Simulium rufibasis Brunetti, 1911

Tangkawanit, Ubon, Kuvangkadilok, Chaliow, Baimai, Visut & Adler, Peter H., 2009, Morphotaxonomy of the Simulium (Simulium) tuberosum species group (Diptera: Simuliidae) in Thailand, Zootaxa 2048, pp. 31-46 : 36

Simulium rufibasis Brunetti, 1911

Simulium rufibasis is distinguished from other species in the Thai tuberosum group by having pupae with conical cephalic microtubercles ( Fig. 4 B) and gill filaments moderately stalked and decreasing slightly in thickness from dorsal to ventral ( Fig. 7 C), females with sternite VII bearing a pair of medium-long clustered hairs, and males with the median sclerite about as long as wide and nearly parallel sided ( Fig. 9 B). Further study is needed to determine if S. rufibasis in Thailand is conspecific with the type of S. rufibasis from West Bengal, India.

Figures

FIGURE 4. Cephalic plates of pupae of Simulium tuberosum group from Thailand, showing distribution of microtubercles. A, S. doipuiense cytoform A (male). B, S. rufibasis (male). C, S. setsukoae (female). D, S. weji (female). E, S. yuphae (female). Scale bars = 0.1 mm.

FIGURE 7. Gill filaments of Simulium tuberosum group from Thailand. A, S. doipuiense cytoform A. B, S. manooni. C, S. rufibasis. D, S. setsukoae. E, S. tani cytoform F. F, S. tani cytoform H. G, S. weji. H, S. yuphae. Arrow indicates pit-like organ.

FIGURE 9. Median sclerites of males of Simulium tuberosum group from Thailand. A, S. doipuiense cytoform A. B, S. rufibasis. C, S. setsukoae. D, S. tani complex. E, S. weji. F, S. yuphae. Scale bars = 0.05 mm.