Simulium setsukoae Takaoka and Choochote, 2004

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 : 37

Simulium setsukoae Takaoka and Choochote, 2004 a

This species is recognized by the dark gray to grayish brown larvae ( Fig. 1 C) with a diffuse brown area posterolaterally on the head capsule ( Fig. 2 E); pupae without microtubercles on the antennal sheaths, rounded cephalic microtubercles ( Fig. 4 C), narrow gill filaments decreasing in thickness from dorsal to ventral, and gill stalks decreasing slightly in length from dorsal to ventral ( Fig. 7 D); females with sternite VII bearing short clusters of hairs; and males with a teardrop-shaped median sclerite ( Fig. 9 C) and about 20 upper ommatidia per column in the compound eye.

Figures

FIGURE 1. Larvae of Simulium tuberosum group from Thailand. A, S. doipuiense cytoform A. B, S. rufibasis. C, S. setsukoae. D, S. tani cytoform C. E, S. weji. F, S. yuphae. Scale bars = 1.0 mm.

FIGURE 2. Head capsules of mature larvae of Simulium tuberosum group from Thailand. A, S. doipuiense cytoform A. B, S. doipuiense cytoform B. C, S. manooni. D, S. rufibasis. E, S. setsukoae. F, S. tani cytoform D. G, S. weji. H, S. yuphae. I, Unknown species 2. Scale bars = 0.5 mm.

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.