Chironomus sulfurosus Yamamotyo, 1990This is the same Bin as C. fusciceps, which has 99.83% homology (if both species accurately identified). (based on Yamamoto 1990) Wing length 2.3-2.6 mm, width 0.7-0.8 mm; VR 0.91 (0.90-0.93). AR about 2.69 (2.54-2.92), LR 1.42 (1.32-1.52). Head: Frontal tubercles 12.5-32.5 µm long, about 1.2-2 times longer than wide. Clypeus with 30-39 setae. Mean palpal lengths (micron): 52 : 60 : 180 : 182 : 234, P5/P4 - 1.29, P5/P3 - 1.30. Leg proportions (micron):
About 2-11 setae in individual pale areas at middle of tergite IX. Genitalia: Superior volsella of S-type; Inferior volsella slightly curved outwards, longer than the anal point and reaching about to the middle of the Gonostylus, which is relatively swollen, narrowing over posterior third. Female:Coloration almost the same as C. fusciceps female. Wing length 2.5-2.9 mm, width 0.8-1.0 mm, VR 0.88 (0.84-0.89). Squama with 16-28 setae. Leg proportions (micron):
Fourth instar larva: A small (length 8-12 mm) essentially melanotus-type larva, but sometimes posterior pair of ventral tubules tending to curl up. Lateral tubules short and slender. Anal setae of procercus fused into a single stout bristle. Anal tubules relatively stout, ventral pair longer than the dorsal pair. Head capsule orange-yellow, gula not pigmented. |