Pseudolycoriella hauta, Köhler, 2019

Köhler, Arne, 2019, The genus Pseudolycoriella Menzel & Mohrig, 1998 (Diptera, Sciaridae) in New Zealand, Zootaxa 4707 (1), pp. 1-69 : 37-38

Pseudolycoriella hauta sp. n.

( Figs 9 & 44 )

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Material studied. Holotype male. New Zealand: South Island , Clutha , Catlins, Purakaunui Scenic Reserve, mixed podocarp/broadleaf/ Nothofagus forest, Malaise trap, 27.01– 05.03.2002, leg. M. & C. Jaschhof ( NZAC, SDEI-Dipt- 0001134) . Paratypes. 3♂♂ same locality and same date as holotype (1x NZAC, SDEI-Dipt-0001137; 2x SDEI, SDEI-Dipt-0000506 & SDEI-Dipt-0001142) .

Description. Male. Head. Head capsule dark brown, laterally with several longer setae among the normal setosity. Eye bridge three to four facets wide. Scape and pedicel slightly paler brown than the flagellum; fourth flagellomere 2.5–2.8 times longer than wide; necks of flagellomeres well differentiated; surface of flagellomeres rough with deep pits, sensilla of two different lengths, small ones and longer, curved sensilla; setae on the flagellomere longer than flagellomere width, curved. Maxillary palp long and three-segmented, first palpomere is the longest, second one shortest; first palpomere with long sensilla and two to six long bristles, one bristle longer and more robust, located on the outer side. Prefrons and clypeus bulging. Thorax brown, mesonotum slightly darker. Posterior pronotum bare. Anterior pronotum with five to seven long and middle-sized setae. Episternum 1 with seven to nine long and medium sized setae. Mesonotum with six to seven robust lateral bristles. Scutellum with five to six robust bristles and several minor setae. Long dorsocentral bristles forming a complete row on the mesonotum. Katepisternum as long as high. Wing ( Fig. 9 ). Length 2.6–2.8 mm; width/length ratio 0.33–0.39. Membrane transparent and without macrotrichia, anal area present; all posterior veins distinct, apical 33–50% of R 5 with macrotrichia on ventral and dorsal side; bM bare, r-m with 1–3 macrotrichia (exceptionally r-m on one wing of one paratype bare); R 1 0.6–0.7 times as long as R; c/w ratio 0.70–0.75; r-m 0.7–0.9 as long as bM. Haltere brownish; head of haltere slightly longer than shaft. Legs brown, coxae as brown as thorax. Tibial organ surrounded by a circular border and as wide as half width of tibial apex; tibial organ consists of more than ten bristles arranged in an irregular row. Front tibia without robust bristle among vestiture. Mid tibia with one or two slightly robust bristles among vestiture. Posteriodorsal row of five to eight bristles mainly on middle of hind tibia. All tibial spurs equal in length. Claws with robust teeth. Abdomen brown, paler than thorax, with long, dark setae. Hypopygium ( Fig. 44 ). Gonocoxites wider than long, inner side of gonocoxites with short setae, outer side with long setae; ventral, inner side of gonocoxites basally separated. Gonostylus slender, 2.7–3.3 times longer than wide, apical third curved inward, not distinctly delimited; inner side concave; apical cavity long and remaining inner side without microtrichia, ventral margin distinct; one spine present, located at the apex; long whip-lash hair present. Tegmen of the typical ground plan of the Psl. jejuna complex, with an acuminate basic shape; dorsal folds present; parameral apodemes basally strongly sclerotized, medially connected. Area of teeth absent. Ejaculatory apodeme short and dark, base of ejaculatory apodeme pale brown. Posterior portion of gonocoxal apodeme medium sized and brown, joined medially. Anterior portion of gonocoxal apodeme of medium-length and dark brown.

Body size: 2.7–3.2 mm.

Female. Unknown.

Genetic distances. All four available COI sequences are identical and do not show any pairwise distance. The nearest neighbour is Psl. tewaipounamu , diverging by a minimum of 8.68%. The nearest neighbour of the only available 28S sequence is Psl. tewaipounamu , diverging by a minimum of 0.17%.

Etymology. Hauta is the Māori word for south. The name for this new species reflects the southern distribution of this species.

Distribution. New Zealand.

Discussion. Among the species of the Psl. jejuna complex examined during this study, Psl. hauta has the most developed setosity on the mesonotum, the anterior pronotum, the episternum 1, and the scutellum. Furthermore, the shape of the gonostylus is unique and allows a clear delimitation from the other species of the complex. The spine on the gonostylus lies at the inner angle of the gonostylus apex and is more apically located than in all the other species. Another distinguishing feature is the prominent ventral margin. Due to the more concave inner side of the gonostylus the ventral margin is more obvious than in the related species.

Figures

FIGURES 1–9. Various body parts of Pseudolycoriella spp., in lateral view. 1. Pseudolycoriella dagae sp. n., fourth flagellomere. 2. Pseudolycoriella jejunella sp. n., fourth flagellomere. 3. Pseudolycoriella aotearoa sp. n., fourth flagellomere. 4. Pseudolycoriella bispina Mohrig, fourth flagellomere. 5. Pseudolycoriella puhihi sp. n., fourth flagellomere. 6. Pseudolycoriella jejunella sp. n., palp. 7. Pseudolycoriella robustotegmenta sp. n., head. 8. Pseudolycoriella jejunella sp. n., tibial organ. 9. Pseudolycoriella hauta sp. n., wing. Abbreviations: aa = anal area; bM = base of the medial vein; c = distance between intersection of vein R5 and radial vein and the end of costal vein; CuA1/CuA2 = first and second branch of the anterior branch of the cubital vein; M1/M2 = first and second branch of the medial vein (“M-fork”); R = radial vein; R1/R5 = first and fifth branch of the radial vein; r-m = crossvein between radial and median veins; w = distance between intersection of vein R5 and radial vein and intersection of vein M1 and wing margin.

FIGURES 43–47. Pseudolycoriella jejuna complex, hypopygia. 43. Pseudolycoriella tewaipounamu sp. n. 44. Pseudolycoriella hauta sp. n. 45. Pseudolycoriella whakahara sp. n. 46. Pseudolycoriella jejunella sp. n. 47. Pseudolycoriella maddisoni sp. n.