Lygistorrhina (Probolaeus) conica, Blagoderov & Pollet, 2020Lygistorrhina (Probolaeus) mitarakensis, Blagoderov & Pollet, 2020Lygistorrhina (Probolaeus) cerqueirai Lane, 1958Lygistorrhina (Probolaeus) urichi Edwards, 1912

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: 596-603

publication ID

http://doi.org/ 10.5252/zoosystema2020v42a30

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:5A4A8B27-2249-4EB6-8BF6-DEAD26E4A2F9

DOI

http://doi.org/10.5281/zenodo.4330176

persistent identifier

http://treatment.plazi.org/id/20F21808-86A0-4AB8-A10A-75050FD763C9

taxon LSID

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

treatment provided by

Felipe

scientific name

Lygistorrhina (Probolaeus) conica Lygistorrhina (Probolaeus) mitarakensis Lygistorrhina (Probolaeus) cerqueirai Lane, 1958 Lygistorrhina (Probolaeus) urichi Edwards, 1912
status

n. sp.

Lygistorrhina (Probolaeus) conica   n. sp.

( Figs 1B View FIG , 2B View FIG , 3C, D View FIG , 4C, D View FIG , Table 1 View TABLE )

urn:lsid:zoobank.org:act:3A3A4894-D715-43A2-AE6E-D6F880982428

TYPE MATERIAL. — Holotype. French Guiana • ♂; Mitaraka , different sites nr base camp and along trails, tropical moist forest (different sites); 14.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/191; mounted in Euparal on slide; MNHN-ED-ED10674; MNHN.  

Paratypes. French Guiana • 6 ♂; same data as holotype; in alcohol; MNHN-ED-ED10675, MNHN-ED-ED10676, MNHN-ED-ED 10677, MNHN-ED-ED10678, MNHN-ED-ED10679, MNHN-ED-ED10680; MNHN   4 ♂; nr MIT-A-RBF1 (river); 24.III.2015; MT(6 m); Julien Touroult & Eddy Poirier leg.; MITARAKA/193; in alcohol (genitalia of one 1♂ mounted in DMHF); MNHN-ED-ED10681, MNHN-ED-ED10682, MNHN-ED-ED10683, MNHN-ED-ED10684; MNHN   1♂; MIT-C-RBF2 (tropical wet forest, bas fond); 02°14’03.4”N, 54°26’53.0”W; 299 m; 2-10.III.2015; SLAM; leg. Marc Pollet; MITARAKA/138; in alcohol; MNHN-ED-ED10685; MNHN GoogleMaps   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-ED10686; MNHN   1 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 1.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/194; in alcohol; MNHN-ED-ED10687; MNHN   3 ♂; 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; MNHN-ED-ED10688, MNHN-ED-ED10689, MNHN-ED-ED10690; MNHN GoogleMaps   1 ♂; 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-10003794; NMS   1 ♂; nr MIT-A-RBF1 (river); 24.III.2015; MT(6 m); Julien Touroult & Eddy Poirierleg.; MITARAKA/193; in alcohol; NMS-10003795; NMS   1 ♂; nr MIT-A-RBF1 (river); 25.III.2015; MT(6 m); Julien Touroult & Eddy Poirier leg.; MITARAKA/189; in alcohol; NMS-10003796; 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); Pierre-Henri Dalens leg.; MITARAKA/230; in alcohol; NMS-10003797; NMS GoogleMaps   .

DIAGNOSIS. — Small dark fly. Wing hyaline, Sc ends at C, C extends beyond ½ distance between R 5 and M 1; M 1 sinuous. Tergite 1 brown, abdominal segments 2-4 with pale apical fringe. Tergite 9 ovoid, with very dense patch of equal spines concentrated on apex; gonostyli tapering, with dense patch of apical setae as long as apical tooth.

ETYMOLOGY. — The species epithet refers to the shape of its aedeagal complex, and should be considered as an adjective.

DESCRIPTION

Male

General coloration. Dark brown ( Fig. 1B View FIG ).

Measurements. See Table 1 View TABLE .

