Lygistorrhina (Probolaeus) conica Blagoderov & Pollet 2020, n. sp.
Creators: name: Blagoderov, Vladimir
name: Pollet, Marc
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lygistorrhinidae
Lygistorrhina
Lygistorrhina conica

description: Lygistorrhina (Probolaeus) conica n. sp.
(Figs 1B, 2B, 3C, D, 4C, D, Table 1)
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 • 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 • 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.
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).
Measurements. See Table 1.
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); 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). 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; 4C, D). 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); 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).
description: Published as part of Blagoderov, Vladimir & Pollet, Marc, 2020, Diversity of Lygistorrhina (Probolaeus) Williston, 1896 (Diptera: Keroplatidae, Lygistorrhininae) of Mitaraka (French Guiana), with descriptions of three new species, pp. 593-606 in Zoosystema 42 (30) on pages 596-598, DOI: 10.5252/zoosystema2020v42a30, http://zenodo.org/record/4321222