Paracestrotus pulchripennis Silva

Silva, Vera Cristina, 2006, Systematic review of Neotropical genera of Lauxaniidae: 3. The genus Paracestrotus Hendel, 1925 (Diptera: Schizophora), Zootaxa 1249, pp. 61-68 : 64-66

Paracestrotus pulchripennis Silva , sp. nov.

( Figs. 2–3 )

Diagnosis

This species is distinguished by a darker body with grayish pruinosity; a shiny dark brown hump on the frons; and pale legs with dark rings on femora.

Description

Male: Length: body 6.2 mm; wing 5.0 mm. Head (figs. 2A, B): vertex sharp; ocellar triangle dark brown, close to vertex. Frons almost square; posterior ½ yellow, frontal plate bright brown, strongly sclerotized, more elevated than fronto­orbital plate; black­velvet antenno­orbital spot large, extending from anterior to lateral margins; with one white pruinose spot at top of parafacial; anterior margin straight, almost in same plane as face. Face dull; in profile straight; light yellow, with wide brown transverse stripe medially. Eye oval; posteroventral outline concave. Parafacial narrow; gena short, whitish yellow with white pruinosity. Mouthparts whitish yellow, distal parts darker; palpus slender, dark brown. Antenna: scape shorter than pedicel, both yellow; pedicel with long apical ventral bristles; first flagellomere long (length 2,5 times basal width), yellow, apex and ventral part brown; first flagellomere with dorso­apical pubescence; arista black, long plumose, rays longer dorsally. Chaetotaxy: outer vertical seta 2/3 length of inner vertical setae; ocellar seta minute; postocellar setae long, cruciate; orbital setae reclinate, anterior seta 2/ 3 length of posterior seta; 2 genal setae.

Thorax: with grayish pruinosity; mesonotum slightly arched, dark brown; scutellum flat, apical margin rounded and yellow; pleura brown, with whitish yellow central longitudinal stripes through proepimeron, proepisternum, and lower part of anepisternum, katatergite and anatergite. Chaetotaxy: dorsocentral setae arranged 0+2, posteriorly located, anterior seta smaller than posterior seta; 1 prescutellar acrostichal seta; 8 rows of acrostichal setulae; intra­alar seta absent; 1 presutural and 1 postsutural supra­alar setae; 2 postalar setae; 1 postpronotal seta; 2 notopleural setae; 1 minute proepisternal seta; 1 anepisternal seta; anepimeron bare; 1 katepisternal seta; 2 scutellar setae, apical pair parallel. Legs: whitish yellow with brown stripes on most segments: basal ½ of fore femur, basal 1/3 of mid and hind femora, last three tarsomeres of mid and hind tarsi; mid and hind tibiae brown, with basal and subapical lighter stripes. Chaetotaxy: fore coxa with 1 subapical dorsal seta, 1 apical dorsal seta; fore femur with posterodorsal and posteroventral rows of setae; mid coxa with apical row of setae; mid tibia with 1 preapical anterodorsal seta, 1 strong apical ventral seta; hind coxa with 1 apical dorsal seta; hind femur with 1 subapical dorsal seta; hind tibia with 1 preapical dorsal seta. Wing (fig. 2C) patterned, brown with light yellow rounded spots; veins brown; costa sapromyziform; R bare; crossvein r­m in apical 1/3 of discal cell; crossvein dm­cu in basal 1/3 of r4+5; longitudinal veins slightly sinuous in middle of wing; R4+5 approaching M close to apex; anal vein shorter than cell cup. Halter whitish yellow.

Abdomen: dark brown with grayish pruinosity. Terminalia (fig. 3): epandrium subrectangular in lateral view. Surstyli rounded, small, free from epandrium. Hypandrium semirounded, narrow, with pointed median projection. Paramere present as a bipartite lobe. Aedeagus short cylindrical; with long inner stylets in apical portion; aedeagal apodeme small, rod­like; small ejaculatory apodeme present. Sternite 10 present, well developed, joining bases of surstyli. Cercus wide, papillate.

Female: unknown.

Etymology

pulcher (Latin), meaning beautiful + penna (Latin), meaning feather, to denote the patterned wing of this species. To be treated as a noun in apposition.

Type material

Holotype: male; Brazil, Pará, Belém, Mocambo, 1.vii.1965, H.S.Lopes & P.W. Miranda coll. ( MZSP). Paratypes: 1 male, same data as holotype ( MZSP); 1 male, Brazil, Amazonas, Tapuruquara, Rio Negro, 26–27.xi.1962, J. Bechyné coll. ( MZSP).

Figures

FIGURE 2. Paracestrotus pulchripennis, sp. nov. A) Head, frontal view. B) Head, lateral view. C) Wing.

FIGURE 3. Paracestrotus pulchripennis, sp. nov. Male terminalia. A) Epandrial complex, lateral view. B) Aedeagal complex, ventral view. C) Aedeagal complex, lateral view.