Head. Rounded, dichoptic. Vertex slightly convex. Rounded ommatidia with similar diameter, interocular setae length subequal to ommatidium diameter. Three ocelli arranged on a straight line, with median ocellus round, half the diameter of lateral ocelli, and two semi-circular lateral ocelli, directed laterally. Antenna light brown at the basis, gradually becoming yellow towards apex ( Fig. 1B View FIG ); 14 flagellomeres, with strong dorsal setae (flagellomeres 1-3 with several irregular setae, and flagellomeres 4-13 with one pair), subcylindrical, gradually tapering, about 2× as long as wide. Face longer than wide. Clypeus rounded apically. Palpus length 0.9 mm, tapering towards apex, with a simple row of long setae. Hypopharynx length 1.3-1.5 mm; labellum slightly longer.

Thorax. Thorax brown. Scutum irregularly setose. Scutellum rounded, with 6-8 posterior setae. Antepronotum and proepisternum with 4-5 setae each. Laterotergite lobed, with a row of 10-14 setae. Hind coxa slightly longer than either metepimeron or laterotergite.

Legs. Fore coxa pale-yellow; mid and hind coxa completely dark brown. Remainder of fore and mid legs entirely yellow; hind femur pale-yellow basally, dark brown in distal 1/2; hind tibia light brown basally, dark brown in distal 1/2; hind tarsus entirely brown.Tibiae irregularly setose. Dorsal setae of hind tibia shorter than tibial width. Claws of fore and mid legs curved, apically blunt, with a small incision at apex; claw of hind leg setiform, straight and pointed.

Wing ( Fig. 2B View FIG ). Membrane hyaline, densely covered with microtrichia; slightly darker at the tip posterior of R 5. Sc short, ending on C; R 1 slightly proximad the level of CuA tip; C extending to more than half the distance between tips of R 5 and M 1; C, R 1 and R 5 with dark setae, remaining veins bare; M 1, M 2, and M 3+4 approximately equal in length. M 1 bent anteriorly, sinuous, M 2 almost straight, M 3+4 and CuA curved posteriorly. Anal lobe well developed. Halter yellow, as long as first abdominal segment.

Abdomen. Dark brown. Sternite 1 in some specimens with pale transversal posterior band; segments 2-4 with pale-yellow posterior band, occupying 20-25% of segment length; segments 5-7 and terminalia dark brown.

Terminalia ( Figs 3C, D View FIG ; 4C, D View FIG ). Tergite 9 slightly ovoid, with very dense patch of spines of equal length concentrated on apex. Gonostyli tapering, as long as apical tooth, with dense patch of apical setae. Aedeagal complex heavily sclerotised, conical, with rounded apex. Aedeagal apodemes long, straight, unbranched, directed medially.

COMPARISON

Although similar in coloration to L. borkenti   , L. conica   n. sp. differs from this species by the following features (character status in L. borkenti   given in brackets):its smaller size ( Table 1 View TABLE ); a very light infuscate wing apex, occupying area between R 5 and M 1 (distinct spot); M 1 sinuous (curved posteriorly); fore coxa yellow except its very base (completely brown); aedeagus sclerotised, tapering, almost triangular (membranous, rounded).

Lygistorrhina (Probolaeus) mitarakensis   n. sp.

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

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 GoogleMaps   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 GoogleMaps   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 GoogleMaps   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 GoogleMaps   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 View FIG ).

Measurements. See Table 1 View TABLE .

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 View FIG ). 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 View FIG ; 4E, F View FIG ). 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).

Lygistorrhina (Probolaeus) cerqueirai Lane, 1958  

( Fig. 5 View FIG )

Lygistorrhina cerqueirai Lane, 1958: 209   .

REMARK

The species was described by J. Lane based on a single male specimen. During the senior author’s visit to MZUSP in 2010, the holotype of the species was studied and photographed. Below is an emended description.

MATERIAL EXAMINED. — Holotype. Brazil • ♂; Amazonas, Igarapé de Mariano ; 21.XI.1955; Elias and Rappe coll.; MZUSP.  

EMENDED DESCRIPTION

Male

Head. Palpus ¾× as long as proboscis, rather densely setose; setae about as long as proboscis width. Median ocellus slightly anteriad of lateral ocelli, half the diameter of the latter; lateral ocelli semicircular. Flagellomeres bacilliform, about 3× as long as wide, each with single prominent dark seta near apex.

