Opeatocerata melanderi, Câmara & Rafael, 2011

Câmara, J. T. & Rafael, J. A., 2011, Two new species of Opeatocerata Melander (Diptera, Empididae, Empidinae) from the Brazilian Amazon Basin, Zootaxa 3062 (1), pp. 37-45 : 38-40

publication ID

https://doi.org/ 10.11646/zootaxa3062.1.4

DOI

https://doi.org/10.5281/zenodo.5282597

persistent identifier

https://treatment.plazi.org/id/0396D166-3703-FFDF-EBFD-FA4BFCA8A726

treatment provided by

Felipe

scientific name

Opeatocerata melanderi
status

sp. nov.

Opeatocerata melanderi View in CoL sp. nov.

( Figs. 3–20 View FIGURES 3–12 View FIGURES 13–20 )

Diagnosis. Abdomen predominantly yellow except lateral margins of tergites 1–7 brown ( Figs. 3, 5 View FIGURES 3–12 ). Anterior cercus with dorsal subrectangular projection ( Fig. 9 View FIGURES 3–12 ) directed anteriorly ( Fig. 8 View FIGURES 3–12 ). Posterior cercus with rounded apex and small ventral protuberance ( Fig. 8 View FIGURES 3–12 ). Phallus subcylindrical, wider medially, longer than hypandrium ( Fig. 13 View FIGURES 13–20 ), and with subapical lobes and four denticles on apex, both best seen in ventral view ( Fig. 14 View FIGURES 13–20 ).

Description. Holotype male ( Fig. 3 View FIGURES 3–12 ). Head: Holoptic, upper ommatidia larger delineated from lower ommatidia. Face parallel-sided, dark brown with grey pruinescence in ventral view, about 3X longer than upper width. Ocellar tubercle protuberant, brown with brown pruinescence, 2 pairs of divergent bristles, anterior pair longest. Ocelli brown. Postocular bristles black, distinct, arranged in complete uniseriate row, progressively longer ventrally. Postcranium brown with grey pruinescence, denser ventrally. Postgena with long yellow bristles. Antenna inserted below middle of head; scape and pedicel yellow with short black bristles; first flagellomere dark brown, about 2X longer than pedicel; stylus aristiform, about 2X longer than first flagellomere. Proboscis shorter than head height, yellow with yellow bristles apically and ventrally on labellum.

Thorax ( Fig. 3 View FIGURES 3–12 ): Yellow, shiny. Pronotum with transverse row of yellow bristles on anterior margin. Thoracic chaetotaxy: 1 acrostichal bristle placed posteriorly, near scutellum and between last and stronger dc; dorsocentral row of uniseriate, slender yellow setulae, interrupted on posterior descendant region and posteriorly with longer bristles; 3 postpronotal setae; 2 robust notopleurals with several smaller setae in front; several supra-alar setae; 2 postalar bristles, posterior stronger; 1 pair of parallel scutellar bristles; laterotergite with 8 long yellow bristles.

Legs ( Fig. 3 View FIGURES 3–12 ): yellow, except apex of trochanter black ventrally, fore tarsomeres 3–5 and mid and hind tarsomeres 4–5 dark brown to black. Hind femur and tibia with black ring on apex. All legs with distinct bristles; hind tibia and tarsus with antero- and posterodorsal rows of long bristles; hind tibia with larger number of bristles.

Wing ( Fig. 4 View FIGURES 3–12 ): Hyaline with conspicuous brown pterostigma, 2.5X as long as deep; M 1 and M 2 slightly upward curved. Halter yellow with brown patch on stem and knob.

Abdomen ( Figs. 3, 5 View FIGURES 3–12 ): Predominantly yellow, except lateral margins of tergites 1–7 brown ( Fig. 3 View FIGURES 3–12 ). Bristles yellow, longest on all segments laterally and on segments 6-8 posteriorly. Tergite 8 shorter than tergite 7, divided in two subtriangular plates ( Fig. 6 View FIGURES 3–12 ). Sternite 8 larger than sternite 7, divided in two subtriangular plates ( Fig. 7 View FIGURES 3–12 ).

