Paracricotopus tamabrevis (Sasa et Suzuki)

Fu, Yue, Saether, Ole A. & Wang, Xinhua, 2012, A review of Paratrichocladius Santos Abreu from the Sino-Indian Region (Diptera: Chironomidae: Orthocladiinae), Zootaxa 3478, pp. 453-482 : 479-480

Paracricotopus tamabrevis (Sasa et Suzuki)

( Fig. 16 A–C)

Paratrichocladius tamabrevis Sasa et Suzuki, 1983: 74 .

Paracricotopus tamabrevis (Sasa et Suzuki) ; Niitsuma 1990: 97. Paratrichocladius gotoefeus Sasa et Suzuki, 2000b: 154 ; Yamamoto 2004: 73. Paracricotopus gotoefeus (Sasa et Suzuki) , comb. n., syn. n.

Material examined. JAPAN: Kyushu, Nagasaki Prefecture, Goto Islands, Wani River, holotype male of P. gotoefeus , 28. xi. 1999, H. Suzuki (No. 394: 29).

Diagnostic characters. AR 0.3; humeral pit small and indistinct; inferior volsella rounded and broad, with some strong setae on the margin; and gonostylus with a triangular crista dorsalis.

Additions to description. Anal point present, 35 µm long, basal wide 15 µm, peak wide 3 µm, with 1 long lateral setae on each side (absent in original description). Total length / wing length 2.1. Wing length / length of profemur 2.3. AR only 0.3. Tentorium 158 µm long, 35 µm wide. Dorsocentrals 12. Costal extension 45 µm long. Palpomeres length (in µm): 33, 55, 100, 130, 218. Palpomere 2 ellipsoid, 3 and 4 rectangular, 5 long and slender, Palpomeres 5/3: 2.2. Laterosternite IX with 4 long setae. Transverse sternapodeme 85 µm long, with weak oral projections. Inferior volsella rounded and developed. Gonocoxite 213 µm long. Gonostylus 95 µm long, with a triangular crista dorsalis. Megaseta 12 µm long. HR 2.2, HV 3.2. The wing and hypopygium of holotype are redrawn as in Fig. 15 A–C (In fact, anal point folded in the holotype).

Distribution. The species is known from Japan only.

Remarks. Due to the presence of an anal point (it is folded upwards and may be a bit hard to see); eye without dorsomedian extension; and wing with typical Paracricotopus venation, this species should be transferred to the genus Paracricotopus Thienemann et Harnisch. The characters are almost identical to those of P. tamabrevis according to the original description and the redescription by Niitsuma (1990). We did not examine the holotype of P. tamabrevis ( Sasa 1983; Yamamoto 2004), however, the redescription by Niitsuma is quite complete.

Figures

FIGURE 15. Paratrichocladius yakukeleus Sasa et Suzuki, male. A— Wing. B— Hypopygium, dorsal view. C— Hypopygium, ventral view.

FIGURE 16. Paracricotopus tamabrevis (Sasa et Suzuki), male. [Holotype of Paracricotopus gotoefeus (Sasa et Suzuki) comb. n.]. A— Wing. B— Hypopygium, dorsal view. C— Hypopygium, ventral view.