Strongylophthalmyia immaculata Hennig

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: 219-223

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Strongylophthalmyia immaculata Hennig


Strongylophthalmyia immaculata Hennig  

( Figs. 23 View FIGURES 18 – 25 , 54 View FIGURES 54 – 61 , 65 View FIGURES 62 – 69 )

Strongylophthalmyia immaculata Hennig 1940: 309   ; 1941a: 136. Frey 1956: 129. Steyskal 1971: 144; 1977: 22. Evenhuis 1989: 472. Yang & Wang 1998: 459. Papp 2005: 195. Iwasa & Evenhuis 2014: 103.

Diagnosis. Strongylophthalmyia immaculata   is similar in appearance to S. palpalis   and S. sumatrana   , n. sp. on the basis of the yellowish to reddish brown thorax, but it can easily be distinguished from those two by the nonmodified male palpus (bacilliform in S. immaculata   ; flared apically in S. sumatrana   , n. sp.; spherical in S. palpalis   ).

Redescription. Lengths [from single examined male]. Ƌ: body, 2.2 mm; wing, 2.0 mm. Male. Head: globular, frons shining brown above ocellar tubercle, yellow below ocellar tubercle to ptilinal suture; face yellowish white; gena yellowish white, silvery pollinose, row of short white hairs ventrally; occiput brown, yellow posteroventrally; clypeus thin, white; palpus bacilliform, grayish brown, with white hairs ventrally, single long white seta apically; proboscis brown.

Antenna ( Fig. 23 View FIGURES 18 – 25 ) yellow; flagellomere subspherical, clothed with white hairs, with barely perceptible minute dorsal process located just anterior to base of arista; arista two times length of flagellomere, styliform, bare.

Thorax: shining; mesonotum and scutellum brown dorsally, mesonotum yellowish laterally, with numerous brown short hair-like setulae; pleura yellow, katepisternum with white hairs ventrally near mid coxa.

Wing: hyaline; vein R2+3 nearly straight, ending in costa at level of crossvein dm-cu; crossvein r-m at basal onethird of cell dm; veins R4+5 and M1+2 slightly converging distally; halter white.

WIP ( Fig. 54 View FIGURES 54 – 61 ). Generally brassy colored throughout; a thin band of magenta along costa in cell r2+3; cell r1 greenish; anal lobe with subbasal spot of blue surrounded by thin band of magenta.

Legs: yellow; fore coxa with 1–2 long yellowish white hairs; fore femur ( Fig. 65 View FIGURES 62 – 69 ) dorsally with 6 short to minute black thorn-like spicules in wavy row, ventrally with subbasal thorn-like cluster of stiff yellowish setae; hind femur with minute knob-like protuberance basomesally; tarsi white.

Abdomen: tergites I –II yellowish to tan, weakly sclerotized medially and laterally; tergites III –VI dark brown, with short sparse yellowish hairs, darker yellow to brown hairs laterally; sternites brown.

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

Material examined: TAIWAN: 1♂, 25 km east of Chiayi [23.456910°N, 120.765077°E], 700 m, 9 Oct 1993, A. Freidberg ( TAU). GoogleMaps  

Remarks. The holotype male and 10 paratype females were described by Hennig (1940) from Toa Tsui Kutsu [= Dongya Cui Da; 22.901815°N, 121.196501°E] and collected along with S. punctata   , S. trifasciata   , and S. crinita   . The holotype male was not available during this study, but a specimen in TAU determined by Shatalkin as S. immaculata   matches the salient characters in Hennig’s description so I am confident of its placement in this subgroup. Although Hennig (1940) described 10 paratype females of S. immaculata   , unless they were collected in copula, there is no sure way of associating females with males of this species. They are tentatively left here as paratypes of S. immaculata   , but further study may show them to be females of another species.

Distribution: Taiwan.


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Strongylophthalmyia immaculata Hennig

Evenhuis, Neal L. 2016

Strongylophthalmyia immaculata

Iwasa 2014: 103
Papp 2005: 195
Yang 1998: 459
Evenhuis 1989: 472
Steyskal 1971: 144
Frey 1956: 129
Hennig 1940: 309