Syneches flaviscutellatus, Soares & Freitas-Silva & Ale-Rocha, 2021

Soares, Matheus M. M., Freitas-Silva, Rafael A. P. & Ale-Rocha, Rosaly, 2021, Review of Brazilian species of Syneches Walker (Diptera, Hybotidae, Hybotinae), with description of ten new species, Zootaxa 5049 (1), pp. 1-84: 35-37

publication ID

https://doi.org/10.11646/zootaxa.5049.1.1

publication LSID

lsid:zoobank.org:pub:F9647501-7F6B-4286-AEEE-19B620F697ED

DOI

http://doi.org/10.5281/zenodo.5579476

persistent identifier

http://treatment.plazi.org/id/9883CCA4-5C6A-47EF-999B-A16E25F1D0B9

taxon LSID

lsid:zoobank.org:act:9883CCA4-5C6A-47EF-999B-A16E25F1D0B9

treatment provided by

Plazi

scientific name

Syneches flaviscutellatus
status

sp. nov.

Syneches flaviscutellatus   sp. nov.

( Figs 21A–D View FIGURE 21 , 22A–C View FIGURE 22 , 57 View FIGURE 57 )

Diagnosis. Medium size (3.5 mm) ( Fig. 21A View FIGURE 21 ). Antenna yellow, but scape brown ( Fig. 21B View FIGURE 21 ). Scutum rounded, as broad as mesopleuron in lateral view, orangish yellow and covered with golden pruinescence ( Fig. 21A View FIGURE 21 ). Pleura yellow, except anepimeron and posterior half of laterotergite brown ( Fig. 21A View FIGURE 21 ). Legs with fore tibia pale brown, but base and apex yellow, fore tarsus, mid and hind tarsomeres 5 and apex of hind femur brown, otherwise yellow ( Figs 21A, C View FIGURE 21 ). Wing sub-hyaline, light brown; pterostigma long, oval, brown, about 3.5 x longer than wide, extending from apex of R 1 and not filling apex of cell r 1; second section of M 1 2 x longer than crossvein r-m; cell bm slightly longer than cells br and cua ( Fig. 21D View FIGURE 21 ).

Description. Holotype male ( Fig. 21A View FIGURE 21 ). Body length: 3.5 mm. Wing length: 3.0 mm. Head ( Fig. 21B View FIGURE 21 ). Ocellar triangle protuberant, covered with reddish brown pruinescence; 2 pairs of ocellar bristles, anterior pair about 2 x longer than posterior pair. Face dark brown. Antenna yellow, but scape brown; postpedicel short oval, about 1.5 x longer than wide, as long as preceding segments combined, covered with concolorous pruinescence, 1 long mediodorsal bristle about as long as postpedicel; antennal stylus brown, about 3.5 x longer than preceding segments combined, short pubescent except on apical 1/5. Proboscis, palpus and palpifer yellow; palpus short, about 1/4 length of proboscis, covered with concolorous pruinescence, with 2 bristles as long as palpus (1 medioventral, 1 apical). Postcranium dark brown, covered with golden pruinescence. Thorax ( Fig. 21A View FIGURE 21 ). Proepisternum short; prosternum isolated, not fused to proepisternum. Pronotum brown, covered with golden pruinescence. Scutum rounded, as broad as mesopleuron in lateral view, orangish yellow, except posterior margin of pprn lb and pal cal pale yellow, scutum covered with golden pruinescence. Scutellum orangish yellow, covered with golden pruinescence. Pleura yellow, with anepimeron and posterior half of laterotergite brown. Mediotergite pale brown with brown median stripe. Chaetotaxy: acr 4-serial, dc uniserial, bristles short and sparse; prescutellar disc with 1 long and convergent acr and 1 long dc; 2 long npl bristles close to each other; 2 pal bristles (anterior short and thin, posterior long and strong, about 4 x longer than anterior); scutellum with 10 marginal bristles (1 convergent apical bristle, 1 long and strong subapical bristle, about 2 x longer than apical bristle, 3 lateral bristles similar to apical bristle). Legs ( Figs 21A, C View FIGURE 21 ). Femora slender. Legs with fore tibia pale brown, but base and apex yellow, fore tarsus, mid and hind tarsomere 5 and apex of hind femur brown, otherwise yellow. Chaetotaxy: bristles pale yellow to dark brown; fore tibia with 1D series of bristles slightly longer than covering bristles; mid femur with 1AV and 1PV series of long bristles, shortening towards apex of femur; mid tibia with 1D short bristle on basal third, 1AV and 1PV long and strong subapical bristles; hind tibia with 1PD short near mid-length of tibia and 1D short subapical bristle, 1PD series on apical half, lengthening towards apex of tibia. Wing ( Fig. 21D View FIGURE 21 ). Sub-hyaline, light brown; pterostigma long, oval, brown, about 3.5 x longer than wide, extending from apex of R 1 and not filling apex of cell r 1; R 2+3 slightly angulate near apex; second section of M 1 2 x longer than crossvein r-m; cell bm slightly longer than cells br and cua. Halter pale brown. Abdomen ( Fig. 21A View FIGURE 21 ). About 2 x longer than thorax. Brown, covered with concolorous pruinescence; bristles dark brown, dorsal ones shorter, laterodorsal ones longer. Male terminalia ( Figs 22A–C View FIGURE 22 ) (Paratype, typelocality). Hypandrium slightly convex on distal margin, with two short triangular subapical protuberances, each bearing 1 long bristle as long as exposed part of phallus. Phallus long, narrower and rounded on apex, with 1 long and strong lateral spiniform projection, reaching base of phallus. Postgonite shorter than phallus, sinuous on apical half, rounded apically. Epandrial lamella wide, narrowing suddenly on apical half, with short and narrow apicodorsal projection.

Female. Unknown.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL, MT [Mato Grosso], Chapada dos Guimarães, 15°25′46,7″S 55°50′4,18″W, 03–13.ix.2008, Almeida, Kawada, Fernandes & Rosa col.” “ HOLOTYPE, Syneches flaviscutellatus Soares, Freitas-Silva & Ale-Rocha   ” [red label] GoogleMaps   . Holotype condition: good; not dissected. PARATYPE. Same data as holotype (1 ♂, MZUSP) GoogleMaps   .

Distribution. Brazil (Mato Grosso) ( Fig. 57 View FIGURE 57 ). Syneches flaviscutellatus   sp. nov. is registered only from the Cerrado biome.

Variation. The male paratype differs from the holotype in having the mediotergite wholly brown.

Remarks. The new species is similar to S. fasciatus   sp. nov. by the brown pronotum clearly contrasting with the extensively orangish yellow scutum, but it differs by the scutum lacking acr dark stripe and the male terminalia with hypandrium slightly convex on distal margin, with two short triangular subapical protuberances (see also “Remarks” under S. fasciatus   sp. nov.).

Etymology. From the Latin, flavus = yellow, and scutellum = scutum, in reference to the color of the scutum.

INPA

Instituto Nacional de Pesquisas da Amazonia

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Hybotidae

Genus

Syneches