Dasyhelea gargola Díaz and Spinelli, 2010

Díaz, Florentina, Spinelli, Gustavo R. & Ronderos, María M., 2010, A revision of the species allied to Dasyhelea patagonica Ingram and Macfie (Diptera: Ceratopogonidae), Journal of Natural History 44 (45 - 46), pp. 2825-2849 : 2834-2836

publication ID	https://doi.org/ 10.1080/00222933.2010.512424
persistent identifier	https://treatment.plazi.org/id/039487A8-FFC5-4436-FEFF-385D8BB1FAB2
treatment provided by	Felipe
scientific name	Dasyhelea gargola Díaz and Spinelli
status	sp. nov.

Treatment

Dasyhelea gargola Díaz and Spinelli View in CoL sp. nov.

( Figures 2 View Figure 2 , 4 View Figure 4 )

Diagnosis

The only species of the patagonica group with the posteromedian margin of the male sternite 9 with a deep rounded excavation, and the posterolateral margins of the excavation broad and truncate. The female subgenital plate is rectangular, with irregular anterior margin.

Male. Similar to female with usual sexual differences. Flagellum as in Figure 4A View Figure 4 . Palpus ( Figure 4B View Figure 4 ) with third segment bearing scattered sensilla; PR 4.23, fifth segment missing. Scutellum with 18 long setae and 18 shorter ones. Wing ( Figure 4C View Figure 4 ) length 1.74 mm, width 0.50 mm, CR 0.51. Genitalia ( Figure 4D View Figure 4 ): tergite 9 tapering distally, extending to level of apex of gonocoxite, apicolateral process slender, with apical seta; cercus with three or four setae; sternite 9 ( Figure 4E View Figure 4 ) 0.5 times longer than greatest width, posteromedian margin with deep, rounded anteromesal excavation, posterolateral margins of excavation broad, truncate. Gonocoxite stout, 1.9 times longer than greatest width, with short, blunt anteromedian process; gonostylus slender, as long as gonocoxite, narrow base, nearly straight, tip pointed. Parameres ( Figure 4F View Figure 4 ) with basal arms stout, with conspicuous laterodistal, pointed processes; anteromesad projection short, blunt, fused to posteromedian projection, the latter slender, slightly produced beyond distal portion of aedeagus body, with lightly recurved tip. Aedeagus well sclerotized, 0.75 times longer than greatest width, basal arch extending to 0.25 of total length; basal arms stout, short, recurved; body stout with triangular pointed, divergent posterolateral projections; posterolateral arms convergent, tips recurved mesad.

Female. Head dark brown. Eyes contiguous by width of two to three ommatidia. Antenna with flagellum ( Figure 4G View Figure 4 ) dark brown; AR 1.13 (1.09–1.17, n = 2). Clypeus ( Figure 4H View Figure 4 ) with 14–17 setae. Palpus ( Figure 4I View Figure 4 ) dark brown; third segment with four sub-basal capitate sensillae; PR 3.82 (3.71–3.93, n = 2).

Thorax. Scutum dark brown, scutellum with 19–20 long setae and 15–16 shorter ones. Legs dark brown, including tarsi; hind tibial comb with five spines; prothoracic TR 1.88, mesothoracic TR 1.90, metathoracic TR 1.87 (1.84–1.90, n = 2). Wing ( Figure 4J View Figure 4 ), length 1.46 mm (1.44–1.48 mm, n = 2), width 0.58 mm (0.56– 0.60 mm, n = 2), CR 0.52 (n = 2); membrane slightly infuscated, densely covered with macrotrichiae; second radial cell open; cubital fork at same level of anterior portion of second radial cell. Halter dark brown.

Abdomen. Dark brown. Subgenital plate ( Figure 4K View Figure 4 ) rectangular, anterior margin irregular; posterolateral arms stout, posteromedian projection stout, inner margin straight distally. Two ovoid spermathecae ( Figure 4L View Figure 4 ), subequal, with straight necks, measuring 0.048 by 0.042 mm and 0.044 by 0.038 mm, necks 0.004 mm.

Distribution

Argentina, only known from its type locality .

Type material

Holotype male, Argentina, Rio Negro, Parque Nacional Nahuel Huapi, cerro Catedral, laguna Toncek , 41 ◦ 11 ′ 52.2 ′′ S, 71 ◦ 29 ′ 31.2 ′′ W, 1770 m, 20 February 2007, C. Cazorla – M. Donato, red GoogleMaps . Paratypes, 2 females, same data ( MLP) GoogleMaps .

Etymology

The specimens herein described as a new species were collected in the laguna Toncek located in the cerro Catedral. The specific epithet refers to the gargoyles that are common sculptures of Cathedrals.

Discussion

The male genitalia of this species are similar to those of D. ona , especially by the aedeagus stout body and the triangular pointed, divergent posterolateral projections. However, it can be distinguished from D. ona by several other characteristics that may be found in the discussion under the description of the later species.