Thorax ( Fig. 5C, D View FIG ). Laterotergite with 16-17 setae; mediotergite with 6 setae; antepronotum with 5 setae; proepisternum with 6 setae. Mesonotum with short setae forming indistinct dorsocentral and acrostichal rows; with long setae in supra-alar rows and in posterior quarter of mesonotum.

Wing ( Fig. 5B View FIG ). Costa extends beyond R 5 to more than ½ of distance between R 5 and M 1; M 1 and CuA sinuous.

Terminalia ( Fig. 5E, F View FIG ). Tergite 9 ovoid, entirely setose, with dense patch of strong spines on apex. Gonostyli parallelsided, slightly curved inwards, with an apical scoop-shaped tooth. Gonocoxal apodemes heavily sclerotised.

Lygistorrhina (Probolaeus) urichi Edwards, 1912  

( Figs 6 View FIG , 7 View FIG )

Lygistorrhina urichi Edwards, 1912: 204   .

REMARK

The species was described by F. W. Edwards based on a series of 8 specimens (7 males and one female), collected by H. Scott (Cambridge, UK). While the original paper specifies that the type was presented to the British Museum (now Natural History Museum, NHMUK, London), one male and one female specimen were located in this collection. Five male specimens were deposited in the collection of the Museum of Zoology, Cambridge University ( UK). Edwards did not specify the gender of the type specimens deposited in the NHMUK, so the entire type series should be considered as syntypes. Discovery of additional syntypes allows us to emend Edward’s description (only additional or misinterpreted characters being mentioned).

MATERIAL EXAMINED. — Syntypes. Trinidad • 1♂; Diego Martin ; 22.III.1912; H. Scott, herbage by stream; BMNH(E)254352; NHMUK   1 ♀; III.1912, H. Scott; BMNH(E)254351; NHMUK   2 ♂; III.1912, H. Scott; CUMZ   .

EMENDED DESCRIPTION

Male

Head. Scape and pedicel brown, flagellum uniformly pale, as long as thorax; flagellomeres as long as wide or slightly shorter, each with a few irregular dark dorsal setae. Median ocellus round, ½× the diameter of the lateral ocelli, latter semi-circular.

Thorax. Thorax and coxae uniformly dark brown. Antepronotum with three setae, proepisternum with six setae.Laterotergite with 18-19 setae, and mediotergite with 6-8 setae; laterotergite, metepisternum and hind coxa subequal in size. Mesonotum irregularly setose except for posterior 1/3, latter with indistinct dorsocentral rows of setae.

Wing. M 1 straight; M 2 and M 3+4 curved and converging; M 3+4 slightly and CuA conspicuously sinuous.

Abdomen. Tergite 1 of some specimens completely dark, but sternite 1 always with pale transversal posterior band.

Terminalia ( Fig. View FIG 7). Male genitalia narrower than in other species. Tergite 9 oval, almost parallel-sided, 1.5× as long as wide. Gonostyli appearing laterally flattened, slightly wider at apex; apical tooth scoop-shaped, with very dense patch of setae apico-medially. Aedeagus wider than long, bell-shaped, with flat apex; aedeagal apodeme long, curved; gonocoxal apodeme heavily sclerotised.

Lygistorrhina (Probolaeus) mitarakensis   n. sp.

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

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 GoogleMaps   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 GoogleMaps   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 GoogleMaps   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 GoogleMaps   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 View FIG ).

Measurements. See Table 1 View TABLE .

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 View FIG ). 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 View FIG ; 4E, F View FIG ). 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).

Lygistorrhina (Probolaeus) cerqueirai Lane, 1958  

( Fig. 5 View FIG )

Lygistorrhina cerqueirai Lane, 1958: 209   .

REMARK

The species was described by J. Lane based on a single male specimen. During the senior author’s visit to MZUSP in 2010, the holotype of the species was studied and photographed. Below is an emended description.

MATERIAL EXAMINED. — Holotype. Brazil • ♂; Amazonas, Igarapé de Mariano ; 21.XI.1955; Elias and Rappe coll.; MZUSP.  

