Lygistorrhina (Probolaeus) maculipennis 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 maculipennis

description: Lygistorrhina (Probolaeus) maculipennis n. sp.
(Figs 1A, 2A, 3A,B, 4A, B, Table 1)
urn:lsid:zoobank.org:act: 74CF7A8A-8425-4E79-84FE-8D161FA3B61B
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-ED10672; MNHN.
Paratypes. French Guiana • ♂; same data as holotype; 25.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/190; in alcohol; MNHN-ED-ED10673; MNHN • 1 ♂; nr MIT-A-RBF1 (river); 24.III.2015; MT(6 m); Julien Touroult & Eddy Poirier leg.; MITARAKA/193; in alcohol; NMS-10003793; NMS.
DIAGNOSIS. — Wing with a small dark spot at the tip; Sc ends free. Thorax brown with pronotum and dorsal part of katepisternum yellow; fore coxa yellow, mid and hind coxa brown; metepimeron longer than hind coxa. Abdominal tergites and sternites 1-6 with a pale-yellow apical band; gonostyli slightly expanded at the tip.
ETYMOLOGY. — The name of this species refers to its infuscate wing apex.
DESCRIPTION
Male
General coloration. Dark brown (Fig. 1A); measurements, see Table 1.
Head. Rounded, dichoptic. Vertex slightly convex. Rounded ommatidia with subequal diameter, interocular setae subequal to ommatidial diameter. Three ocelli arranged almost in a straight line, with median ocellus slightly anteriad of two lateral ocelli. Antenna light brown, flagellomeres 1-6 yellow (Fig. 1A); antenna shorter than hind femur, length: 0.9-1.1 mm; 14 flagellomeres, with strong dorsal setae (flagellomeres 1-6: one pair, flagellomeres 7-14: two pairs), subcylindrical, gradually tapering; length of flagellomeres 1-6 1.3-1.6× their width, and 2-4× in flagellomeres 7-14. Face longer than wide. Clypeus with straight ventral edge. Palpus length 1.1 mm, tapering towards apex, with a simple row of long setae. Hypopharynx length 1.5 mm; labellum slightly longer.
Thorax. Brown, with antepronotum, prosternum, anepimeron, dorsal parts of anepisternum and katepisternum, and anterodistal part of mesonotum yellow. Scutum irregularly setose. Scutellum rounded, with 4-6 posterior setae. Antepronotum and proepisternum with 4-5 setae each. Laterotergite lobed, with a row of 13-14 setae. Hind coxa shorter than both metepimeron and laterotergite.
Legs. Fore coxa pale-yellow, in some specimens with dark brown basal part; mid and hind coxa completely dark brown, mid coxa with indistinct light brown spot in the centre. Remainder of fore and mid legs yellow; hind femur pale-yellow basally, dark brown in distal 1/3-1/2; hind tibia brown in distal half; hind tarsus brown.Tibiae irregularly setose. 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. 2 A). Membrane hyaline, densely covered with microtrichia; with indistinctly rounded infuscate area at the tip posterior of R 5, not reaching M 1. Sc short, ending free; R 1 at 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, M 2 and M 3+4 almost straight; CuA curved posteriorly, sometimes inconspicuously sinusoid. Anal lobe well developed. Halter white, same length as first abdominal segment.
Abdomen. Dark brown. Segments 1-6 with pale-yellow transversal band in posterior part, occupying 20-30% of segment length; last two segments and terminalia entirely dark brown.
Terminalia (Figs 3A, B, 4A, B). Tergite 9 parallel-sided, apex somewhat rounded, with dense unequal short spines. Sternite 9 oval, parallel-sided, with evenly rounded tip. Gonostyli expanded at tip; apical tooth scoop-shaped. Aedeagal complex (tegmen sensu Huerta et al. 2019) moderately sclerotised, rounded, wider than long. Aedeagal apodeme short, directed laterally, not extending width of aedeagal complex. Spines on 9 th tergite and setae on gonostylus gradually denser towards apex.
COMPARISON
Free Sc is present as well in L. brasiliensis Edwards, 1932, L. barrettoi Lane, 1947, L. sanctaecatherinae Thompson, 1975, and L. cerqueirai Lane, 1958. However, the first three species have wings completely hyaline, without infuscation, and also differ from L. maculipennis n. sp. in the pattern of abdominal markings. L. cerqueirai has abdominal segments 1-6 with pale apical bands similar as the new species, but has a very different pattern of wing spots. In addition, L. cerqueirai has a single dorsal seta on each flagellomere, Costa extends to almost 2/3 of distance between R 5 and M 1, laterotergite and metepimeron are shorter than hind coxa, and M 1 and CuA are conspicuously bent anteriorly and sinusoid.
REMARK
Specimen NMS-10003793 is darker, with thorax and coxae completely dark brown except for extreme tip of fore coxa; abdominal segment 6 has a slightly lighter coloration than the rest of the segment, but the genitalia are of the same structure as the other specimens included in the type series.
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 595-596, DOI: 10.5252/zoosystema2020v42a30, http://zenodo.org/record/4321222