudolycoriella jaschhofi, Köhler, 2019

Köhler, Arne, 2019, The genus Pseudolycoriella Menzel & Mohrig, 1998 (Diptera, Sciaridae) in New Zealand, Zootaxa 4707 (1), pp. 1-69 : 61-62

Pseudolycoriella jaschhofi sp. n.

( Fig. 56 )

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Material studied. Holotype male. New Zealand: South Island , Buller, Lewis Pass, altitude 850 m, tussock grassland at beech forest edge, Malaise trap, 26.11– 25.12.2001, leg. M. & C. Jaschhof ( NZAC, SDEI-Dipt-0001199) . Paratypes. 12♂♂ same locality and same date as holotype (6x NZAC, SDEI-Dipt-0001036, SDEI-Dipt-0001207, SDEI- Dipt-0001209 & SDEI-Dipt-0001210; 6x SDEI, SDEI-Dipt-0001198, SDEI-Dipt-0001201, SDEI-Dipt-0001203 & SDEI-Dipt-0001217) . 5♂♂ South Island , Southland , Fiordland, Fiordland NP, 4 km E Milford Sound, mixed broadleaf/ Nothofagus forest, sweep net, 07.01.2002, leg. M. Jaschhof (3x NZAC, SDEI-Dipt-0001332, SDEI-Dipt- 0001341 & SDEI-Dipt-0001342; 2x SDEI, SDEI-Dipt-0000892 & SDEI-Dipt-0000896) . 8♂♂ South Island , South- land, Fiordland , Fiordland NP, Hollyford River Valley, Moraine Creek Track, mixed podocarp/ Nothofagus forest, Malaise trap, 05– 24.01.2002, M. & C. Jaschhof (4x NZAC, SDEI-Dipt-0001343, SDEI-Dipt-0001345, SDEI- Dipt-0001512, SDEI-Dipt-0001513; 4x SDEI, SDEI-Dipt-0001344, SDEI-Dipt-0001511, SDEI-Dipt-0001514 & SDEI-Dipt-0001515) . 8♂♂ South Island , Southland , Otago Lakes , Fiordland NP, Eglinton River Valley, Deer Flat, Nothofagus forest, Malaise trap, 04– 24.01.2002, leg. M. & C. Jaschhof (4x NZAC; 4x SDEI) . 1♂ same locality as previous, Malaise trap, 01– 20.12.2002, leg, M. & C. Jaschhof & U. Kallweit ( SDEI, SDEI-Dipt-0000962) . 6♂♂ South Island , Southland , Otago Lakes , Fiordland NP, Eglinton River Valley, opposite Earl Mountain Tracks, Nothofagus forest, Malaise trap, 05– 24.01.2002, leg. M. & C. Jaschhof (3x NZAC, SDEI-Dipt-0000848, SDEI-Dipt- 0000850 & SDEI-Dipt-0000851; 3x SDEI, SDEI-Dipt-0000852, SDEI-Dipt-0000868 & SDEI-Dipt-0000872) . 4♂♂ South Island , Southland , Otago Lakes , Fiordland NP, Hollyford River Valley S Divide Creek, mixed Nothofagus /broadleaf forest, Malaise trap, 06– 24.01.2002, leg. M. & C. Jaschhof (2x NZAC; 2x SDEI) .

