Rheotanytarsus rivulophilus Kawai et Sasa

Kobayashi, Tadashi & Endo, Kazuo, 2008, Synonymic notes on some species of Chironomidae (Diptera) described by Dr. M. Sasa (†), Zootaxa 1712, pp. 49-64 : 61

Rheotanytarsus rivulophilus Kawai et Sasa

( Fig. 38 )

Rheotanytarsus rivulophilus Kawai et Sasa, 1985: 21 , Fig. 7 .

Tanytarsus ginzanquartus Sasa et Suzuki, 1998: 16 –17, Fig. A8. [Holotype 347: 048.] Syn. nov.

Tanytarsus ginzanquartus has the gonostylus abruptly tapered in apical half, the anal point without patches of short spines between the anal crests, and the median volsella with lamelliform setae. These characters indicate that T. ginzanquartus should be transferred to the genus Rheotanytarsus Thienemann et Bause. The elongate lamelliform setae of median volsella are curved medially and extend well beyond the apex of inferior volsella ( Fig. 38 ), similar to those of R. rivulophilus Kawai et Sasa.

Figures

FIGURES 32 – 38. Male holotypes of Chironominae. 32. Harnischia sibabecea Sasa, Sumita et Suzuki, 1999 [= Harnischia ohmuraensis Kobayashi et Suzuki, 1999], anal point. 33 – 35 • Prochironomus irioheius Sasa et Suzuki, 2000 [= Paratendipes nigrofasciatus Kieffer, 1916], hypopygium (33), median volsella (34), wing (35). 36. Polypedilum daitoneoum Sasa et Suzuki, 2001 [= Polypedilum nubifer (Skuse, 1889)], hypopygium. 37. Polypedilum chubetuabeum Sasa et Suzuki, 2001 [= Polypedilum tsukubaense (Sasa, 1979)], superior volsella. 38. Tanytarsus ginzanquartus Sasa et Suzuki, 1998 [= Rheotanytarsus rivulophilus Kawai et Sasa, 1985], hypopygium. Scale lines: 100 μm (34, 36, 38); 50 μm (32 – 33, 35, 37).

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).