Lygistorrhina (Probolaeus) mitarakensis, Blagoderov & Pollet, 2020

Blagoderov, Vladimir & Pollet, Marc, 2020, Diversity of Lygistorrhina (Probolaeus) Williston, 1896 (Diptera: Keroplatidae, Lygistorrhininae) of Mitaraka (French Guiana), with descriptions of three new species, Zoosystema 42 (30), pp. 593-606 : 598-600

Lygistorrhina (Probolaeus) mitarakensis n. sp.

( Figs 1C , 2C , 3E, F , 4E, F , Table 1 )

urn:lsid:zoobank.org:act:20F21808-86A0-4AB8-A10A-75050FD763C9

TYPE MATERIAL. — Holotype. French Guiana • ♂; Mitaraka , different sites nr base camp and along trails; tropical most forest (different sites); 14.III.2015; Julien Touroult & Eddy Poirier leg.; SLAM; MITARAKA/191; mounted in Euparal on slide; MNHN-ED-ED10691 ; MNHN.

Paratypes. French Guiana • 26 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 14.III.2015; Julien Touroult & Eddy Poirier leg.; SLAM; MITARAKA/191; in alcohol; MNHN-ED-ED10694 mounted in DMHF on slide;MNHN-ED-ED10691, ED10692, ED10693, ED10694, ED10695, ED10696, ED10697, ED10698, ED10699, ED10700, ED10701, ED10702, ED10703, ED10704, ED10705, ED10706, ED10707, ED10708, ED10709, ED10710, ED10711, ED10712, ED10713, ED10714, ED10715, ED10716, ED10722; MNHN • 1 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 1-6.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/195; in alcohol; MNHN-ED-ED10717; MNHN • 1 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 25.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/190; in alcohol;MNHN-ED-ED10718; MNHN • 2 ♂; MIT-DZ2 (tropical moist forest, plateau-slope); 02°14’02.6”N, 54°27’01.7”W; 296 m; 20-25.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/206; in alcohol; MNHN-ED-ED10719, MNHN-ED-ED10721; MNHN • 1♂; MIT-DZ1 (tropical moist forest, plateau-slope); 02°14’01.4”N, 54°27’00.2”W; 304 m; 1-8.III.2015; SLAM; leg. Marc Pollet; MITARAKA/169; in alcohol; MNHN-ED-ED10720; MNHN • 2♂; MIT-DZ2 (tropical moist forest, plateau-slope); 02°14’02.6”N, 54°27’01.7”W; 296 m; 1-8.III.2015; SLAM; leg. Marc Pollet; MITARAKA/173; in alcohol; NMS-10003798, NMS-10003799; NMS • 1 ♂; MIT-E-savane roche 2 (open/partially opened areas); 02°13’59.8”N, 54°27’46.5”W; 471 m; 13-20.VIII.2015; MT(6 m); leg. Pierre-Henri Dalens; MITARAKA/230; in alcohol; NMS-10003800; NMS • 3 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 14.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/191; in alcohol; NMS-10003801-NMS-10003803; NMS .

DIAGNOSIS. — Antenna entirely yellow, flagellomeres each with one prominent dorsal seta. Wing hyaline; Sc ends at C. Thorax, mid and hind coxa brown; fore coxa yellow. Abdominal segment 1 completely pale-yellow; segments 2-5 with a pale-yellow posterior band; gonostyli of subequal width along their entire course; aedeagus membranous.

ETYMOLOGY. — The species epithet refers to the type locality.

DESCRIPTION

Male

General coloration. Dark brown ( Fig. 1C ).

Measurements. See Table 1 .

Head. Rounded, dichoptic. Eyes appear larger than head height, with vertex appearing slightly depressed. Rounded ommatidia with similar diameter, interocular setae subequal in length to ommatidial diameter.Three ocelli arranged almost on a straight line, semi-circular, with median ocellus 1/3× the size of lateral ocelli. Antenna yellow, strongly tapering, shorter than hind femur, with length 0.8-0.9 mm; 14 flagellomeres, each with one strong dorsal seta, subcylindrical, gradually tapering; flagellomeres 1-9 1.5-2× as long as wide, flagellomeres 10-14 2-4× as long as wide. Face longer than wide. Clypeus with rounded apex, setose.Palpus length 1.2 mm, tapering towards apex, with a simple row of very long setae (at least 5× as long as palpus width). Hypopharynx length 1.5mm; labellum slightly longer. Thorax. Thorax completely brown. Scutum irregularly setose. Scutellum rounded, with 6 posterior setae. Antepronotum and proepisternum with 4-5 setae each. Laterotergite lobed, with one row of 14-20 setae. Hind coxa slightly longer than both metepimeron and laterotergite.

