A new species of Caladomyia Säwedal, 1981, with description of the female and immature stages (Insecta, Diptera, Chironomidae) Susana Trivinho-Strixino & Giovanni Strixino Trivinho-Strixino, S. & G. Strixino (2000): A new species of Caladomyia Säwedal, 1981, with description of the female and immature stages (Insecta, Diptera, Chi-ronomidae). -In: Baehr, M. & M. Spies (eds): Contributions to chironomid research in memory of Dr. Friedrich Reiss. -Spixiana 23/2: 167-173. The immatures and adults of Caladomyia frieden, spec. nov. are described from the southeast of Brazil. Characterizations of the larva and adult female are the first for the genus. The larvae live on the aquatic macrophyte Mayaca fluviatilis Aublet. Phenology Information about adults and larvae is presented. Susana Trivinho-Strixino, Giovanni Strixino, Laboratörio de Entomologia Aquätica, Universidade Federal de Säo Carlos, C. P. 676; 13560-905 Säo Carlos SP, Brazil. E-mail:
[email protected] Introduction The genus Caladomyia was erected by Säwedal (1981) from material coUected by E. J. Fittkau and F. Reiss in the Amazon area. Säwedal proposed two species groups based on adult male morphology, but described 8 species from only the s;;fxf-group. Sublette & Sasa (1994) added another species from Central America. Reiff (2000), in a review of the entire genus, is reevaluating Säwedal's orellaimi-group. In the present paper a new species of the spixi-group is described, for the first time in Caladomyia including all life stages (larvae, pupae, male and female adults). Methods Larval and adult densities at the type locaUty were estimated from XII. 1992 through XII. 1993. Monthly, a pair of 150 ml samples of the aquatic macrophyte, Mayaca fluviatilis Aublet, 1775 were taken, chosen as similar in plant structure as possible. From the first sample of each pair, chironomid immatures were quantitatively removed under a stereoscope with transillumination. The second was maintained in a Container with pond water and enclosed in nylon mesh; all emerged adults were collected daily for 30 days. Eventually, each macrophyte sample was dried for 24 hs at 60 °C, and weighed according to Cyr & Downing (1988). In parallel, to obtain immature /adult associations, some larvae were isolated in small vials covered with nylon screen. AU material described below has been mounted on slides. Measurements are given as means followed by ranges in parentheses. The morphological terminology follows Ssether (1980) and Säwedal (1981). 167
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