A new species of Djalmabatista Fittkau (Chironomidae, Tanypodinae) from Mato Grosso, Brazil

Abstract

A new species of Djalmabatista Fittkau (Chironomidae, Tanypodinae) from Mato Grosso, Brazil. Biota Neotrop. 10(3): http://www.biotaneotropica.org.br/v10n3/en/ abstract?article+bn04210032010.Abstract: Djalmabatista scopulata sp. n. is described and figured as male imago, based on material collected in a light trap in Mato Grosso, Brazil. The new species groups with Djalmabatista ivanyae Fittkau, 1968 Generic diagnoses for males, females and pupae are given by Fittkau (1968), Fittkau & Murray (1986), Murray & Fittkau (1989) and Saether & Andersen (2000); for larvae by Roback & Tennessen (1978) and Fittkau & Roback (1983).Djalmabatista scopulata sp. n. (Figures 1-9 Diagnostic characters: The species can be distinguished from all other Djalmabatista species except D. ivanyae by the presence of a projection with apical brush on the inner margin of the gonocoxite. The banded abdomen separates it from D. ivanyae, which has a pale abdomen.Etymology: From Latin scopa, broom and the suffix -atus, equipped with, referring to the brush on the inner margin of the gonocoxite.Male (n = 1-2). Total length 3.09-3.27 mm. Wing length 1.33-1.39 mm. Total length / wing length 2.23-2.46. Wing length / length of profemur 2.28-2.37.Coloration: Head and palps pale brown. Thorax pale with dark brown, confluent vittae, median anepisternum, preepisternum and postnotum. Legs with femur and tibia brown, all tarsi pale brown. Wing with blackish brown spot over RM and slightly paler spot over MCu. Abdomen yellowish with distinct dark brown pattern on tergites I-VII, hypopygium dark brown, gonostylus blackish brown (Figure 3).Head: AR 1.49-1.55. With 14 flagellomeres, ultimate flagellomere 161-162 µm long. Temporal setae 11-13, uniserial to irregularly biserial posteriorly. Clypeus with 8-13 setae. Tentorium 150-159 µm long, 25-27 µm wide. Stipes not measurable. Palpomere lengths / widths (in µm): 39-45 / 30-33, 54-61 / 18-32, 84-86 / 27, 114-116 / 23-25, 168 / 18. No sensillae on third palpomere. Eye-elongation long, narrow, with rows of 2-3 ocelli (Figure 1).Thorax: Antepronotum with 3-6 setae. Acrostichals 12, dorsocentrals 8-9, prealars 4-5, supraalar 0-1. Scutellum with 9 setae.Wing (Figure 2): VR 1.30-1.39. Costal extension 121 µm long. Brachiolum with 1 seta, costal extension with 8-14 non-marginal setae, R with 17-18 setae, R 1 with 13, R 4+5 with 17-18, M 1+2 with 3-9, M 3+4 with 11-14, Cu with 1-2, Cu 1 with 5-6, remaining veins bare. Squama with 15-16 setae. Cell r 4+5 with 51-62 setae, m 1+2 with 10-15 setae, remaining cells bare.Legs: Spur of fore tibia 34-40 µm long, with 3-5 inner denticles; spurs of mid tibia 41-45 and 25-29 µm long, with 5 and 3 inner denticles, respectively; spurs of hind tibia 48-49 and 25-27 µm long, with 4-5 and 3 inner denticles, respectively. Width at apex of fore tibia 36-45 µm, of mid tibia 42-43 µm, of hind tibia 44-45 µm.