Waipapamyia Jaschhof & Kallweit

Jaschhof, Mathias & Kallweit, Uwe, 2009, The Cycloneura Marshall group of genera in New Zealand (Diptera: Mycetophilidae: Leiini), Zootaxa 2090, pp. 1-39 : 31-32

Genus Waipapamyia Jaschhof & Kallweit gen. n.

Type species. Waipapamyia dentata sp. n., hereby designated.

Diagnosis. This is the only leiine genus, in New Zealand and elsewhere, with the combination of a sinuous CuA2 and two short crossveins (Rs and R4) between R1 and R5 ( Fig. 23 ). The top of the head is rounded and situated above the level of the ventral margin of the mesonotum ( Figs 10 , 35 ). The lateral ocelli are far from the eye margins ( Fig. 29 ). Postocular bristles are present ( Fig. 29 ). The scutum is rounded anteriorly ( Fig. 35 ). The mediotergite is angled ( Fig. 35 ). Sc is long and ends in C; the tines of the M-fork diverge towards the wing apex, M2 is detached basally; CuA2 is sinuous; and A1 is not in touch with CuA2 ( Fig. 23 ). Outline of the male terminalia is uniform and distinctive, including the genus-specific combination of the following characters. The long gonocoxites have a very deep V-shaped ventral emargination ( Fig. 90 ); the gonostylus is equipped with an apical spine and abundant macrosetae of various sizes and in species-specific arrangements ( Figs 90, 91 ); and tergite 9 bears 2 very large apical setae projecting ventrally ( Fig. 92 ). The closest relatives of Waipapamyia remain obscure for the time being.

Description. Color. Thorax and abdomen brown, legs light. Head. Head capsule in lateral view higher than long, rounded on top. Foramen situated above midheight of head. Median convexity of postgenae not sclerotized. Frons asetose. Frontal furrow complete. Frontal tubercle 2-pointed. Antennae inserted at midheight of head. Scape little longer than pedicel, both setose. Fourteen flagellomeres; four proximal flagellomeres slightly compressed, others subcylindrical, with very short stalks; nodes longer than wide, in males longer than in females; covered densely with trichia of which the bases form polygon-like patterns, longest trichia little shorter than width of node; each flagellomere usually with 1–3 short setae distally; apical flagellomeres of females with 2, those of males without apical setae. Numerous fine interommatidial setulae. Three ocelli in wide triangle on top of head; median ocellus little smaller than laterals, the latter far from eye margins (the distance equates about 3 times the ocellus width). Postocular bristles 8–10 in row. Face setose, dorsal margin subtriangular. Clypeus smaller than face, setose. Labrum elongate subtriangular, asetose. Stipes strongly setose. Lacinia absent. Maxillary palpus long, 4-segmented; one segment proximally of presumed third; basalmost segment weak, asetose; third segment strongly swollen, with innumerable translucent sensilla on dorsomesal surface; apical segment long, slender. Prementum weak, asetose. Premental apodemes fused mesally, with 2 posterior processes. Labellum enlarged, with large lateral setae and large prestomal teeth in long mesal row.

Thorax. Comparatively high, scutum index 2.79, episternum index 1.00. Postpronotum asetose. Suture between antepronotum and proepisternum incomplete posteriorly; both sclerites with setae and bristles. Proepimeron situated posteroventrally of proepisternum, long and truncate, fitting into notch of preepisternum 2. Basisternum 1 asetose. Anepisternum smaller than preepisternum 2, with weak suture between, both sclerites asetose like all other pleura. Preepisternum 2 covering basalmost portion of mid coxa. Anepimeron large; ventral portion narrow, occupying a space between preepisternum 2 and laterotergite. Mid-pleural pit poorly developed. Laterotergite ovate, bulging, darker than pleura. Scutum rounded, not protruding anteriorly, with evenly distributed lateral setae intermingled with bristles. Anterior parapsidal suture indistinct. Prescutum not traceable. Scutellum with setae and 2 lateral bristles. Mediotergite protruding, sharply arched. Wing. Long, wing index 2.8. Membrane with brown tinge and dark markings above M; with microtrichia on both sites and some posterior setae. Calypterous lobe developed, with setose margin. Dmp asetose. Anal lobe very slightly angled. C extending much beyond apex of R5 and almost to wing apex. Sc weak, long, ending in C. Two crossveins (Rs and R4) between R1 and R 5 in far distance from one another, Rs situated in proximal half of wing, R 4 in distal half of wing. R1 much longer than ta, ending in distal half of wing. Apical portion of R5 approaching C. M 2-branched; M1 and M2 evenly diverging towards wing apex; M2 reaching wing margin or not, detached basally; M-stem shorter than fork. CuA1 long, evanescent basally. CuA2 sinuous. A1 long, fading out before reaching CuA2, straight or curved posteriorly. CuP present as distinct fold. A2 absent. Dorsal setae on all veins except h, Sc, Rs, R4, tb, and CuP. Distal section of R1 with some ventral setae. Legs. Hind margin of hind coxa slightly protruding. Tibial and tarsal trichia irregularly arranged. Fore tibia shorter than femur, with very short, irregularly arranged setae. Fore tibial organ with semicircular rim, with numerous pale trichia of which the distalmost form a comb. Mid tibia with 3 rows of setae, hind tibia with 2 rows, longest setae little longer than tibial diameter. Hind tibial apical comb of pale setae absent. Tibial spurs 1:2:2, with serrated rims, on mid and hind tibiae unequal in length. Empodia narrow, shorter than pretarsal claws. Pulvilli not traceable. Claws with 1 large and 2 small teeth.

