Dasyhelea jorgei 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

Dasyhelea jorgei Díaz, Felippe-Bauer & Spinelli

sp. nov.

( Figures 1-10 , 20-23 )

Holotype: ♂, Peru, Cuzco: Pagoreni , VII.2004, J. Williams col, at light ( MPLA) . Paratypes: 3 ♂, 1 ♀ same data as holotype ( MLPA) .

Diagnosis: male with posterolateral arms single and subparallel, and posteromedian projection of aedeagus stout and rounded with notched tip. Female with palpal segment 5 very slender and slightly shorter than segment 3, and spermatheca pyriform with stout and straight neck.

Description: Male adult. Antennal flagellum brown; with flagellomeres 2-4 globular, 5-9 rhomboid, 10-13 elongates ( Fig. 1 ). Clypeus with 4 pairs of setae ( Fig. 2 ). Palpus ( Fig. 3 ) pale brown; segment 5 0.60 length of segment 3; PR 5.33-6.16 (5.70, n = 4). Scutellum with 6 large, 2 thinner setae. Wing ( Fig. 4 ) length 0.80-0.88 (0.84, n = 4) mm, width 0.26-0.30 (0.27, n = 4) mm; CR 0.44-0.47 (0.46, n = 4). Genitalia ( Figs. 5 , 20 ): tergite 9 broad on anterior half, distal half tapering to rounded tip, reaching to level of apex of gonocoxites, apicolateral process slender with apical seta; cercus short with 3-4 setae; sternite 9 ( Fig. 21 ) 0.4 length of greatest width, posteromedian projection rounded, reaching ½ of total aedeagus length. Gonocoxite stout, 1.8 X longer than greatest, mesal width, with short mesal process; gonostylus 0.9 length of gonocoxite, base wide, slightly curved with pointed tip. Paramere and gonocoxal apodemes ( Figs. 5 , 22 ) forming an asymmetrical structure; gonocoxal apodemes stout, proximal ⅔ nearly straight, distal ⅓ directed mesally, with short, pointed, subbasal tooth; right apodeme broadly fused with paramere, left apodeme not contacting paramere, latter slender, simple, tapering distally, tip rounded, produced beyond apex of sternite 9 by short distance. Aedeagus ( Figs. 5 , 23 ) 1.1 X longer than greatest width, W/L ratio 0.38-0.45 (0.41, n = 4); anterior margin slightly convex, basal arms slender, well sclerotized, directed anterolaterally; posterolateral arms single, subparallel, each with apex abruptly recurved ventrolaterally; posteromedian projection stout, rounded with notched tip, produced beyond recurved apices of posterolateral arms.

Description: Female adult. Similar to male, except: Head brown. Eyes contiguous for distance of width of 2-3 ommatidia. Antennal flagellum brown; with flagellomeres 2-8 vasiform, 9-13 more elongate vasiform, 13 longest ( Fig. 6 ) AR 0.74. Clypeus with 5 pairs of setae. Palpus ( Fig. 7 ) pale brown; segment 5 0.83 length of segment 3; PR 4.33.

Thorax: Uniformly brown; scutellum with 6 large, 1 thinner setae. Legs brown; apex of hind tibia with 8 spines; foreleg TR 1.60, midleg TR 2.03, hind leg TR 2.14. Wing ( Fig. 8 ) length 0.56 mm, width 0.28 mm; CR 0.46; membrane hyaline, densely covered with macrotrichia; radial cells obliterated; cubital fork at level of beginning of second radial cell. Halter pale.

Abdomen: Dark brown. Subgenital plate ( Fig. 9 ) semicircular, with broad, lumen, posterior margin straight; posteromedian projection slender, pointed; posterolateral arms stout, curved. Spermatheca ( Figs. 9-10 ) pyriform, well sclerotized, measuring 26 × 34 um, neck stout, straight, measuring 16 um.

Etymology: This species is named after Prof. Jorge D. Williams, herpetologist at the Museo de La Plata, Argentina, in recognition of his friendship and important help collecting ceratopogonids.

Distribution: Peru (Cuzco).

Discussion: Dasyhelea jorgei sp. nov. is very similar to the other species herein described as new, D. mineira sp. nov., by virtue of the very elongate and slender palpal segment 5. However, in males of D. mineira sp. nov. the paramere and gonocoxal apodemes form a symmetrical structure, and the female spermatheca has a stout and oblique neck.

This new species is also similar to the Patagonian species D. pseudolacustris Díaz & Spinelli. However , the palpal segment 5 of the latter species is shorter and stouter, the paramere and gonocoxal apodemes form a symmetrical structure, and the female spermatheca is spherical.

Figures

FIGURES 1‑10: Dasyhelea jorgei Diaz, Felippe-Bauer & Spinelli sp. nov. Holotype male, adult. (1-5) male; (6-10) female. (1, 6) antennal flagellum; (2) clypeus; (3, 7) palpus; (4, 8) wing; (5) genitalia; (9) subgenital plate; (10) 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.