Terminalia (paratype): Anterior cercus with dorsal subrectangular projection ( Fig. 9 View FIGURES 3–12 ) directed anteriorly ( Fig. 8 View FIGURES 3–12 ), with distal medial V-shaped sulcus posteriorly in dorsal view ( Fig. 9 View FIGURES 3–12 ); descendant plate of anterior cercus subrectangular with concave ventral margin in posterior view ( Fig. 10 View FIGURES 3–12 ). Posterior cercus with rounded apex and small ventral protuberance in lateral view ( Fig. 8 View FIGURES 3–12 ), with triangular dorsal projection ( Fig. 9 View FIGURES 3–12 ). Hypoproct with long bristles, subcircular in lateral view ( Fig. 8 View FIGURES 3–12 ), comma-shaped in posteroventral view ( Fig. 10 View FIGURES 3–12 ). Epandrium wide, membranous anteriorly, with elongated epandrial lobe acuminate at apex, with longer bristles apically ( Fig. 11 View FIGURES 3–12 ). Subepandrial sclerite and bacilliform sclerite U-shaped, latter with distinct fold. Subepandrial sclerite rather narrow in dorsal view ( Fig. 12 View FIGURES 3–12 ). Hypandrium rather membranous, with small setae, longer than wide with posterior margin rounded, enclosing phallus. Phallus longer than hypandrium, subcylindrical, wider medially ( Figs. 13, 14 View FIGURES 13–20 ), with dorsal subapical appendix, best seen in lateral view ( Fig. 13 View FIGURES 13–20 ) and with lateral subapical lobes and four denticles on apex, both best seen in ventral view ( Fig. 14 View FIGURES 13–20 ). Ejaculatory apodeme tetralamellar ( Figs. 8 View FIGURES 3–12 , 13, 14 View FIGURES 13–20 ).

Specimen length: 3.1 mm; wing length: 3.1 mm.

Female ( Fig. 15 View FIGURES 13–20 ): Similar to male, except dichoptic with subequal ommatidia; frons black and shiny. Wing hyaline, slightly infuscated between pterostigma and vein R 5; M 1 and M 2 evanescent near wing margin ( Fig. 16 View FIGURES 13–20 ). Terminalia: Tergite 8 subrectangular ( Figs. 17, 18, 19 View FIGURES 13–20 ). Sternite 8 wider at base, anterior margin with V-shaped sulcus occupying more than half of sternite ( Figs. 18, 19 View FIGURES 13–20 ). Genital fork wider at base and arms shorter than base ( Figs. 18, 19 View FIGURES 13–20 ). Tergite 10 shorter than half of tergite 8, undivided, with anterior margin concave ( Fig. 17 View FIGURES 13–20 ). Sternite 10 slightly concave basally and distally. Cercus longer than segment 10, with long bristles at apex ( Fig. 19 View FIGURES 13–20 ). Receptacle of spermatheca spherical ( Fig. 20 View FIGURES 13–20 ).

Specimen length: 2.8 mm; wing length: 3.1 mm.

Type material. HOLOTYPE ♂, labelled: BRASIL, AM [azonas], Manaus , Rod [ovia] AM 010 , Km 50, ZF2, Km 14, próximo à torre [near tower], 02 ° 35'21''S; 60 ° 05'55''W / 4.iii.2011. 00–03:00h. Arm [adilha] luz móvel. J.A. Rafael & R. F. Silva leg ( INPA) GoogleMaps . PARATYPES: same as holotype (75 ♂, 89 ♀, INPA) . idem, 4.iii.2011. 03–06:00h. Arm. luz móvel. J.A. Rafael & R. F.Silva (14 ♂, 5 ♀, MZUSP) ; idem, 3–4.iii.2011, 21–00:00h (4 ♂, 7 ♀, UFPR) ; idem, 6.iii.2011. 00–03:00h. Arm. luz móvel. J.A. Rafael, J. T. Câmara & P.Dias leg (10 ♂, 10 ♀, USNM; 10 ♂, 10 ♀, BMNH; 10 ♂, 10 ♀, CNC; 10 ♂, 10 ♀, CZMA; 10 ♂, 10 ♀, INBio; 22 ♂, 16 ♀, INPA) ; idem, 6.iii.2011. 03– 06:00h (28 ♂, 35 ♀, MPEG) .

Holotype condition. Good, not dissected.

Etymology. The name melanderi is dedicated to A.L. Melander, author of the Opeatocerata .

Remarks. Opeatocerata melanderi differs from all other known species by having the lateral margin of tergites 1–7 brown and distinctive genitalia, especially the phallus which has denticles at the apex.

Variation. Male and female specimens with body length from 2.7–3.3 mm. Pterostigma from 2–2.5 times as long as deep. Some paratypes with 2 pairs of scutellar bristles.

AM

Australian Museum

R

Departamento de Geologia, Universidad de Chile

INPA

Instituto Nacional de Pesquisas da Amazonia

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

T

Tavera, Department of Geology and Geophysics

USNM

Smithsonian Institution, National Museum of Natural History

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

INBio

National Biodiversity Institute, Costa Rica

MPEG

Museu Paraense Emilio Goeldi

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Empididae

Genus

Opeatocerata

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