Pseudolycoriella sudhausi, Köhler, 2019

Köhler, Arne, 2019, The genus Pseudolycoriella Menzel & Mohrig, 1998 (Diptera, Sciaridae) in New Zealand, Zootaxa 4707 (1), pp. 1-69 : 42-44

Pseudolycoriella sudhausi sp. n.

( Fig. 37

urn:lsid:zoobank.org:act:NomenclaturalActs/ 427BBF3C-2DDD-44CA-B7BF-76C0B15212BA)

Material studied. Holotype male. New Zealand: Stewart Island , Southland, Kaipipi Bay 3 km W Halfmoon Bay, mixed broadleaf/podocarp forest, sweep net, 07.03.2002, leg. M. Jaschhof ( NZAC, SDEI-Dipt-0001090) . Paratypes. 1♂ same locality and same date as holotype ( SDEI, SDEI-Dipt-0001093) . 2♂♂ South Island , Westland , Waiatoto; Kahikatea swamp forest, Malaise trap, 16.10– 20.11.2001, leg. M. & C. Jaschhof (all SDEI) . 2♂♂ South Island , Westland , Westland NP, Lake Matheson, mixed podocarp forest, exhauster, 22.10.2001, leg. M. Jaschhof ( NZAC; SDEI) . 2♂♂ South Island , Westland , Westland NP, SE Gillespies Beach, mixed podocarp forest, exhauster, 19.10.2001, leg. M. Jaschhof ( NZAC; SDEI) . 3♂♂ South Island , Southland , Fiordland , Fiordland NP, Hollyford River Valley, Moraine Creek Track, mixed podocarp/ Nothofagus forest, Malaise trap, 05– 24.01.2002, leg. M. & C. Jaschhof (2x NZAC, SDEI-Dipt-0000885 & SDEI-Dipt-0000922; 1x SDEI, SDEI-Dipt-0000929) . 6♂♂ South Island , Southland , Otago Lakes , Fiordland NP, Eglinton River Valley, 2 km N entrance Earl Mountain Tracks, Nothofagus forest, Malaise trap, 01– 21.12.2002, leg. M. & C. Jaschhof & U. Kallweit (3x NZAC, SDEI-Dipt- 0001167 & SDEI-Dipt-0001175; 3x SDEI, SDEI-Dipt-0001170 & SDEI-Dipt-0001459) . 6♂♂ South Island , South- land, Otago Lakes , Fiordland NP, Eglinton River Valley, 2 km N entrance Gladehouse Track, Nothofagus forest, Malaise trap, 01– 20.12.2002, leg. M. & C. Jaschhof & U. Kallweit (2x NZAC, SDEI-Dipt-0001147 & SDEI-Dipt- 0001148; 4x SDEI, SDEI-Dipt-0001146, SDEI-Dipt-0001149 & SDEI-Dipt-0001177) . 2♂♂ South Island , South- land, Otago Lakes , Fiordland NP, Eglinton River Valley, opposite Gladehouse Track, Nothofagus forest, sweep net, 03– 04.12.2002, leg. M. Jaschhof ( NZAC; SDEI) . 4♂♂ same locality as previous, Malaise trap, 01– 21.12.2002, leg. M. & C. Jaschhof & U. Kallweit (3x NZAC, SDEI-Dipt-0001009, SDEI-Dipt-0001013 & SDEI-Dipt-0001015; 1x SDEI, SDEI-Dipt-0001011) . 1♂ South Island , Southland , Otago Lakes , Fiordland NP, Eglinton River Valley, Deer Flat, Nothofagus forest, Malaise trap, 04– 24.01.2002, leg. M. & J. Jaschhof ( SDEI) . 1♂ same locality as previous, Malaise trap, 01– 20.12.2002, leg. M. & C. Jaschhof & U. Kallweit ( NZAC) . 1♂ Stewart Island , Southland , Rakiura Track between Kaipipi Bay and Sawdust Bay, mixed podocarp/broadleaf forest, sweep net, 07.03.2002, leg. M. Jaschhof ( NZAC) . 6♂♂ Stewart Island , Southland , Rakiura Track between Sawdust Bay and North Arm Hut, mixed podocarp/broadleaf forest, sweep net, 08.03.2002, leg. M. Jaschhof (2x NZAC; 4x SDEI, SDEI-Dipt-0001071 & SDEI-Dipt-0001116) . 5♂♂ Stewart Island , Southland, Freshwater Landing Hut, mixed podocarp/manuka/broadleaf forest, sweep net, 12.03.2002, leg. M. Jaschhof (3x NZAC; 2x SDEI) . Additional material. 1♂ South Island , South- land, Otago Lakes , Fiordland NP, Eglinton River Valley , opposite Earl Mountain Tracks , Nothofagus forest, Malaise trap, 01.12– 21.12.2002, leg. M. & C. Jaschhof & U. Kallweit ( SDEI; specimen in poor condition) .

