Dasyhelea ingrami Díaz and Spinelli, Diaz and Spinelli, 2014

Díaz, Florentina, Spinelli, Gustavo R., Donato, Mariano & Ronderos, María M., 2014, A taxonomic revision of the Patagonian species of the Dasyhelea mutabilis species group with a phylogenetic analysis of New World species (Diptera: Ceratopogonidae), Journal of Natural History (J. Nat. Hist.) 48 (35 - 36), pp. 2117-2175: 2135-2136

publication ID

http://doi.org/ 10.1080/00222933.2014.909062

publication LSID

lsid:zoobank.org:pub:39D6AE31-36D1-4CBF-8C43-40050801ECAD

persistent identifier

http://treatment.plazi.org/id/EF27529A-F885-423A-A0EF-5E2E42DCCD62

taxon LSID

lsid:zoobank.org:act:EF27529A-F885-423A-A0EF-5E2E42DCCD62

treatment provided by

Felipe

scientific name

Dasyhelea ingrami Díaz and Spinelli
status

sp. nov.

Dasyhelea ingrami Díaz and Spinelli   sp. nov.

( Figures 4 View Figure 4 , 18E,F View Figure 18 , 21 View Figure 21 )

Diagnosis

Only species of Dasyhelea   in Patagonia with the following combination of characters: male with posterolateral arms of aedeagus single, tapering distally to anteroventrally recurved tip; paramere and gonocoxal apodemes forming an asymmetrical structure, paramere stout with blunt rounded tip. Female subgenital plate circular with posterolateral arms gently recurved over 90° and spermatheca ovoid with very short, narrow straight neck.

Description of male. Similar to female with usual sexual differences. Antennal flagellum as in Figure 4A View Figure 4 . Palpus ( Figure 4B View Figure 4 ) pale; segment 3 slender, with scattered mesal capitate sensilla; PR 5.00–6.00 (5.73, n = 10). Scutellum with 7–8 large, 3–4 thinner setae. Wing ( Figure 18F View Figure 18 ) length 1.02–1.26 (1.17, n = 8) mm, width 0.33–0.42 (0.37, n = 8) mm; CR 0.41–0.45 (0.43,n = 8). Genitalia ( Figure 4C View Figure 4 ): tergite 9 rounded distally, reaching level of apex of gonocoxites, apicolateral process stout, triangular, broadly divergent with apical seta; cercus small with 2–3 very small setae; sternite 9 ( Figure 4D View Figure 4 ) 0.5 length of greatest width, posteromedian projection rounded. Gonocoxite stout, 1.6 × longer than greatest width, with anteromedian process heavily sclerotized; gonostylus 0.9 length of gonocoxite, wide basally, tapering abruptly at mid-length, apex broader, hook-like, tip pointed. Paramere and gonocoxal apodemes ( Figure 4E View Figure 4 ) forming a slightly asymmetrical structure; gonocoxal apodemes stout, slightly curved, left apodeme slightly contacting paramere, right apodeme broadly fused with paramere; paramere moderately slender with blunt rounded tip reaching subapical portion of aedeagus. Aedeagus 0.9 length of greatest width; anterior margin slightly curved, heavily sclerotized; basal arms short, recurved, directed laterad; posterolateral arms single, lightly sclerotized, wide basally, tapering slightly distally to anteroventrally recurved tips; without posteromedian projection.

Description of female. Head dark brown. Eyes contiguous for the distance of width of 3 ommatidia. Antennal flagellum ( Figure 4F View Figure 4 ) pale brown; AR 1.06–1.32 (1.12, n = 10). Clypeus ( Figure 4G View Figure 4 ) with 4 pairs of setae. Palpus ( Figure 4H View Figure 4 ) pale; segment 3 slender with 2–3 subbasal capitate sensilla; PR 4.20–5.00 (4.63, n = 10).

Thorax. Scutum dark brown; scutellum paler with 7–8 large, 3–4 thinner setae. Legs pale brown; apex of hind tibia with 7 spines; foreleg TR 1.55–1.96 (1.69, n = 10), midleg TR 1.73–2.08 (1.82, n = 10), hind leg TR 1.66–1.89 (1.76, n = 10). Wing ( Figure 18E View Figure 18 ) length 0.99–1.23 (1.07, n = 10) mm, width 0.42–0.51 (0.47, n = 10) mm; CR 0.41–0.47 (0.43, n = 10); membrane slightly infuscated, densely covered with macrotrichia; radial cells obliterated or reduced to slender suture; cubital fork at level of anterior portion of second radial cell. Haltere pale brown, knob base whitish.

Abdomen. Pale brown. Subgenital plate ( Figure 4I View Figure 4 ) circular, with broad round lumen; posteromedian projection absent; posterolateral arms slender, gently recurved over 90°. Spermatheca ovoid ( Figure 4J View Figure 4 ), heavily sclerotized, measuring 60 × 48 µm, neck short, narrow, straight, measuring 12 µ.

Distribution ( Figure 21 View Figure 21 )

Argentina (Río Negro, Chubut)   .

Type material

Holotype male, allotype female, Argentina, Chubut prov., 60 km east Tecka , 20 February 1989, G. Spinelli, sweep net ( MLPA)   . Paratypes, 9 males, 15 females, as follows: same data as holotype   1 female ( MLPA)   . Río Negro prov., meseta de Somuncurá, 18 km south Pailemán , 10 December 2005, G. Spinelli   , 1 male ( MLPA)   ; Rincón de Comi-Co, 41°08′35.1″ S, 67°27′34.6″ W, 1000 m, 7 December 2006, G. Spinelli GoogleMaps   , 3 females, Malaise trap ( MLPA)   . Chubut prov., Comodoro Rivadavia , 12 January 1992, J. Muzón   , 1 male ( MLPA)   ; meseta de Sierra Cuadrada, estancia Don Eduardo , 1 December 1996, G. Spinelli   , 1 male, 4 females ( MLPA)   , 1 male ( BMNH)   , 1 male ( USNM)   , 1 male ( CNCI)   , at light; Telsen, arroyo Telsen , 42°28′35.2″ S, 66°52′18.0″ W, 24 February 2007, G. Cheli GoogleMaps   , 3 males, 4 females ( MLPA)   , 1 female ( BMNH)   , 1 female ( USNM)   , 1 female ( CNCI)   , at light.

Etymology

This species is named after the late British entomologist Alexander Ingram, in recognition of his pioneer work with Ceratopogonidae   of Patagonia that was co-authored by John William Scott Macfie.

Phylogenetic relationships

Dasyhelea ingrami   is the basal species of the clade containing the other species of the mutabilis   group and D. necrophila   .

USNM

Smithsonian Institution, National Museum of Natural History

CNCI

Canadian National Collection Insects