Abstracts

ARTIGOS

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

Uma nova espécie de Djamabatista Fittkau (Chironomidae, Tanypodinae) do Estado do Mato Grosso, Brasil

Linn Katrine Hagenlund; Trond Andersen; Humberto Fonseca Mendes^** Corresponding author: Humberto Fonseca Mendes, e-mail: humberto.mendes@bm.uib.no

Department of Natural History, Bergen Museum, University of Bergen, PO Box 7800, N-5020, Bergen, Norway, e-mail: linn.hagenlund@student.uib.no, trond.andersen@zmb.uib.no

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 by having a projection with apical brush on the inner margin of the gonocoxite; it can be separated from D. ivanyae on the banded abdomen.

Keywords: Chironomidae, Tanypodinae, Procladiini, Djalmabatista, new species, Neotropical region.

RESUMO

Djalmabatista scopulata sp. n. é descrita e ilustrada com base no macho adulto de material coletado em armadilha luminosa no Estado do Mato Grosso, Brasil. Esta nova espécie se aproxima de Djalmabatista ivanyae Fittkau, 1968 pela projeção de pelos na margem interna do gonocoxito, da qual pode ser separada com base no padrão de coloração do abdomen.

Palavras-chave: Chironomidae, Tanypodinae, Procladiini, Djalmabatista, espécie nova, região Neotropical.

Introduction

The genus Djalmabatista was described by Fittkau (1968) for five species from the Amazon area in Brazil. Later, three additional species have been described from the Neotropical region (Paggi 1985, Carraro et al. 1992, Oliveira & Carraro 1997). Prothentes pulcher Johannson, 1908 from North and South America; Procladius (Calotanypus) bifida Chaudhuri et Debnath, 1983 from India and Procladius (Psilotanypus) reidi Freeman, 1955 from the Palaearctic, Afrotropical and Oriental regions have been transferred to the genus (see Ashe & O'Connor 2009). The genus has also been recorded from Australia (Cranston & Martin 1989). Recently, D. maillardi Doitteau et Nel, 2007 was described from early Eocene amber in France.

The genus belongs to the tribe Procladiini and is related to the genus Procladius Skuse. However, Djalmabatista is generally easily recognized on the striking color patterns on the thorax, abdomen and legs and the iridescent eyes. The larvae are known to inhabit lakes, ponds and slow flowing rivers. In the Neotropical Region larvae appear to live predominantly in rivers.

Below we describe a new species of Djalmabatista from Mato Grosso in Brazil resembling D. ivanyae Fittkau, 1968 by having a projection with apical brush on the inner margin of the gonocoxite. It can readily be separated from D. ivanyae on the color pattern of the abdomen; while D. ivanyae has a pale abdomen, the abdomen of the new species has a distinct dark brown pattern.

Material and Methods

The specimens were mounted on slides in Canada balsam following the procedure outlined by Sæther (1969). The general terminology follows Sæther (1980). The measurements are given as ranges. The color is described based on cleared, slide-mounted specimens.

The holotype is deposited in the Museu de Zoologia da Universidade de São Paulo (MZUSP), São Paulo, Brazil; the paratype in the Department of Natural History, Bergen Museum (ZMBN), University of Bergen, Bergen, Norway.

Djalmabatista Fittkau

Djalmabatista Fittkau, 1968: 328.

Djalmabatista Fittkau; Roback & Coffman (1977: 49), Roback & Tennessen (1978: 11), Roback (1989: 73).

Djalmabastica: incorrect subsequent spelling. (See Ashe & O'Connor 2009: 154 for details).

Calotanypus Roback, 1971: 152, as subgenus of Procladius Skuse, 1889; type species: Protenthes pulcher Johannsen, 1908, by original designation. Synonymized with Djalmabatista Fittkau, 1968, by Roback & Tennessen (1978: 17).

1. Type species

Djalmabatista director Fittkau, 1968: 332, by original designation.

