Dasyhelea (Dicryptoscena) gothlandica, Strandberg & Johanson, 2015

Strandberg, Jonas & Johanson, Kjell Arne, 2015, New records of Dasyhelea Kieffer, 1911 from Sweden, with descriptions of two new species (Diptera: Ceratopogonidae), European Journal of Taxonomy 131, pp. 1-22 : 12-16

publication ID	https://doi.org/ 10.5852/ejt.2015.131
DOI	https://doi.org/10.5281/zenodo.3794739
persistent identifier	https://treatment.plazi.org/id/85592A26-EF79-FF9B-E082-FB9FA045FBCA
treatment provided by	Carolina
scientific name	Dasyhelea (Dicryptoscena) gothlandica
status	sp. nov.

Treatment

Dasyhelea (Dicryptoscena) gothlandica View in CoL sp. nov.

urn:lsid:zoobank.org:act:5FCC2057-325D-4EFF-B0F9-0C660A747422

Figs 12–32 View Figs 12–18 View Figs19–22 View Figs 23–29 View Figs 30–32

Diagnosis

The male genitalia of this species are characteristic in having the posterior margin of sternite 9 with a pair of processes apically separated by a shallow furrow. Gonostyli short, tapering to an indented sharp point. The aedeagus has broad apicolateral processes, and the posterior process of the paramere has fine hairs apically.

Etymology

Gothlandica refers to Gotland, a calcareous island located in the Baltic Sea east of mainland Sweden, where the holotype was collected.

Type material

Holotype

SWEDEN: ♂, Gotland, Bästeträsk , 57.899383° N, 18.901083° E, 9 masl, Malaise trap, 28 May–12 Jun. 2011, leg. B. Eklund ( NHRS) (DNA voucher: 4BA).

GoogleMaps

Paratypes

SWEDEN: 2 ♂♂, 2 ♀♀, same data as holotype; 1 ♂, Gotland, Horsan, 57.865883° N, 18.846350° E, 4 masl, Malaise trap, 10–25 Jul. 2011, leg. B. Eklund ( NHRS); 1 ♂, 2 ♀♀, Gotland, Bästeträsk, 57.899383° N, 18.901083° E, 9 masl, sweep net, 3 Jul. 2011, leg. J. Strandberg ( NHRS) (DNA voucher: 6AW).

Description

Male

HEAD ( Figs 12–16 View Figs 12–18 ). Antennal flagellum length 727 μm (687–727 μm, n = 4); AR 1.06 (0.97–1.19, n = 4) ( Fig. 13 View Figs 12–18 ). Frontal sclerite elliptical ( Fig. 14 View Figs 12–18 ). Clypeus entire, with 8 (6–8, n = 4) long setae ( Fig. 15 View Figs 12–18 ). Palp segment 3 slender, 90 μm (85–91 μm, n = 4); PR (III) 6.6 (6.3, n = 4) ( Fig. 16 View Figs 12–18 ); first half with hyaline sensillae on inner surface.

THORAX ( Figs 17–18 View Figs 12–18 ). Scutellum pale, with 10 bristles (9–10, n = 4). Wing length 1.15 (1.08–1.17 mm, n = 4); CR 0.45 (0.46–048, n = 4); macrotrichia numerous ( Fig. 17 View Figs 12–18 ); first radial cell slit-like, second cell open ( Fig. 18 View Figs 12–18 ). Legs light brown, tarsi paler.

GENITALIA ( Figs 19–22 View Figs19–22 ). Apicolateral process of tergite 9 short. Posterior margin of sternite 9 apically divided into pair of obtuse projections. Gonostylus short, tapering to indented sharp point, covered by small setae, two long bristles at midpoint present ( Figs 19–20 View Figs19–22 ). Parameres asymmetrical; posterior process fused with right arm; long and slender, distinctly bent apically, with fine apical hairs ( Fig. 21 View Figs19–22 ). Aedeagus low arched with apicolateral processes broad, somewhat folded, extended laterally in distal part ( Fig. 22 View Figs19–22 ).

Female

HEAD ( Figs 23–27 View Figs 23–29 ). Antennal flagellum length 545 μm (444–525, n = 3); distal flagellomeres elongate; AR 0.96 (0.86–1.0, n = 3) ( Fig. 24 View Figs 23–29 ). Clypeus entire, with 8 (n = 3) long setae ( Fig. 25 View Figs 23–29 ). Frontal sclerite elliptical ( Fig. 26 View Figs 23–29 ). Palp segment 3 slender, 80 μm (80 μm, n = 4); PR (III) 5.6 (5.3, n = 3) ( Fig. 27 View Figs 23–29 ); with hyaline sensillae at basal part of inner surface.

THORAX ( Figs 28–29 View Figs 23–29 ). Scutellum pale, with 8 bristles (9–10, n = 3). Wing length 1.1 mm (1.05–1.13, n = 3); CR 0.46 (0.44–0.47, n = 3) ( Fig. 28 View Figs 23–29 ). First radial cell slit-like, second cell open but small ( Fig. 29 View Figs 23–29 ). Legs as in male.

GENITALIA ( Figs 30–32 View Figs 30–32 ). Subgenital plate with notum separated from ramus, slightly fragmented ( Figs 30–31 View Figs 30–32 ). Spermatheca single; ovoid-shaped with short neck; length × width: 60 × 40 μm (60 × 40 μm, n = 3) ( Fig. 32 View Figs 30–32 ).

Remarks

This species is a member of the subgenus Dicryptoscena , and the male is similar to that of Dasyhelea albidipes Santos Abreu, 1918 in the morphology of the genitalia, particularly by the presence of a pair of processes on the posterior margin of sternite 9. D. gothlandica sp. nov. differs from D. albidipes by the broadly shaped apicolateral processes and the short gonostyli.

Biology

The holotype was collected in a Malaise trap next to Lake Bästeträsk, with sourrounding vegetation consisting of Pinus sylvestris Linnaeus and small shrubs. One of the male paratypes was collected in a Malaise trap next to Lake Horsan, approximatley 5 km south-east of Bästeträsk.