EMENDED DESCRIPTION

Male

Head. Palpus ¾× as long as proboscis, rather densely setose; setae about as long as proboscis width. Median ocellus slightly anteriad of lateral ocelli, half the diameter of the latter; lateral ocelli semicircular. Flagellomeres bacilliform, about 3× as long as wide, each with single prominent dark seta near apex.

Thorax ( Fig. 5C, D View FIG ). Laterotergite with 16-17 setae; mediotergite with 6 setae; antepronotum with 5 setae; proepisternum with 6 setae. Mesonotum with short setae forming indistinct dorsocentral and acrostichal rows; with long setae in supra-alar rows and in posterior quarter of mesonotum.

Wing ( Fig. 5B View FIG ). Costa extends beyond R 5 to more than ½ of distance between R 5 and M 1; M 1 and CuA sinuous.

Terminalia ( Fig. 5E, F View FIG ). Tergite 9 ovoid, entirely setose, with dense patch of strong spines on apex. Gonostyli parallelsided, slightly curved inwards, with an apical scoop-shaped tooth. Gonocoxal apodemes heavily sclerotised.

Lygistorrhina (Probolaeus) urichi Edwards, 1912  

( Figs 6 View FIG , 7 View FIG )

Lygistorrhina urichi Edwards, 1912: 204   .

REMARK

The species was described by F. W. Edwards based on a series of 8 specimens (7 males and one female), collected by H. Scott (Cambridge, UK). While the original paper specifies that the type was presented to the British Museum (now Natural History Museum, NHMUK, London), one male and one female specimen were located in this collection. Five male specimens were deposited in the collection of the Museum of Zoology, Cambridge University ( UK). Edwards did not specify the gender of the type specimens deposited in the NHMUK, so the entire type series should be considered as syntypes. Discovery of additional syntypes allows us to emend Edward’s description (only additional or misinterpreted characters being mentioned).

MATERIAL EXAMINED. — Syntypes. Trinidad • 1♂; Diego Martin ; 22.III.1912; H. Scott, herbage by stream; BMNH(E)254352; NHMUK   1 ♀; III.1912, H. Scott; BMNH(E)254351; NHMUK   2 ♂; III.1912, H. Scott; CUMZ   .

EMENDED DESCRIPTION

Male

Head. Scape and pedicel brown, flagellum uniformly pale, as long as thorax; flagellomeres as long as wide or slightly shorter, each with a few irregular dark dorsal setae. Median ocellus round, ½× the diameter of the lateral ocelli, latter semi-circular.

Thorax. Thorax and coxae uniformly dark brown. Antepronotum with three setae, proepisternum with six setae.Laterotergite with 18-19 setae, and mediotergite with 6-8 setae; laterotergite, metepisternum and hind coxa subequal in size. Mesonotum irregularly setose except for posterior 1/3, latter with indistinct dorsocentral rows of setae.

Wing. M 1 straight; M 2 and M 3+4 curved and converging; M 3+4 slightly and CuA conspicuously sinuous.

Abdomen. Tergite 1 of some specimens completely dark, but sternite 1 always with pale transversal posterior band.

Terminalia ( Fig. View FIG 7). Male genitalia narrower than in other species. Tergite 9 oval, almost parallel-sided, 1.5× as long as wide. Gonostyli appearing laterally flattened, slightly wider at apex; apical tooth scoop-shaped, with very dense patch of setae apico-medially. Aedeagus wider than long, bell-shaped, with flat apex; aedeagal apodeme long, curved; gonocoxal apodeme heavily sclerotised.

Lygistorrhina (Probolaeus) cerqueirai Lane, 1958  

( Fig. 5 View FIG )

Lygistorrhina cerqueirai Lane, 1958: 209   .

REMARK

The species was described by J. Lane based on a single male specimen. During the senior author’s visit to MZUSP in 2010, the holotype of the species was studied and photographed. Below is an emended description.

MATERIAL EXAMINED. — Holotype. Brazil • ♂; Amazonas, Igarapé de Mariano ; 21.XI.1955; Elias and Rappe coll.; MZUSP.  

EMENDED DESCRIPTION

Male

Head. Palpus ¾× as long as proboscis, rather densely setose; setae about as long as proboscis width. Median ocellus slightly anteriad of lateral ocelli, half the diameter of the latter; lateral ocelli semicircular. Flagellomeres bacilliform, about 3× as long as wide, each with single prominent dark seta near apex.

