Allodia mazumbaiensis Magnussen, 2018

Magnussen, Trude, Kjaerandsen, Jostein, Johnsen, Arild & Søli, Geir E. E., 2018, Six new species of Afrotropical Allodia (Diptera: Mycetophilidae): DNA barcodes indicate recent diversification with a single origin, Zootaxa 4407 (3), pp. 301-320 : 307-308

Allodia mazumbaiensis Magnussen sp. nov.

( Fig. 3 )

Diagnostic characters. A. mazumbaiensis can best be separated from the other species described here, based on the following combination of characters: Rm as long as stem of the posterior fork; the dorsal lobe of the gonostylus have a small inconspicuous area at apex, as in A. nyeriensis , A. drakensbergensis and A. keurbosensis ; the median lobe is narrower than in the other species, with fewer setae on the ventral margin and one especially long and pronounced on the dorsal tip ( Fig. 10 ); basal part of gonostylus differs from all the other species ( Fig. 3C ).

Type material. Holotype ♂. Tanzania: Tanga region, West Usambara mountains, Mazumbai, 1500 masl. Malaise trap, loc. O., ZBM’s Tanzania expedition. 29 Sep. –3 Des. 1990. Leg. G. Søli. ( NHMO).

Measurements. Male: Body length 4.44 mm; wing length 3.33 mm.

Coloration. Head and clypeus brown. Mouthparts and palpomeres whitish yellow. Antennae brown, with scape, pedicel and first half of first flagellomere whitish yellow. Scutum brown, with yellow lateral margin. Antepronotum whitish, lateral sclerites otherwise brown. Wings clear without markings. Halteres whitish yellow. Legs whitish, with brown basal area ventral on femur. Abdomen brown, tergites 2–4 with lateral area whitish yellow. Terminalia yellow.

Head. Two ocelli, located close to eye margin. Head covered with fine trichia, except for row of 5 short bristles near eye margin, above ocellus. Antennae about twice as long as thorax. Scape and pedicel with several setae on distal third. Flagellomeres cylindrical, densely clothed with fine trichia. First flagellomere twice as long as scape.

Thorax. Antepronotum with 5 strong setae. Scutum covered with uniform small, pale setae, with strong lateral prealar and postalar setae. Discal bristles absent. Scutellum with 2 strong bristles. Laterotergite with 2 long and 4 minute setae. Other lateral sclerites bare.

Legs. Fore-, mid and hind tibia with short setae arranged in rows. Mid tibia with 14 anterodorsal and 26 posterodorsal bristles, on distal 3/4 of segment. Hind tibia with 8 anterodorsal and 9 posterodorsal bristles.

Wings. Sc short, ending in R, length of rm equal to stem of posterior fork, base of anterior fork slightly before base of posterior fork. R1 and R5 with setae.

Male terminalia ( Fig. 3 ). Tergite 9 medially divided, each part rounded, covered with minute trichia, with two strong apical bristles and three long setae. Cerci clothed with fine trichia, with longer setae apically; pseudocerci with several long setae ( Fig. 3A ). Dorsal lobe of gonostylus oblong, apex rounded with small, inconspicuous, membranous area internally; outer surface with numerous strong setae. Median lobe slender, ventral side straight; with 4 strong and 4 thin setae on posterior margin, apical seta especially prominent; 2-3 small setae on lobe surface; one long seta on ventral side, located with approximately equal distance from tip and basis of lobe. Ventral lobe slender, slightly arched, with 5-6 setae apically. Basal part of gonostylus with two structures of equal size, both bulbous with 5-6 setae ( Fig. 3C ). Hypandrial lobe complex, elongated, curved inwards ( Fig. 3A )

Etymology. Named after the type locality.

Remarks. The specimen has become pale after years of storage in glycerol. Measurements were made on specimen in ethanol.

Figures

FIGURE 3. THe MALe TeRMINALIA OF A. mazumbaiensis. A, LeFT:DORSAL VIeW, RIGHT:VeNTRAL VIeW; B, GONOSTYLUS FROM INNeR SIDe; C, BASAL PART OF GONOSTYLUS.SCALe bAR = 1µM.

FIGURE10. VARIATION beTWeeN AFROTROPICAL Allodia, GONOSTYLUS FROM INNeR SIDe.A, A.nyeriensis; B, A.mazumbaiensis; C, A. drakensbergensis; D, A.keurbosensis; E, A.jaschhofi; F, A. karkloofensis. SCALe bAR = 1µM.