Description. Male. Head. Head capsule brown. Eye bridge two to three facets wide. Scape and pedicel slightly paler brown than the flagellum; fourth flagellomere 2.9–3.5 times longer than wide; necks of flagellomeres well differentiated, length of necks increase towards the antennal apex; surface of flagellomeres rough with deep pits, sensilla of two different lengths, small ones and longer, curved sensilla; setae on the flagellomere longer than the flagellomere width, slightly curved. Maxillary palp long and three-segmented, first palpomere is the longest one, second one shortest; first palpomere with long sensilla and two to four long bristles, one bristle longer and more robust, located on the outer side of the first palpomere. Prefrons and clypeus bulging. Thorax pale brown, mesonotum slightly darker. Posterior pronotum bare. Anterior pronotum with four to five setae. Episternum 1 with three to seven setae. Mesonotum with four to five robust lateral bristles. Scutellum with three to four robust bristles and several minor setae. Dorsocentral bristles forming a complete row on the mesonotum, anterior ones smaller. Katepisternum as long as high. Wing. Length 2.2–2.8 mm; width/length ratio 0.37–0.41. Membrane transparent and without macrotrichia, anal area present; all posterior veins distinct, except faint stem of M, apical 33–50% of R 5 with macrotrichia on ventral and dorsal side; bM and r-m bare (except one paratype [SDEI-Dipt-0000922] with one macrotricha on r-m on one wing); R 1 0.6–0.9 times as long as R; c/w ratio 0.76–0.81; r-m 0.9–1.3 as long as bM. Haltere brownish; shaft of haltere longer than head. Legs pale brown, slightly paler than thorax, occasionally mid and hind coxae concolourous with thorax. Tibial organ surrounded by a circular border and slightly wider than half of the width of the tibial apex; tibial organ consists of an irregular row of bristles. Front tibia without robust bristles among the vestiture (occasionally one bristle). Mid tibia with one slightly robust bristle among vestiture, or bristle missing. Posteriodorsal row of bristles inconspicuous, one to four weak bristles. All tibial spurs equal in length. Claws with robust teeth. Abdomen concolourous with thorax, with long, dark setae. Hypopygium ( Fig. 37 ). Gonocoxites wider than long, inner side of gonocoxites with medium sized setae, outer side with long setae; ventral, inner side of gonocoxites basally separated. Gonostylus elongate, 2.6–3.1 times longer than wide, apex globular and slightly curved inwards, inner side slightly tumid, apical cavity small without microtrichia, remaining inner side scattered with microtrichia, one spine and one whip-lash hair present. Tegmen of the typical ground plan of the Psl. jejuna complex, onion-shaped but elongated; dorsal folds present; parameral apodemes basally strongly sclerotized, medially connected, distal branches close and nearly parallel. Area of teeth absent. Ejaculatory apodeme pale, narrow and long, proximal end slightly thickened and slightly darkened; base of ejaculatory apodeme delicate, narrow and long. Posterior portion of gonocoxal apodeme medium sized and brown, joined medially. Anterior portion of gonocoxal apodeme long and dark brown, nearly reaching the proximal end of the hypopygium.

Body size: 2.3–2.8 mm.

Female. Unknown.

Genetic distances. The maximum p-distance between all 19 available COI sequences is 1.37%. The nearest neighbour is Psl. whena , diverging by a minimum of 5.02%. All five available 28S sequences are identical and do not show differences to sequences of Psl. porotaka and Psl. whena . One of those sequences is also identical to the sequence of Psl. whakahara . The reason for this is that both sequences are fragmentary and only share a middle part of about 480 bp in the alignment.

Etymology. The new species is named after the phylogenetic biologist Prof. Dr Walter Sudhaus.

Distribution. New Zealand.

Discussion. Pseudolycoriella sudhausi and the species Psl. nahenahe, Psl. whena , and Psl. porotaka have in common a much narrower ejaculatory apodeme than the remaining species of the Psl. jejuna complex. Of these species, Psl. sudhausi and Psl. whena have a width/length ratio of the fourth flagellomere greater than 2.8. Pseudolycoriella sudhausi can be distinguished from Psl. whena by the wing length (2.2–2.8 mm vs. 1.9–2.1 mm, respectively). The body size also differs, but shows a small range of overlap at 2.3 mm. Pseudolycoriella whena has a comparatively smaller tegmen, a shorter gonostylus, and a shorter anterior portion of gonocoxal apodeme than Psl. sudhausi .

Figures

FIGURES 37–42. Pseudolycoriella jejuna complex, hypopygia. 37. Pseudolycoriella sudhausi sp. n. 38. Pseudolycoriella whena sp. n. 39. Pseudolycoriella porotaka sp. n. 40. Pseudolycoriella nahenahe sp. n. 41. Pseudolycoriella raki sp. n. 42. Pseudolycoriella dagae sp. n. Abbreviation: ba = basal angle.