Eosphaerophoria dentiscutellata ( Keiser, 1958 )

Mengual, Ximo & Ghorpadé, Kumar, 2010, The flower fly genus Eosphaerophoria Frey (Diptera, Syrphidae), ZooKeys 33 (33), pp. 39-80 : 55-58

Eosphaerophoria dentiscutellata ( Keiser, 1958)

Figs 33, 46; MorphBank [http://www.morphbank.net/?id=478078]

Tambavanna dentiscutellata Keiser, 1958: 202 . Type locality: Sri Lanka, Kandy, Deiyannewela. Holotype 1♁ [NMB, Basel]. Keiser, 1958: 202, Fig. 3 (habitus, head, wing).

Eosphaerophoria dentiscutellata Vockeroth, 1969: 135 (new combination, species misidentified from Vietnam); Knutson et al. 1975: 313 (catalog citation); Ghorpadé 1994: 5 (key reference, citation). Claussen and Weipert 2003: 354 (identification key).

Male. Head. Face straight, narrow becoming broader ventrally (about 1/20 of head width at antennal basis), with distinct round tubercle, yellow, yellow pilose; gena yel-

Figures 3Ι–36. Abdomen, dorsal view: 3Ι Eosphaerophoria symmetrica , male 32 E. hermosa , female 33 E. dentiscutellata , male 34 E. adornata , female 35 E. luteofasciata , male 36 E. nigrovittata , female.

low; lunula yellow; frons completely black on dorsal 1/4–1/3 (length between anterior ocellus and lunula), yellow on ventral 2/3–3/4, with frontal sulcus defining the dorsal completely black area, with few yellow and dark hairs; dichoptic; vertex and vertical triangle black, black pilose; ocelli brownish; antenna yellow, basoflagellomere brown dorsally, oval; arista brown; occiput mainly black, yellow ventrally, yellow pilose and silvery pollinose ventrally, black pilose and golden pollinose dorsally.

Thorax. Scutum mainly black, shiny medially, black pollinose laterally, yellow laterally with lateral broad yellow stripe from postpronotum to scutellum, narrower after transverse suture with ventral black area, golden brown pilose; postpronotum yellow; notopleuron yellow with distinct posterolateral obtuse protuberance; scutellum triangular, with a tooth on medial posterior margin, yellow with dorsomedial triangular black area continuing from posterior mesonotum, golden brown pilose; propleuron, anepisternum and anepimeron entirely yellow; katepisternum black with dorsal yellow macula; meron black; katepimeron yellow; katatergum mainly yellow, black posteriorly; calypter dark brown; halter yellowish. Wing. Wing bare basomedially.

Legs. Pro- and mesoleg entirely yellow, except probasitarsomere slightly brownish laterodorsally, and distal part of mesofemur and basal part of mesotibia slightly darker, yellow pilose except tarsi with short black setulae ventrolaterally; metacoxa and trochanter yellow, yellow pilose; metafemur yellow on basal 1/2, black on distal 1/2, yellow and brown pilose, with 2 ventral rows (anteroventral and posteroventrally) of short strong black spine-like setulae on the apical 2/3; metatibia black, golden brown pilose; metatarsus black, golden yellow and brown pilose.

Abdomen. Fig. 33. Dorsum mainly black, black pilose except 1st tergum and anteriorly 2nd tergum yellow pilose laterally; 1st tergum black with anterior and lateral yellow margin, medially reaching the anterior margin of 2nd tergum dividing the black area in 2 triangular maculae; 2nd tergum black dorsally, narrowly yellow laterally on basal 3/4 continuing the yellow margin of 1st tergum; 3rd tergum black with basomedial very narrow black fascia not reaching margins and with basal yellow fascia, about 1/4–1/3 of tergum length, becoming broader medially and ending in a posteriorly pointed emargination at medial point, yellow on anterior 3/5 of lateral margin; 4th tergum black with basal yellow fascia slightly broader, about 1/3–1/2 of tergum length, produced posteriorly in a small triangular emargination, yellow on anterior 1/2 of lateral margin; 5th tergum black with 2 lateral small rounded yellow maculae on basal 1/3; 6th tergum black, yellow laterally; 7th tergum yellow; 8th tergum yellow with medial black macula; sterna yellow, yellow pilose except 4th sternum with some long thin black hairs medially and genital segments brown pilose; 3rd sternum with posterior margin slightly produced medially with black setulae; 4th sternum with posterior margin produced medially into 2 projections with black setulae; male genitalia as figured ( Fig. 46 ).

Female. Unknown.

Type locality. SRI LANKA: Central Province, Kandy, Deiyannewela. 7°17'7.10"N 80°37'54.71"E.

Type. Holotype: “ CEYLON C.P. // Kandy // Deiyannewela // 17.X. 53F. Keiser ” “ TYPUS ” “ Tambavanna denstiscutellata ” [handwritten] “ HOLOTYPE // Eosphaerophoria // dentiscutellata // det. X. Mengual 2009 ” [red, second and third lines handwritten] USNM ENT00036542 [1♁, NMB].

Length (1): body, 5.5 mm; wing, 4.1 mm.

Distribution: Sri Lanka.

Differential diagnosis. Species characterized by a medial tooth in the posterior margin of the scutellum, like E. adornata and E. hermosa (see comments above). Eosphaerophoria dentiscutellata differs from E. hermosa in having a medial black facial vitta, and from E. adornata in having 2nd tergum black with lateral margin yellow and 5th tergum with two lateral yellow maculae (see Figs 13 and 14). Its male genitalia is similar similar to the genitalia of E. vietnamensis , both with asymmetrical superior

Figures 37–43. Abdomen, dorsal view: 37 Eosphaerophoria bifida , male 38 E. brunettii , male 39 E. marginata , male 40 E. marginata , paralectotype female 4Ι E. marginata , Thailand female 42 E. vietnamensis , male 43 E. vietnamensis , female.

lobes like in E. marginata , but E. dentiscutellata has superior lobe slightly larger and different surstylus shape (see Figs 46 , 48 , 50 ).

Figures

Figure 46. Eosphaerophoria dentiscutellata, male genitalia a left lateral view b right superior lobe, lateral view c right superior lobe, dorsal view d left superior lobe, dorsal view e tergite 9, cerci and surstyli, dorsal view.

Figure 48. Eosphaerophoria marginata, male genitalia a left lateral view b sternite 9, superior lobes and aedeagus, right lateral view c left and right superior lobes, lateral view, outline only d left surstylus, dorsal view e sternite 9, superior lobes and aedeagus, ventral view (adapted from Vockeroth 1969).

Figure 50. Eosphaerophoria vietnamensis, male genitalia a left lateral view b right superior lobe, lateral view c right superior lobe, dorsal view d left superior lobe, dorsal view e tergite 9, cerci and surstyli, dorsal view.