Simulium doipuiense Takaoka and Choochote, 2005

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 : 32

Simulium doipuiense Takaoka and Choochote, 2005 a (complex)

Simulium doipuiense consists of two cytoforms, A and B ( Tangkawanit et al. 2009). The morphological characters of S. doipuiense A agree with those of the original description of S. doipuiense ( Takaoka & Choochote 2005a), suggesting that cytoform A represents true S. doipuiense . The diagnostic characters of cytoform A are the presence in the pupa of microtubercles on the antennal sheaths ( Fig. 6 ), rounded cephalic microtubercles ( Fig. 4 A), gill filaments with short stalks, the stalk of the dorsal pair directed upward, and the thickness and length of the filaments slightly decreasing from dorsal to ventral ( Fig. 7 A); a pair of clustered medium long hairs on sternite VII of the female; and a nearly bare basal protuberance on the gonostylus of the male. The larvae, similar to those of S. manooni and S. rufibasis , have a reddish body. Simulium doipuiense B is known only as larvae, which are similar to those of S. doipuiense A, with slight numerical differences (Table 2). The postgenal cleft of cytoform B ( Fig. 3 B) can be similar to that of cytoform A or broader.

Figures

FIGURE 3. Postgenal clefts 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 F. G, S. tani cytoform G. H, S. weji. I, S. yuphae. J, Unknown species 2. Scale bars = 0.1 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 6. Antennal sheaths of pupae of Simulium tuberosum group from Thailand. A, S. doipuiense cytoform A. B, S. weji. Scale bars = 0.1 mm. Arrow indicates microtubercles.

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.