Dasyhelea mineira Díaz, Felippe-Bauer & Spinelli, 2017

Díaz, Florentina, Felippe-Bauer, Maria Luiza & Spinelli, Gustavo Ricardo, 2017, Two new Neotropical species of the Dasyhelea mutabilis group (Culicomorpha: Ceratopogonidae), Papéis Avulsos de Zoologia (São Paulo) 57 (2), pp. 17-22 : 19-22

Dasyhelea mineira Díaz, Felippe-Bauer & Spinelli

sp. nov.

( Figures 11-19 , 24-27 )

Holotype: ♂, Brasil, Minas Gerais State: Municipality of Santana do Riacho, National Park of Serra do Cipó , 16.I.2011, A.C. Neves col. ( CCER 537 , FIOCRUZ) . Paratype: ♀, same data holotype except 15.I.2011, J.L. Davis col. ( CCER 539 , FIOCRUZ) .

Diagnosis: male with posterolateral arms of aedeagus single, and paramere and gonocoxal apodemes forming a symmetrical structure; paramere straight, tip rectangular, slightly folded. Female with palpal seg- ment 5 very slender and slightly shorter than segment 3, anterior margin of subgenital plate subtriangular, and spermatheca pyriform with stout and recurved neck.

Description: Male adult. Antennal flagellum with flagellomeres 2-4 globular, 5-9 rhomboid, 10-13 elongates ( Fig. 11 ). Palpus ( Fig. 12 ) pale brown; segment 3 bearing scattered sensilla; PR 7.00. Scutellum with 6 large, 3-4 thinner setae. Wing ( Fig. 13 ) length 0.90 mm, width 0.28 mm; CR 0.44. Genitalia ( Figs. 14 , 24 ): tergite 9 slightly tapering distally, reaching to ⅔ of level of apex of gonocoxites; apicolateral process slender, with long, thin seta; cercus short with 2-3 long setae; sternite 9 ( Fig. 25 ) 0.4 X longer than greatest width, posteromedian projection round- ed, reaching ½ of total aedeagus length. Gonocoxite stout, 2.5 X longer than greatest width, with short anteromedian process directed anteromesad; gonostylus 0.9 length of gonocoxite, base wide, tapering abruptly distally, tip pointed, slightly hooked. Paramere and gonocoxal apodemes ( Figs. 14 , 26 ) forming a symmetrical structure; gonocoxal apodemes slender, with stout subbasal tooth; both fused to paramere, latter straight, tip rectangular, slightly folded. Aedeagus ( Figs. 14 , 27 ) 0.8 X longer than greatest width, W/L ratio 0.40; anterior margin nearly straight, basal arms short, directed anterolaterad; posterolateral arms single, tips recurved anteromesally; posteromedian projection stout with rounded tip.

Description: Female adult. Similar to male, except: Head dark brown. Eyes contiguous for distance of width of 1-2 ommatidia. Antennal flagellum dark brown, with flagellomeres 2-8 vasiform, 9-13 more elongate vasiform, 13 longest ( Fig. 15 ); AR 1.02. Clypeus with 7 pairs of setae. Palpus ( Fig. 16 ) brown; segment 3 as long as 4+5; PR 6.00.

Thorax: Scutum dark brown; scutellum with 6 large, 4 thinner setae. Legs brown, tarsomeres 5 infuscated; apex of hind tibia with 6 spines; foreleg TR 2.24, midleg TR 2.47, hind leg missing in the available specimen. Wing ( Fig. 17 ) length 1.03 mm, width 0.40 mm; CR 0.46; membrane hyaline, densely covered with macrotrichia; radial cells obliterated; cubital fork at level of beginning of second radial cell. Halter missing.

Abdomen: Dark brown. Subgenital plate ( Fig. 18 ) with anterior margin subtriangular, posterior margin straight, lumen broad; posteromedian projection small, triangular; posterolateral arms slender, curved. Spermatheca ( Fig. 19 ) pyriform, well sclerotized, measuring 67.5 × 50 um, neck stout, curved, measuring 20 um.

Etymology: The specific epithet “ mineira ” is a reference to the type-locality, in the state of Minas Gerais, Brazil.

Distribution: Brazil (Minas Gerais).

Discussion: Characters for distinguishing D. mineira sp. nov. from D. jorgei sp. nov. may be found in the discussion under the description of the later species.

Dasyhelea minera sp. nov. is also similar to the Patagonian species D. pseudolacustris Díaz & Spinelli and D. ingrami Díaz & Spinelli. However , the posterolateral arms of the aedeagus of D. pseudolacustris are divided and the posteromedian projection is stout and broad; the female has the clypeus with 3 pairs of setae, the scutellum is paler and the spermatheca is spherical. Dasyhelea ingrami is easily distinguished from the new species by the paramere and gonocoxal apodemes forming an asymmetrical structure and the aedeagus lacks the posteromedian projection; the female differs by the subgenital plate lacking posteromedian projection, with the posterolateral arms gen- tly recurved over 90°, and by the spermatheca with straight neck.

Figures

FIGURES 11‑19: Dasyhelea mineira Diaz, Felippe-Bauer & Spinelli sp. nov. Holotype male, adult. (11-14) male; (15-19) female. (11, 15) antennal flagellum; (12, 16) palpus; (13, 17) wing; (14) genitalia; (18) subgenital plate; (19) spermathecae. Scale bars: 0.05 mm.

FIGURES 20‑27: (20-23) Dasyhelea jorgei Diaz, Felippe-Bauer & Spinelli sp. nov. Holotype male (24-27) Dasyhelea mineira Diaz, Felippe-Bauer & Spinelli sp. nov. Holotype male, (20, 24) genitalia; (21, 25) sternite 9; (22, 26) paramere and gonocoxal apodemes; (23, 27) aedeagus. Scale bars: 0.05 mm.