Eurygarka cyphostylus Curler

Curler, Gregory R. & Moulton, John K., 2008, A review of the Nearctic species of the genus Eurygarka Quate (Diptera: Psychodidae), Zootaxa 1740, pp. 28-36 : 32

Eurygarka cyphostylus Curler n. sp.

( Figs. 1–6 )

Diagnosis. Larva: Unknown. Pupa: Unknown. Adult: Male eye bridge contiguous. Female eye bridge divided by less than 1 facet diameter. Male ascoids: medial anterior branches with 7, and lateral anterior branches with 6 longitudinal veins. Male terminalia: gonocoxites with a posteromedial lobe bearing 6 setiform sensilla; gonostyles tapering progressively from base to apex, with apices bent approximately 45° medially, aedeagus acuminate apically; sternal bridge transverse, slightly arcuate; ventral extensions of parameres acuminate, terminating at same point as aedeagus; cercopods tapered from base to apex, retinacula length greater than 1/2 length of cercopod. Female terminalia: hypovalvae digitiform, with apex subquadrate.

Description. Larva Unknown.

Pupa Unknown.

Adult Male ( Figs. 1–4 ): Measurements, (N = 10) head width 0.38 (0.33–0.40) mm, head length 0.35 (0.30–0.37) mm, wing length 1.55 (1.33–1.70) mm, wing width 0.64 (0.55–0.70) mm, palpomere proportion: 1–1.5–2.1–2.4. Eye bridge contiguous. Frontal scar patch subquadrate anteriorly, bilobed posteriorly, without median spur. Antennal flagellum typical of Eurygarka ; Ascoids: medial anterior branches with 7, and lateral anterior branches with 6 longitudinal veins. Palpi with palpomeres of subequal width. Mouthparts with labellum bulbous. Wing: medial fork placed slightly basal to radial fork, both arising basal to apex of CuA2; M2 weakened at base. Terminalia: gonocoxites with a posteromedial lobe bearing 6 setiform sensilla; gonostyles tapering progressively from base to apex, with apices curved approximately 45° medially. Aedeagus acuminate apically; sternal bridge transverse, slightly arcuate; ventral extensions of parameres acuminate, terminating at same point as aedeagus; cercopods tapered from base to apex, retinacula length greater than 1/2 length of cercopod.

Adult Female ( Figs. 5–6 ): Eyebridge divided by less than 1 facet diameter. Frontal scar patch as in male. Antenna typical of Eurygarka . Palpi typical of Eurygarka . Mouthparts as in male. Wing venation as in male, but with 2 breaks at base of costa. Terminalia: Cerci slightly longer than broad. Subgenital plate with hypovalvae digitiform, with apex subquadrate.

Type material. Holotype [adult male]: U.S.A. TENNESSEE: Union Co: property of R.S. Donahoo, 36°10’N 83°52’W, 23.viii.2006, coll. G.R. Curler, CDC trap; deposited USNM. Specimen dissected, mounted on micro-slide. Allotype [adult female]: TENNESSEE: Knox Co: patio at 2705 W. Glenwood Ave., Knoxville, 35°59’N 83°56’W, 10.ix.2005, coll. G.R. Curler, resting on wall; deposited USNM. Specimen dissected, mounted on micro-slide. Paratypes: same locality as holotype, 21.viii.2006 [4 adult male (slides)], coll. G.R. Curler; same data as holotype [6 adult male (slides)] coll. G.R. Curler; TENNESSEE: Knox Co: 1137 Winterberry Ln., W. Knoxville, 35º55N 84º08’W, 30.vi.2007 [1 adult female (slide)], coll. J.K. Moulton; 10.vii.2007 [1 adult male (slide)], coll. G.R. Curler and J.K. Moulton; SOUTH CAROLINA: Richland Co: Riverbanks Zoo & Botanical Gardens, 34°00’N 81°04’W, 22.viii.2006, coll. M.P. Nelder, Fay-Prince UV trap. Paratypes deposited in USNM, and UTK.

Other material examined. U.S.A. Same location and collector as holotype, 21.viii.2006 [7 adult male]; 23.viii.2006 [5 adult male]; SOUTH CAROLINA: Richland Co: Riverbanks Zoo & Botanical Gardens, 34°00’N 81°04’W, 22.vi.2007, coll. M.P. Nelder, Fay-Prince UV trap.

Etymology. From the Greek cypho, meaning "bent", in reference to the shape of the gonostyles.

Distribution. Collected from several locations in eastern Tennessee, and two locations in South Carolina.

Remarks. Adults of E. cyphostylus can be easily distinguished by the shape of the gonostyles, parameres and aedeagus in the male, and the shape of the subgenital plate in the female.

Figures

FIGURES 1 – 6. Eurygarka cyphostylus Curler n. sp. 1. Male head, frontal view. 2. Wing. 3. Male antennal flagellomere 8 with ascoids, right antenna, frontal view. 4. Male terminalia, dorsal view. 5. Female left palpus, frontal view. 6. Female terminalia, ventral view. Scale bars = 0.25 mm (1), 0.5 mm (2, 5 – 6), 0.1 mm (4), 0.05 mm (3). (abbreviations: gcx = gonocoxite; gst = gonostyle; pm = paramere; aed = aedeagus; cpod = cercopod; tgX = tergite X; ret = retinacula; hpv = hypovalvae; sgp = subgenital plate; gdct = genital duct; ldct = larviduct).