Pieza silvanae Mendes, Lamas, Evenhuis

Mendes, Luanna L., Lamas, Carlos J. E., Evenhuis, Neal L. & Limeira-De-Oliveira, Francisco, 2019, New Pieza Evenhuis (Diptera, Mythicomyiidae, Mythicomyiinae) from Northeast Brazil, Zootaxa 4629 (1), pp. 1-25 : 18-20

publication ID

https://doi.org/10.11646/zootaxa.4629.1.1

publication LSID

lsid:zoobank.org:pub:A8E9B9F1-4CC4-4BF9-81B0-36B1729BCC1B

persistent identifier

https://treatment.plazi.org/id/03D887D1-A303-FFBD-F1A7-8FC9FEDF414A

treatment provided by

Plazi

scientific name

Pieza silvanae Mendes, Lamas, Evenhuis
status

 

Pieza silvanae Mendes, Lamas, Evenhuis & Limeira-de-Oliveira, sp. nov.

( Figs 52–60 View FIGURES 52–60 )

Diagnosis. Mesonotum yellow to pale yellow on the supra-alar area and elliptical prescutellar area ( Fig. 53 View FIGURES 52–60 ). Pseudo-surstylus convergent, tapered toward apex with three strong setae in ventral and posterior views ( Figs 56, 59 View FIGURES 52–60 ). Gonostylus elongate, slender and sinuous, base triangular in ventral view ( Fig. 56 View FIGURES 52–60 ).

Description of holotype male ( Fig. 52 View FIGURES 52–60 ). Body length: 1.14 mm. Wing length: 1.0 mm. Head. Eyes separated at vertex by approximately 2.0X distance between posterior ocelli. Ocellar triangle dark brown, subshiny. Frons dorsal ⅓ brown, ventral ⅔ dark yellow, brown on median depression; setae yellow, small, lateral; face yellow. Pro- boscis dark to dark brown, about ¼ longer than length of head; oral cavity yellow, brown on margin. Postcranium dark brown, postgena yellow, subshiny, pruinosity dense, sparse on median occipital sclerite, setae brown, sparse. Antenna broken, flagellomere lost. Thorax. Mesonotum subshiny, sparsely pruinose, setae yellow, erect and sparse; mesonotum yellow to pale yellow on the supra-alar area and prescutellar elliptical area ( Fig. 53 View FIGURES 52–60 ); prealar and notopleural setae absent. Scutellum yellow, brown medially, with sparse yellow setae. Pleura yellow on the proepimeron, dorsal and posterior margin of anepisternum, dorsal ¼ of katepisternum, posterior margin of anepimeron and about dorsal ½ of meron ( Fig. 54 View FIGURES 52–60 ); posteroventral ⅓ of katepisternum shiny, glabrous. Legs ( Fig. 52 View FIGURES 52–60 ). Forecoxa yellow, infuscated brown on anterodorsal surface, mid and hind coxae yellow. Femora light brown to brown, distal ¼ yellow. Tarsi yellow, tarsomeres II−V dark brown. Wing ( Fig. 55 View FIGURES 52–60 ). Hyaline; costal vein ending at ⅓ proximal distance between veins R 4+5 and M 1; vein R 2+3 arising from Rs at approximately 60° angle, crossvein m-m indistinct, contiguous with end of cell dm. Halter yellow, knob infuscated brown posteriorly. Abdomen. Brown to dark brown, subshiny; tergites without visible shiny areas; setae yellow, longer on tergites IV−VII; tergite I without yellow on posterolateral margin, tergites II−VII with pale yellow band on posterior margins. Sternites brown, each with yellow band on posterior margins. Terminalia. Epandrium rounded, entirely setose in ventral view ( Fig. 56 View FIGURES 52–60 ), subtriangular, ventral margin about 2.0X longer than dorsal margin, anterior margin slightly sinuous in lateral view ( Fig. 57 View FIGURES 52–60 ); epandrium with outer and inner margins rounded in posterior view ( Fig. 59 View FIGURES 52–60 ). Pseudo-surstylus convergent, tapered toward apex and with 3 strong setae in ventral and posterior views ( Figs 56, 59 View FIGURES 52–60 ). Cercus oval, dorsal region weakly sclerotized, ventral region strongly sclerotized, setae concentrated on inner margin in posterior view ( Fig. 59 View FIGURES 52–60 ), projecting posteriorly ( Fig. 57 View FIGURES 52–60 ). Ejaculatory apodeme subequal in length to anterior arm of parameral sheath, more heavily sclerotized on longitudinal axis; medial arms subquadrate tapering proximally, maximum length subequal to width in ventral view ( Fig. 56 View FIGURES 52–60 ), anterior end oval, slightly curved dorsally, ventromedial projection rounded directed posteriorly, apex truncate in lateral view ( Fig. 57 View FIGURES 52–60 ). Lateral ejaculatory process strongly sclerotized basally, slightly sinuous in ventral view ( Fig. 56 View FIGURES 52–60 ), curved posteriorly in lateral view ( Fig. 57 View FIGURES 52–60 ). Phallus funnel-shaped, anterior margin concave with wide median notch in ventral view ( Fig. 56 View FIGURES 52–60 ); basiphallus about 1.25X length of distiphallus in ventral view ( Fig. 56 View FIGURES 52–60 ), distiphallus simple with only one apical opening. Anterior arm of parameral sheath with distal ½ almost 2.0X wider than proximal ½ in ventral view ( Fig. 56 View FIGURES 52–60 ), sclerotization stronger on inner margin. Gonocoxite subrectangular, anterior margin rounded laterally, posterior margin sinuous with small spiny posterolateral projections, setae concentrated on lateromedial region in ventral view ( Fig. 56 View FIGURES 52–60 ); gonocoxite concave and slender, setae on ventrolateral margin in anteroventral view ( Fig. 58 View FIGURES 52–60 ); ventral margin rounded in lateral view ( Fig. 57 View FIGURES 52–60 ). Gonostylus elongate, slender and sinuous, base triangular in ventral view ( Fig. 56 View FIGURES 52–60 ). Female. Similar to male, except for the postcranium more densely pruinose; sternites yellow. Genitalia ( Fig. 60 View FIGURES 52–60 ). Genital fork V-shaped strongly sclerotized, sinuous, anterior projection rectangular; hyaline plate with weakly sclerotized digitiform lateral projections, posterior margin rounded. Common duct indistinct, basal plate sclerotized. Sperm pump robust, about 3.0X longer than its maximum width, caliciform, translucent. Proximal spermathecal duct about 2.0 to 3.0X thicker than distal; distal spermathecal duct about 20.0X longer than proximal, translucent. Valve indistinct. Spermathecal reservoir strongly sclerotized, brown, slightly sinuous, about ½ length of sperm pump, glandular trichomes at proximal and distal ends.

