Strongylophthalmyia hauseri Evenhuis

Evenhuis, Neal L., 2016, World review of the genus Strongylophthalmyia Heller (Diptera: Strongylophthalmyiidae). Part I: Introduction, morphology, species groups, and review of the Strongylophthalmyia punctata subgroup, Zootaxa 4189 (2), pp. 201-243 : 218-219

publication ID 10.11646/zootaxa.4189.2.1

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Strongylophthalmyia hauseri Evenhuis


Strongylophthalmyia hauseri Evenhuis , n. sp. ( Figs. 14 View FIGURES 10 – 17 , 22 View FIGURES 18 – 25 , 38 View FIGURES 38 – 41 , 64 View FIGURES 62 – 69 )

Diagnosis. This species is a member of the complex of species characterized by an S-shaped or strongly curved dorsal antennal process, which includes S. albisternum , n. sp., S. pappi , n. sp., S. punctata , and S. spinosa . It can be easily distinguished from them based on the modified male palpus that is widened and bilobed apically (the palpus not bilobed in the other species in this complex).

Description. Lengths. Ƌ: body, 4.1–5.6 mm; wing, 3.3–4.5 mm. Male. Head: globular, frons shining black, brown at ptilinal suture; face yellow; gena yellow with brown margin, silvery pollinose, row of short black hairs ventrally; occiput black; clypeus thin, brown; palpus ( Fig. 14 View FIGURES 10 – 17 ) subtriangular, slightly bilobed, rounded apically, length slightly longer than width, yellowish with row of stiff black hairs ventrally, white hairs apically; proboscis black.

Antenna ( Fig. 22 View FIGURES 18 – 25 ): scape and pedicel yellow; flagellomere subrhomboid, rounded apically, longer than wide, brown with yellow basally, clothed with white hairs, with long, slender, sinuous black dorsal process densely clothed with white hairs, 2.5 times length of flagellomere; arista slightly shorter than dorsal process, styliform, bare.

Thorax ( Fig. 38 View FIGURES 38 – 41 ): shining; mesonotum and scutellum shining black, sparsely clothed with short hair-like setulae; propleuron yellow, remaining pleura black; anepisternum with tuft of silvery white hairs medially, a few minute white hairs along prealar suture; katepisternum with white hairs ventrally near mid coxa.

Wing: hyaline with tinge of brown at apex as a result of dense microtrichia; vein R2+3 nearly straight, ending in costa beyond level of crossvein dm-cu; crossvein r-m before middle of cell dm; veins R4+5 and M1+2 parallel distally; crossvein dm-cu sloping toward CuA1; halter white.

Legs: fore coxa yellow, mid and hind coxae brown; fore coxa with four strong black hairs subapically; fore femur ( Fig. 64 View FIGURES 62 – 69 ) yellowish brown, dorsally with 4–5 short black thorn-like spicules; mid femur yellow anteriorly, brown posteriorly; hind femur yellow on basal one-fourth, brown on apical three-fourths; fore tibia yellow; mid tibia yellowish brown, hind tibiae brown; tarsi white, hind basitarsus longer, subequal to length of tarsal segments II–V combined.

Abdomen: dark brown to black, tergites with short sparse brown hairs.

Male genitalia. Not dissected; epandrium and surstylus shining black, with brown hairs; cerci light brown, narrow basally, flared and rounded apically, with long white hairs dorsally, shorter black hairs apically and ventrally

Female. Unknown.

Material examined. Holotype ♂ and 6♂ paratypes from VIETNAM: Vinh Phuc Province: Tam Dao , 21°27'52"N, 105°38'46"E, 1200 m, 19–22 Jun 2014, hand collected, M. Hauser, N. von Ellenreider ( CSCA) GoogleMaps . Other paratypes: THAILAND: Chiang Mai Province: 12♂ , Chiang Mai, botanical garden, QSBG, 18.9855°N, 98.8636°E, 11–25 Jul 2013, M. Hauser ( QSBG, CSCA, BPBM) GoogleMaps . VIETNAM: Bac Giang: An Lac, Khe Ro forest , 21°20'26"N, 106°58'0"E, 75–150 m, 16–18 May 2013, S.A. Marshall & S. Paiero, debu00360343 ( DEBU) GoogleMaps . Holotype deposited in the California State Collection of Arthropods, Sacramento . Paratypes in CSCA, BPBM, and DEBU.

Distribution. Thailand, Vietnam.

Etymology. This species is named for my friend and colleague, Martin Hauser, who helped collect the holotype and has provided me with excellent specimens for study that he has collected around the world.


California State Collection of Arthropods


Bishop Museum


Ontario Insect Collection, University of Guelph

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