Description. Male. Head brown; eye bridge one to three facets wide. Flagellomeres concolourous with scape and pedicel; fourth flagellomere 2.6–3.1 times as long as wide; necks of flagellomeres differentiated; surface of flagellomeres rough with deep pits; sensilla of two different length; setae sparsely scattered, approximately as long as flagellomere width, bases of setae with slightly raised coronas. Prefrons and clypeus moderately bulging. Maxillary palp three-segmented; first palpomere longest, third slightly longer than second; first palpomere with up to five bristles and an inconspicuous small patch of sensilla. Thorax pale brown, paler than head. Posterior pronotum bare. Anterior pronotum with two to five bristles. Episternum 1 with four to ten bristles. Mesonotum with several longer bristles among the laterals and among the dorsocentral bristles. Scutellum with four robust and some shorter bristles. Katepisternum bicoloured, basal part pale brown, apical third brown; as long as high. Wing. Length 1.9–2.2 mm; width/length ratio 0.35–0.41. Membrane transparent and without macrotrichia, anal area present; all posterior veins distinct except faint stem of M, all without macrotrichia; apical quarter of R 5 with two to seven additional macrotrichia on ventral side; bM and r-m bare, r-m exceptionally with one to two macrotrichia; R 1 short, 0.67–0.80 times as long as R; M-fork longer than stem of M; c/w ratio 0.67–0.72; r-m and bM equal in length. Haltere pale brown. Legs pale brown; coxal bristles dark. Fore tibia with one to two bristles among vestiture on ventral side; tibial organ comprising more than half of tibial apex, consisting of a transverse patch of bristles surrounded by a robust circular border. Mid tibia with one or two anterioventral and two to four posterioventral robust bristles among vestiture. Hind tibia with several robust bristles on anterioventral, posterior and posterioventral sides and a longitudinal row of robust bristles, which extends along two-thirds of length of tibia. Basal tarsomere of all legs with conspicuous robust bristles. All tibial spurs equal in length. Claws with teeth. Abdomen. Pale brown, with dark bristles. Hypopygium ( Fig. 56 ) as pale brown as abdomen. Gonocoxites wider than long; ventrally v-shaped and not fused, without a basal lobe of bristles. Gonostylus slender, apical quarter curved inwards, 3.3–4.0 times longer than wide; apically with dense setae and a group of approximately eight small spines; subapically one short whip-lash hair, which is two times as long as the apical spines. Tegmen broad and membranous, only strongly sclerotized on lateral and basal margins; wider than long, with short parameral apodemes; apically membranous with a robust hood-like structure; dorsal structures absent. Area of teeth with six to 20 conspicuous teeth. Ejaculatory apodeme short and very dark with a large base. Posterior portion of gonocoxal apodeme long and brown. Anterior portion of gonocoxal apodeme apodeme long.

Body size: 1.8–2.5 mm.

Female. Unknown.

Genetic distances. The maximum p-distance between all 13 available COI sequences is 1.83%. The nearest neighbour is Psl. teo , diverging by a minimum of 4.92%. The maximum p-distance between all three available 28S sequences is 0.49% (this high p-distance results from some ambigious positions at the beginning of one sequence [SDEI-Dipt-0001511]). Some of these sequences are identical to those of Psl. frederickedwardsi, Psl. gonotegmenta, Psl. huttoni, Psl. macrotegmenta, Psl. plicitegmenta, Psl. robustotegmenta, Psl. subtilitegmenta, Psl. tonnoiri , and Psl. wernermohrigi .

Etymology. The new species is named after Dr Mathias Jaschhof, to honour his work on the Sciaroidea and to express the author’s thanks for his manifold support.

Distribution. New Zealand.

Discussion. Among the species of the Psl. macrotegmenta complex this new species can easily be recognised by the hood-like structure on the tegmen, which otherwise only appears in Psl. aotearoa and Psl. zealandica . Furthermore, Psl. jaschhofi has a very elongated gonostylus, which it only shares with the otherwise unmistakable Psl. dentitegmenta . Pseudolycoriella attrita Mohrig from Papua New Guinea has very similarly shaped gonostyli and tegmen (Mohrig, 2013), but a much smaller body size and shorter flagellomeres (1.8 vs. 2.6–3.1). Additionally, the two gonostylar spines of Psl. attrita are well developed and clearly visible among the apical setae, while in Psl. jaschhofi the spines are more numerous and not so easy to distinguish from the apical setae.

Figures

FIGURES 55–60. Pseudolycoriella macrotegmenta complex, hypopygia. 55. Pseudolycoriella fiordlandia sp. n. 56. Pseudolycoriella jaschhofi sp. n. 57. Pseudolycoriella frederickedwardsi Köhler 58. Pseudolycoriella tonnoiri Köhler 59. Pseudolycoriella breviseta Mohrig 60. Pseudolycoriella dentitegmenta sp. n.