2. Other included species

Djalmabatista amancii Fittkau, 1968: 344; Amazonas, Brazil.

Djalmabatista antonii Fittkau, 1968: 335; Amazonas, Brazil.

Djalmabatista bifida (Chaudhuri et Debnath, 1983: 115), as Procladius (Calotanypus). India.

Djalmabatista dellomei Fittkau, 1968: 342; Pará, Brazil.

Djalmabatista ivanyae Fittkau, 1968: 340; Amazonas, Brazil.

Djalmabatista lacustris Paggi, 1985: 75; Argentina.

Djalmabatista maillardi Doitteau et Nel, 2007: 12; France: early Eocene amber.

Djalmabatista orlandoi Oliveira et Carraro, 1997: 3; São Paulo, Brazil.

Djalmabatista pulchra (Johannsen, 1908: 273), as Prothentes. Brazil, ?Costa Rica, ?Guatemala, ?Mexico, ?Nicaragua; Canada, U.S.A.

Djalmabatista reidi (Freeman, 1955: 61), as Procladius (Psilotanypus). Saudi Arabia, United Arab Emirates; Cameroon, Chad, Ghana, Guinea, Sudan, Togo; India.

Djalmabatista scopulata sp. n.; Mato Grosso, Brazil.

Djalmabatista travassoi Carraro, Oliveira et Rego, 1992: 57; Rio de Janeiro, Brazil.

Generic diagnoses for males, females and pupae are given by Fittkau (1968), Fittkau & Murray (1986), Murray & Fittkau (1989) and Sæther & Andersen (2000); for larvae by Roback & Tennessen (1978) and Fittkau & Roback (1983).

Djalmabatista scopulata sp. n. (Figures 1-9)

Type material: Holotype male, BRAZIL: Mato Grosso State: Nova Xavantina, Fazenda Sr. Queté, Córrego Cachoeira, 14°32.817'S, 52°31.395'W, 16.X.2007, light trap, Luiz C. Pinho et al. leg (MZUSP). Paratype: 1 male, same data as holotype (ZMBN).

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, R₁ with 13, R₄₊₅ with 17-18, M₁₊₂ with 3-9, M₃₊₄ with 11-14, Cu with 1-2, Cu₁ with 5-6, remaining veins bare. Squama with 15-16 setae. Cell r₄₊₅ with 51-62 setae, m₁₊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. Comb with 10-11 setae, shortest seta 25-27 µm long, longest 46-50 µm. Lengths and proportions of legs as in Table 1.

Abdomen: As in Figure 3.

Hypopygium (Figures 4-5): Tergite IX with 6-7 setae in single posterior row. Phallapodeme 102-105 µm long. Gonocoxite 145-148 µm long; with 19-21 µm long, 15-18 µm wide, subrectangular projection on inner margin, with apical brush of flattened setae. Gonostylus (Figures 6-9) 82-93 µm long; with rounded outer corner; with median inner projection, 32-36 µm long, 14-15 µm wide at base, 21-22 µm wide at apex; apically split in dorsal, membranous bluntly triangular lobe, with single setae ventrally (Figure 8) and club-shaped, ventral lobe, with 5 strong setae on dorsal surface (Figure 9), megaseta lanceolate, 25-29 µm long, 7-9 µm wide at its widest part, crista dorsalis along inner margin and apex of the distalmost part of gonostyle, 8-9 µm long apically, ventral subapical seta 14-16 µm long. HR 1.56-1.81. HV 3.51-3.77.

Female, pupa, larva, and egg mass: Unknown.

Distribution and biology: The species was taken in a light trap situated close to a small stream in Nova Xavantina in Central Brazil. The stream where the specimens were collected is a tributary to the Rio das Mortes, that forms the Araguaia-Tocantins basin.

Acknowledgements

We are indebted to Dr. Luiz C. Pinho for sending us the material. Gladys Ramirez made the slide preparations.

Received 30/06/2010

Revised 31/08/2010

Accepted 28/09/2010

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