Stratiomys Geoffroy, 1762

Yatoo, Suhaib Firdous, Maqbool, Amir & Wachkoo, Aijaz Ahmad, 2023, A review of the genus Stratiomys Geoffroy (Diptera: Stratiomyidae) from India with description of a new species, European Journal of Taxonomy 910, pp. 1-13 : 4-11

Genus Stratiomys Geoffroy, 1762

Figs 2–5

Diagnosis

Among the Stratiomyini, the Asian species of the genus Stratiomys are characterized by having holoptic eyes in males, dichoptic ones in females; elongate scape, which is more than three times as long as the pedicel, and the cross section of the flagellomeres are round and not oval-shaped; scutellum is with two prominent straight or curved spines; vein R 2+3 arises distinctly beyond the anterior cross vein r-m; vein R 4 is present; medial veins (M) originate from the discal cell and curve anteriorly toward apex, ending before the wing margin ( Rozkošný 1973, 1982; Nagatomi 1977; Nerudová et al. 2007).

Key to the Indian species of Stratiomys Geoffroy, 1762

1. Eye distinctly hairy; scutellar spines straight or slightly incurved ( Fig. 2J ); wing slightly brownish towards middle region; tibiae mostly black; phallus distinctly longer than genital capsule, tripartite distally, medial lobe distinctly shorter and wider than outwardly divergent lateral lobes ( Fig. 2N–P ) ............................................................................................................... S. approximata Brunetti, 1923

– Eye bare; scutellar spines upcurved nearly perpendicular to the body axis ( Fig. 4J ); wing hyaline; tibiae mostly yellow ( Fig. 4C ); phallus slightly longer than genital capsule, tripartite and lobes dilated in distal third, distinctly narrowing in apical one third; lateral lobes slightly incurved, medial lobe straight and shorter than lateral lobes ( Fig. 4O–P ) ...................................... S. brunettii sp. nov.

Figures

Fig. 2. Stratiomys approximata Brunetti 1923, ♂ (CUZM S_Yatoo100007). A. Habitus, dorsal view. B. Habitus, lateral view. C. Habitus, ventral view. D. Head, frontal view. E. Head, lateral view. F. Head, dorsal view. G. Antenna. H. Thorax, lateral view. I. Thorax, dorsal view. J. Scutellum. K. Wing. L. Abdomen, dorsal view. M. Abdomen, lateral view. N. Epandrium, proctiger and cerci, dorsal view. O. Terminalia, dorsal view. P. Terminalia, ventral view. Abbreviations: cerc = cercus; epand = epandrium; goncx = gonocoxite; goncx apod = gonocoxal apodeme; gonst = gonostylus; lt lb = lateral lobe; md lb = medial lobe; ph = phallus; prct = proctiger; synst = synsternite. Scale bars: A–C = 1.0 mm; D–M = 0.5 mm; N–P = 0.1 mm.

Fig. 3. Stratiomys approximata Brunetti 1923, ♀ (CUZM S_Yatoo100009). A. Habitus, dorsal view. B. Habitus, lateral view. C. Habitus, ventral view. D. Head, frontal view. E. Head, lateral view. F. Head, dorsal view. G. Head, ventral view. H. Antenna.I. Thorax, dorsal view. J. Thorax, lateral view. K. Wing. L. Abdomen, lateral view. M. Abdomen, dorsal view. N. Terminalia, dorsal view. O. Genital fork, dorsal view. Abbreviations: cerc = cercus; go = genital opening; pb = posterior bridge; pp = posterolateral process; tg = tergite. Scale bars: A–C, K = 1.0 mm; D–J, L–M = 0.5 mm; N–O = 0.1 mm.

Fig. 4. Stratiomys brunettii sp. nov., paratype, ♂ (GCSI A_Wachkoo100045). A. Habitus, dorsal view. B. Habitus, lateral view. C. Habitus, ventral view. D. Head, frontal view. E. Head, lateral view. F. Head, dorsal view. G. Antennae. H. Thorax, lateral view. I. Thorax, dorsal view. J. Scutellum. K. Wing. L. Abdomen, dorsal view. M. Abdomen, lateral view. N. Epandrium, proctiger and cerci, dorsal view. O. Terminalia, dorsal view. P. Terminalia, ventral view. Abbreviations: cerc = cercus; epand = epandrium; goncx = gonocoxite; goncx apod = gonocoxal apodeme; gonst = gonostylus; lt lb = lateral lobe; md lb = medial lobe; ph = phallus; prct = proctiger; synst= synstenite. Scale bars: A–C = 1.0 mm; D–M = 0.5 mm; N–P = 0.1 mm.

Fig. 5. Stratiomys brunettii sp. nov., paratype, ♀ (CUZM S_Yatoo100013). A. Habitus, dorsal view. B. Habitus, lateral view. C. Habitus, ventral view. D. Head, frontal view. E. Head, lateral view. F. Head, dorsal view. G. Head, ventral view. H. Antenna.I. Thorax, dorsal view. J. Thorax, lateral view. K. Wing. L. Abdomen, lateral view. M. Abdomen, dorsal view. N. Terminalia, dorsal view. O. Genital fork, dorsal view. Abbreviations: cerc = cercus; go = genital opening; pb = posterior bridge; pp = posterolateral process; tg = tergite. Scale bars: A–C, K = 1.0 mm; D–J, L–M = 0.5 mm; N–O = 0.1 mm.