Dasyhelea reynoldsi Ingram and Macfie, 1931

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 : 2843-2845

publication ID

https://doi.org/ 10.1080/00222933.2010.512424

persistent identifier

https://treatment.plazi.org/id/039487A8-FFDC-442F-FE3D-39698B11FA50

treatment provided by

Felipe

scientific name

Dasyhelea reynoldsi Ingram and Macfie, 1931
status

 

Dasyhelea reynoldsi Ingram and Macfie, 1931

( Figures 7 View Figure 7 , 8 View Figure 8 )

Dasyhelea reynoldsi Ingram and Macfie, 1931: 185 (male, female, Argentina); Wirth, 1974: 18 (in catalogue of south USA species); Borkent and Wirth, 1997: 57 (in World catalogue); Spinelli, 1998: 325 (in list; Argentina); Borkent and Spinelli, 2000: 26 (in catalogue south USA species), Borkent and Spinelli, 2007: 61 (in Neotropical catalogue); Borkent, 2009: 69 (online catalogue).

Diagnosis

The only species of the patagonica group with the sternite 9 of male bearing a posterior trefoil-shaped projection and the gonostylus with a double curve.

Male. Similar to female with usual sexual differences. Flagellum as in Figure 8A View Figure 8 brown. Palpus ( Figure 8B View Figure 8 ) brown; with third segment bearing scattered sensilla; PR 5.23 (4.53–6.08, n = 10). Scutellum with 24–34 long setae and 12–16 shorter ones. Wing ( Figure 8C View Figure 8 ), length 1.81 mm (1.72–1.94 mm, n = 9), width 0.52 mm (0.50– 0.56 mm, n = 9), CR 0.50 (0.49–0.51, n = 9). Genitalia ( Figure 8D View Figure 8 ): tergite 9 not reaching to level of apex of the gonocoxite, tip broad, truncate, apicolateral process slender, with apical seta; cercus with four or five short setae; sternite 9 ( Figure 8E View Figure 8 ) 0.65 times longer than greatest width, posteromedian margin narrow, slightly concave, with posterior projection trefoil-shaped slightly produced beyond aedeagus tip. Gonocoxite stout, 2.2 times longer than greatest width, with conspicuous anteromedian process directed anteromesad; gonostylus as long as gonocoxite, slender, with a double curve, tip pointed. Parameres ( Figure 8F View Figure 8 ) with basal arms slender, curved; posteromedian projection triangular with blunt tip, reaching midlength of aedeagus. Aedeagus strongly sclerotized, 0.5 times longer than greatest width, basal arch extending to 0.4 of total length; basal arms slender, curved directed laterad; posterolateral arms stout recurved ventrad.

Female. Head dark brown. Eyes contiguous by width of two ommatidia. Antenna with flagellum ( Figure 8G View Figure 8 ) very dark brown, AR 1.01 (1.00–1.08, n = 10). Clypeus ( Figure 8H View Figure 8 ) with seven or eight setae. Palpus ( Figure 8I View Figure 8 ) dark brown; third segment with two sub-basal capitate sensillae; PR 4.21 (3.33–4.57, n = 10).

Thorax. Scutum very dark brown, scutellum with 20–26 long setae and 14–22 shorter ones. Legs very dark brown, except tarsis pale brown; hind tibial comb with six spines; prothoracic TR 1.80 (1.59–2.00, n = 10), mesothoracic TR 1.90 (1.76–2.27, n = 10), metathoracic TR 1.79 (1.71–1.85, n = 10). Wing ( Figure 8J View Figure 8 ), length 1.68 mm (1.52–1.78 mm, n = 10), width 0.67 mm (0.64–0.74 mm, n = 10), CR 0.53 (0.51–0.55, n = 10); membrane slightly infuscated, densely covered with macrotrichiae; cubital fork at same level of anterior portion of second radial cell. Halter dark brown.

Abdomen. Dark brown. Subgenital plate ( Figure 8K View Figure 8 ), subtriangular; posterolateral arms stout, inner margin with bulbous protuberance. Two ovoid spermathecae ( Figure 8L View Figure 8 ), subequal, with straight necks, measuring 0.056 by 0.038 mm and 0.054 by 0.038 mm, necks 0.004 mm.

Distribution

Argentina (Santa Cruz, Tierra del Fuego) .

Type material

Holotype male, allotype female, Argentina, Tierra del Fuego prov., Río Grande , estancia Viamonte, 1930, P. W. Reynolds ( NHM, examined).

Other specimens examined

Argentina, Santa Cruz prov., Lago del Desierto , 9 December 1996, G. Spinelli, 3 males ( MLP) . Tierra del Fuego prov., 40 km west of Río Grande , 3 December 2005, G. Spinelli, 1 male, red ( MLP) ; Parque Nacional Tierra del Fuego, Río Ovando y ruta nacional no. 3, 54 ◦ 50 ′ 45.3 ′′ S, 68 ◦ 34 ′ 47.7 ′′ W, 1 December 2008, G. Spinelli, 1 male, red ( MLP) GoogleMaps ; laguna Negra (turbera), 54 ◦ 50 ′ 2.1 ′′ S, 68 ◦ 35 ′ 17.9 ′′ W, 15 m, 4–7 December 2008, M. Donato - G. Spinelli, 4 males, Malaise trap ( MLP) GoogleMaps ; Lago Yehuin , 54 ◦ 21 ′ 39.6 ′′ S, 67 ◦ 46 ′ 44.4 ′′ W, 45 m, 5 December 2008, G. Spinelli, 1 female, red ( MLP) GoogleMaps ; río San Pablo y ruta complementaria a, 54 ◦ 17 ′ 59.5 ′′ S, 66 ◦ 42 ′ 42.5 ′′ W, 12 m, 3 December 2008, G. Spinelli, 1 male, red ( MLP) GoogleMaps ; ruta complementaria a (turbera), 54 ◦ 21 ′ 42.3 ′′ S, 66 ◦ 39 ′ 42.4 ′′ W, 40 m, 3 December 2008, G. Spinelli, 8 females, red ( MLP) GoogleMaps .

Discussion

This species, restricted to southern Patagonia, is very similar to D. s hannoni. However, the latter species is smaller, the sternite 9 of the male is arrow-shaped, the posterolateral arms of the aedeagus are convergent and the female subgenital plate is higher.

The type-locality of D. reynoldsi is located in the Argentinean side of the island of Tierra del Fuego, not in Chile as stated by Wirth (1974) and followed by Borkent and Wirth (1997) and Borkent and Spinelli (2000, 2007). On the other hand, Spinelli (1998) properly recorded the species from Argentina.

NHM

University of Nottingham

MLP

Museo de La Plata

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Ceratopogonidae

Genus

Dasyhelea

Loc

Dasyhelea reynoldsi Ingram and Macfie, 1931

Díaz, Florentina, Spinelli, Gustavo R. & Ronderos, María M. 2010
2010
Loc

Dasyhelea reynoldsi

Borkent, A & World Species of Biting Midges 2009: 69
Borkent A & Spinelli GR 2007: 61
Borkent A & Spinelli GR 2000: 26
Spinelli GR 1998: 325
Borkent A & Wirth WW 1997: 57
Wirth WW 1974: 18
Ingram A & Macfie JWS 1931: 185
1931
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