Thorax ( Fig. 5C, D View FIG ). Laterotergite with 16-17 setae; mediotergite with 6 setae; antepronotum with 5 setae; proepisternum with 6 setae. Mesonotum with short setae forming indistinct dorsocentral and acrostichal rows; with long setae in supra-alar rows and in posterior quarter of mesonotum.

Wing ( Fig. 5B View FIG ). Costa extends beyond R 5 to more than ½ of distance between R 5 and M 1; M 1 and CuA sinuous.

Terminalia ( Fig. 5E, F View FIG ). Tergite 9 ovoid, entirely setose, with dense patch of strong spines on apex. Gonostyli parallelsided, slightly curved inwards, with an apical scoop-shaped tooth. Gonocoxal apodemes heavily sclerotised.

Lygistorrhina (Probolaeus) urichi Edwards, 1912  

( Figs 6 View FIG , 7 View FIG )

Lygistorrhina urichi Edwards, 1912: 204   .

REMARK

The species was described by F. W. Edwards based on a series of 8 specimens (7 males and one female), collected by H. Scott (Cambridge, UK). While the original paper specifies that the type was presented to the British Museum (now Natural History Museum, NHMUK, London), one male and one female specimen were located in this collection. Five male specimens were deposited in the collection of the Museum of Zoology, Cambridge University ( UK). Edwards did not specify the gender of the type specimens deposited in the NHMUK, so the entire type series should be considered as syntypes. Discovery of additional syntypes allows us to emend Edward’s description (only additional or misinterpreted characters being mentioned).

MATERIAL EXAMINED. — Syntypes. Trinidad • 1♂; Diego Martin ; 22.III.1912; H. Scott, herbage by stream; BMNH(E)254352; NHMUK   1 ♀; III.1912, H. Scott; BMNH(E)254351; NHMUK   2 ♂; III.1912, H. Scott; CUMZ   .

EMENDED DESCRIPTION

Male

Head. Scape and pedicel brown, flagellum uniformly pale, as long as thorax; flagellomeres as long as wide or slightly shorter, each with a few irregular dark dorsal setae. Median ocellus round, ½× the diameter of the lateral ocelli, latter semi-circular.

Thorax. Thorax and coxae uniformly dark brown. Antepronotum with three setae, proepisternum with six setae.Laterotergite with 18-19 setae, and mediotergite with 6-8 setae; laterotergite, metepisternum and hind coxa subequal in size. Mesonotum irregularly setose except for posterior 1/3, latter with indistinct dorsocentral rows of setae.

Wing. M 1 straight; M 2 and M 3+4 curved and converging; M 3+4 slightly and CuA conspicuously sinuous.

Abdomen. Tergite 1 of some specimens completely dark, but sternite 1 always with pale transversal posterior band.

Terminalia ( Fig. View FIG 7). Male genitalia narrower than in other species. Tergite 9 oval, almost parallel-sided, 1.5× as long as wide. Gonostyli appearing laterally flattened, slightly wider at apex; apical tooth scoop-shaped, with very dense patch of setae apico-medially. Aedeagus wider than long, bell-shaped, with flat apex; aedeagal apodeme long, curved; gonocoxal apodeme heavily sclerotised.

MNHN

France, Paris, Museum National d'Histoire Naturelle

MNHN

Museum National d'Histoire Naturelle

NMS

National Museum of Scotland - Natural Sciences

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lygistorrhinidae

Genus

Lygistorrhina

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lygistorrhinidae

Genus

Lygistorrhina

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lygistorrhinidae

Genus

Lygistorrhina

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lygistorrhinidae

Genus

Lygistorrhina

Loc

Lygistorrhina (Probolaeus) conica Lygistorrhina (Probolaeus) mitarakensis Lygistorrhina (Probolaeus) cerqueirai Lane, 1958 Lygistorrhina (Probolaeus) urichi Edwards, 1912

Blagoderov, Vladimir & Pollet, Marc 2020
2020
Loc

Lygistorrhina cerqueirai

Lane 1958: 209
1958
Loc

Lygistorrhina urichi

Edwards 1912: 204
1912