Diamesa sunabacedea (Tanaka et Sasa) Tanaka et Sasa, 2008

Kobayashi, Tadashi & Endo, Kazuo, 2008, Synonymic notes on some species of Chironomidae (Diptera) described by Dr. M. Sasa (†), Zootaxa 1712, pp. 49-64 : 56

Diamesa sunabacedea (Tanaka et Sasa) , comb. nov.

( Figs. 24–25 )

Diamesa sunabacedea (Tanaka et Sasa, 2001: 45, Fig. 3 a–j) (as Pseudodiamesa ). [Holotype 350: 024.]

In the description of Pseudodiamesa sunabacedea, Tanaka and Sasa (2001) erroneously stated that tarsomere IV is cylindrical. Actually, it is cordiform. Based on the shape of tarsomere IV, presence of inner verticals, and the structure of the hypopygium, the species undoubtedly belongs in Diamesa Meigen.

Diamesa sunabacedea is very similar to D. insidiosa described by Serra-Tosio (1983) from Nepal, particularly in the shape of the hypopygium ( Figs. 24–25 ). However, D. sunabacedea has a higher antennal ratio and there are minor differences in the shape of the sternapodeme, basal plate and medial field, which apparently render the two species distinct.

Figures

FIGURES 13 – 26. Male holotypes of Tanypodinae (13 – 22) and Diamesinae (23 – 26). 13 – 14. Zavrelimyia inaveua Sasa, Kitami et Suzuki, 2001 [= Tanypus punctipennis Meigen, 1818], scutal tubercle in dorsal view (13), mid tibial spurs (14). 15 – 18. Trissopelopia oyabetrispinosa Sasa, Kawai et Ueno, 1988 [= Trissopelopia longimana (Staeger, 1839)], hypopygium (15), fore tibial spur (16), mid tibial spurs (17), hind tibial spurs (18). 19 – 22. Zavrelimyia tusimuheia (Sasa et Suzuki, 1999), comb. nov., hypopygium (19), fore tibial spur (20), mid tibial spurs (21), hind tibial spurs (22). 23. Diamesa kurobedistalis Sasa et Okazawa, 1992 [= Diamesa alpina Tokunaga, 1936], hypopygium. 24 – 25. Diamesa sunabacedea (Tanaka et Sasa, 2001), comb. nov., hypopygium (24), anal point (25). 26. Potthastia togabicolis Sasa et Okazawa, 1992 [= Potthastia gaedii (Meigen, 1838)], hypopygium. Scale lines: 100 μm (13, 15, 19, 23 – 26); 50 μm (14, 16 – 18, 20 – 22).

FIGURES 1 – 12. Male holotypes of Tanypodinae. 1 – 2. Denopelopia irioquerea (Sasa et Suzuki, 2000), comb. nov., hypopygium (1), scale-like setae of fore tibia (2). 3 – 4. Zavrelimyia inawaquerea Sasa, Kitami et Suzuki, 2000 [= Natarsia tokunagai (Fittkau, 1962)], wing (3), mid tibial spurs (4). 5 – 6. Krenopelopia yunouresia Sasa, 1989 [= Paramerina divisa (Walker, 1856)], hypopygium (5), hind tibial spurs (6). 7 – 8. Paramerina okimaculata Sasa, 1990, hypopygium (7), mid tibial spurs (8). 9 – 10. Krenopelopia togatibea Sasa et Okazawa, 1992 [= Psectrotanypus orientalis Fittkau, 1962], hypopygium (9), mid tibial spurs (10). 11 – 12. Krenopelopia joganflava Sasa et Okazawa, 1991 [= Rheopelopia ornata (Meigen, 1838)], hypopygium (11), mid tibial spurs (12). Scale lines: 1000 μm (3); 100 μm (1, 5, 7, 9, 11); 50 μm (2, 4, 6, 8, 10, 12).