Abdomen. Setose except sternite 1. Male segments 6–8 very short, telescoped. Light, weakly pigmented lateral lines (folds?) present on male tergites 2–6 and sternites 3–6, and on female tergites and sternites 2–6.

Male terminalia. Large, not rotated. Sternite 9 not traceable. Tergite 9 subtriangular, broadly merged with gonocoxites, with dorsal setae of various sizes and 2 very large apical setae directed ventrally. Gonocoxites long, capsule-like, almost separate ventromesally, with 1 very large seta each ventromesally and dorsosubapically. PostGA very short. AntGA long, thin, largely unsclerotized. Gonostylus flattened, its mesal surface excavated, with apical spine, 2 sabre-like macrosetae ventromesally and 7–8 long pointed macrosetae dorsomesally. Aedeagus, ejaculatory apodeme and parameres forming complex structure of variable outline. Hypoproct very weak, with 2 setae. Cerci merged mesally, setose. Female terminalia. Tergites 8 and 9 moderately long, setose. Gonocoxite 8 rounded apically, with some very large apical setae. Gonapophysis 8 very large. Gonapophyses 9 sclerotized, merged to form common internal structure. Tergite 10 very short, merged with sternite 10, both setose. Cercus setose, basicercus longer than disticercus.

Etymology. The name is composed of Waipapa, the locality where most specimens were collected, and - myia, the Greek word for fly or gnat. Gender is feminine.

Figures

FIGURES 19 – 25. Wings. 19: Paracycloneura apicalis Tonnoir, ventral view. 20: Paracycloneura inopinata sp. n., ventral view. 21: Tonnwardsia gen. et sp. n., ventral view. 22: Cawthronia nigra Tonnoir, ventral view. 23: Waipapamyia dentata sp. n., dorsal view. 24: Waipapamyia elongata sp. n., ventral view. 25: Waipapamyia truncata sp. n., ventral view.

FIGURES 9 – 12. Specimens in lateral view. 9: Cawthronia nigra Tonnoir, female. 10: Waipapamyia dentata sp. n., female. 11: Cycloneura sp., male. 12: Cycloneura sp., female.

FIGURES 34 – 37. Thorax, lateral view. 34: Sigmoleia similis sp. n. 35: Waipapamyia dentata sp. n. 36: Cawthronia nigra Tonnoir. 37: Cycloneura Marshall sp. Length of scale bar = 0.5 mm.

FIGURES 26 – 29. Head in frontal view. 26: Paradoxa fusca Marshall. 27: Sigmoleia peterjohnsi sp. n. 28: Cawthronia nigra Tonnoir. 29: Waipapamyia dentata sp. n. Length of scale bar = 0.1 mm.

FIGURES 90 – 96. Waipapamyia dentata sp. n. 90: Male terminalia, ventral view. 91: Gonostylus, mesal view. 92: Gonocoxites and tergite 9, dorsal view. 93: Aedeagus / paramere complex, ventral view. 94: Male flagellomere 4, lateral view. 95: Male flagellomeres 1 – 5, lateral view. 96: Female flagellomeres 1 – 5, lateral view. Length of scale bar = 0.05 mm (for 94) and 0.1 mm (for 90 – 93, 95 – 96).