Legs. Fore coxa pale-yellow; mid and hind coxa completely dark brown. Remainder of fore and mid legs yellow; hind femur pale-yellow basally, dark brown in distal 1/3; hind tibia brown in distal 1/4; hind tarsus entirely brown. Tibiae irregularly setose. Dorsal setae of hind tibia longer than tibial width. Fore basitarsus 1 shorter than fore tibia. Claws of fore and mid leg curved, apically blunt, with a small incision at apex; claw of hind legs setiform, straight and pointed.

Wing ( Fig. 1C ). Membrane hyaline, densely covered with microtrichia.Sc relatively long, ending on C; R 1 slightly proximad the level of CuA tip; C extending to half the distance between tips of R 5 and M 1; C, R 1 and R 5 with dark setae, rest of the veins bare; M 1 longer than M 2 and M 3+4, latter subequal in length. M 1 and M 2 almost straight; M 3+4 curved anteriorly and slightly sinuous; CuA curved posteriorly, sometimes inconspicuously sinusoid. Anal lobe well developed. Halter yellow, with the same length as first abdominal segment.

Abdomen. Mainly dark brown. Segment 1 completely pale; segments 2-5 with pale-yellow posterior band, occupying 20-30% of segment length; segments 6 and 7 and terminalia dark brown (sometimes sternite 6 with inconspicuous pale apical spot).

Terminalia ( Figs 3E, F ; 4E, F ). Tergite 9 rounded at base, somewhat triangular at tip, with very long setae near apex (longer than on remainder of tergite) and a patch of sparse short setae at tip. Sternite 9 with rectangular base wider than long and square extension caudally. Gonostyli of equal width, with very dense apical and medioventral patch of setae at tip; apical tooth scoop-shaped. Aedeagal complex membranous, bell-shaped with short parallel-sided apex; gonocoxal apodemes heavily sclerotised distally; aedeagal apodeme sinusoidally curved.

COMPARISON

The new species is most similar to L. singularis ( Williston, 1896) but differs by (character status in L. singularis given in brackets): flagellomeres longer (0.7-1.3× as long as wide); Costa shorter, not extending half the distance between R 5 and M 1 (extending); M 3+4 curved anteriorly (posteriorly); fore basitarsus shorter than fore tibia (longer); abdominal segment 5 with pale apical band (completely brown).

Figures

FIG. 1. — Habitus of new species of Lygistorrhina (Probolaeus) Williston,1896:A, Lygistorrhina maculipennis n. sp., with detached head in separate box; paratype MHNH-ED-ED10673; B, Lygistorrhina conica n. sp., paratype NMS-10003795; C, Lygistorrhina mitarakensis n. sp., paratype NMS-10003799. Scale bar: 1 mm.

FIG. 2. — Wings of new species of Lygistorrhina (Probolaeus) Williston, 1896. A, Lygistorrhina maculipennis n. sp.,holotype MNHN-ED-ED10672; B, Lygistorrhina conica n. sp.,paratype MNHN-ED-ED10681; C, Lygistorrhina mitarakensis n. sp., holotype MNHN-ED-ED10691. Scale bar: 0.2 mm.

FIG. 3. — Male genitalia of new species of Lygistorrhina (Probolaeus) Williston, 1896: A, B, Lygistorrhina maculipennis n. sp., holotype MNHN-ED-ED10672; C, D, Lygistorrhina conica n. sp., holotype MNHN-ED-ED10674; E, F, Lygistorrhina mitarakensis n. sp., MNHN-ED-ED10691; A, C, E, dorsal view; B, D, F, ventral view. Scale bar: 50 µm.

FIG. 4. — Aedeagal complex of new species of Lygistorrhina (Probolaeus) Williston, 1896: A, B, Lygistorrhina maculipennis n. sp., holotype MNHN-ED-ED10672; C, D, Lygistorrhina conica n. sp., holotype MNHN-ED-ED10674; E, F, Lygistorrhina mitarakensis n. sp., holotype MNHN-ED-ED10691; A, C, E, dorsal view; B, D, F, ventral view. Scale bar: 20 µm.