Variation (n = 2). Body length: 1.14–1.20 mm. Wing length: 1.0–1.1 mm. Frons sometimes almost entirely brown, with yellow margins. Male paratype with first flagellomere longer than wide, second flagellomere subequal in length to maximum width of first flagellomere. Mesonotum with submedian antero-mesonotal triangular mark, yellow, evanescent.

Etymology. The specific epithet honors Maria Silvana S. S. Pereira, mother of the first author.

Type material. HOLOTYPE ♂: Brazil, MA[= Maranhão], Carolina, PARNA [=Parque Nacional] Chapada das Mesas, Riacho Sucuruiu , 240 m, 07°07′05.6″S, 47°18′31.6″W / Armadilha Malaise, 01–10.viii.2013, J.A. Rafael, F. Limeira-de-Oliveira, T.T.A. Silva, cols./ MYTH 112 GoogleMaps / Holotype ♂ Pieza silvanae Mendes, Lamas, Evenhuis & Limeira-de-Oliveira ( CZMA) . PARATYPES: same data as holotype, MYTH 11 (pinned: 1♂ CZMA) ; idem / MYTH 89 (pinned: 1♀ CZMA) ; idem / MYTH 141 (1♀ CZMA) ; idem / MYTH 142 (1♀ CZMA) . idem, 20–31.viii.2013 / MYTH 88 (pinned: 1♂ CZMA) .

Geographical record. This species is known only from the Brazilian state of Maranhão ( Fig. 69 View FIGURE 69 ), where the type series was collected in the Cerrado biome.

Remarks. Pieza silvanae sp. nov. differs from the other species from Brazil in having pseudo-surstylus with 3 strong setae at apex ( Fig. 56 View FIGURES 52–60 ) (apex of pseudo-surstylus without strong setae in the other species, Figs 5 View FIGURES 1–9 , 14 View FIGURES 10–17 , 22 View FIGURES 18–26 , 31 View FIGURES 27–34 , 39 View FIGURES 35–42 , 47 View FIGURES 43–51 , 65 View FIGURES 61–68 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Bombyliidae

Genus

Pieza