An illustrated key to adult males of neotropical Fannia Robineau-Desvoidy belonging to pusio sub-group (Diptera, Fanniidae)

Chave ilustrada para machos adultos de Fannia Robineau-Desvoidy neotropicais pertencentes ao subgrupo pusio (Diptera, Fanniidae)

An illustrated key to adult males of neotropical Fannia Robineau-Desvoidy belonging to pusio sub-group (Diptera, Fanniidae)

Chave ilustrada para machos adultos de Fannia Robineau-Desvoidy neotropicais pertencentes ao subgrupo pusio (Diptera, Fanniidae)

Couri, M. S.

Departamento de Entomologia, Museu Nacional, Quinta da Boa Vista, CEP 20940-040, Rio de Janeiro, RJ, Brazil, Research fellow of Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq

^{Correspondence to}

ABSTRACT

The 11 neotropical species of Fannia belonging to the pusio sub-group (canicularis group), are keyed –F. dodgei Seago; F. femoralis (Stein); F. pamplonae Couri & Araújo; F. parafemoralis Araújo & Couri;F. paraisensis Araújo & Couri; F. punctivervis Malloch; F. pusio (Wiedemann); F. sabroskyi Seago;F. snyderi Seago; F. trimaculata (Stein); F. trimaculatoides Couri & Pamplona. The key is addressed only to the males and the illustrations help in the visualization of the characters.

Keywords: Fanniidae, Fannia, key to males, pusio sub-group, identification.

RESUMO

As onze espécies neotropicais de Fannia pertencentes ao subgrupo pusio (grupo canicularis), são chaveadas – F. dodgei Seago; F. femoralis (Stein); F. pamplonae Couri & Araújo; F. parafemoralis Araújo & Couri; F. paraisensis Araújo & Couri; F. punctivervis Malloch; F. pusio (Wiedemann); F. sabroskyi Seago; F. snyderi Seago; F. trimaculata (Stein); F. trimaculatoides Couri & Pamplona. A chave é direcionada apenas para os machos e as ilustrações auxiliam na visualização dos caracteres.

Palavras-chave: Fanniidae, Fannia, chave para machos, subgrupo pusio, identificação.

INTRODUCTION

Fannia Robineau-Desvoidy, 1830 (Diptera, Fanniidae) is known in the tropics for 65 valid species.

Mainly based on male terminalia characters, Hennig (1955) and Chillcott (1960) proposed the organization of the Fannia species into groups, some of them divided into sub-groups. Albuquerque et al. (1981) recognized some of these groups to the neotropical species, and also gave a characterization of them.

The pusio sub-group is very homogeneous and belongs to the canicularis group, which can be characterized by the bare parafacial; presence of posteroventral setae on hind coxa; cercal plate longer than wider; surstylus extending from the inner margin of the ninth tergum and absence of a bacilliform processes, while the sub-group pusio can be characterized by the absence of the upper orbital bristle and by the trimaculate abdomen in males (Hennig, 1955; Chillcott, 1960; Albuquerque et al., 1981). Both canicularis group and pusio sub-group can be easily identified in the keys to groups and sub-groups presented by Chillcott (op. cit.) and Albuquerque et al. (op. cit.).

The identification of Fannia males becomes easier as they exhibit a variety of secondary sexual characters, while the females remain relatively primitive (Chillcott, 1960). Among others male diagnostic characters, the bristling especially of the mid and hind femora is particularly important.

Because of the difficulty of identifying females, the present key is addressed only to the males. The use of the key is facilitated by the illustrations of legs, especially of the hind femur.

Carvalho et al. (1993) lists 9 Fannia species to the pusio sub-group. Araújo & Couri (1996) added two new species to them.

The present key was based on Seago (1954) and Albuquerque et al. (1981) and includes the 11 neotropical species described to the sub-group: F. dodgei Seago, 1954; F. femoralis (Stein, 1898); F. pamplonae Couri & Araújo, 1989; F. parafemoralis Araújo & Couri, 1996; F. paraisensis Araújo & Couri, 1996; F. punctivervis Malloch, 1934; F. pusio (Wiedemann, 1830); F. sabroskyi Seago, 1954; F. snyderi Seago, 1954; F. trimaculata (Stein, 1898); F. trimaculatoides Couri & Pamplona, 1990.

ILLUSTRATED KEY TO THE NEOTROPICAL MALE Fannia SPECIES BELONGING TO Pusio SUB-GROUP

1. Hind femur with a distinct pre-apical ventral swelling (Fig. 1) ................... 2
Hind femur with no pre-apical ventral swelling (Fig. 2 ) ................................8

Acknowledgments — The author is gratified to CNPq for her research grant (process number 300386/80-0) for the financial support to the project and to Luiz Antonio Alves da Costa (Museu Nacional) for the final art of the illustrations.

Received June 27, 2003 – Accepted October 4, 2004 – Distributed November 30, 2005

• ALBUQUERQUE, D. DE O., PAMPLONA, D. & CARVALHO, C. J. B., 1981, Contribuição ao conhecimento dos Fannia R.-D., 1830 da região neotropical (Diptera, Fanniidae). Archos Mus. nac. Rio de J., Rio de Janeiro, 56: 9-34, 60 figs.
• ARAÚJO, P. F. DE & COURI, M. S., 1996, Duas novas espécies de Fannia Robineau-Desvoidy (Diptera, Fanniidae) do Rio de Janeiro, Brasil. Revta bras. Zool., 13 (2): 335-341.
• CARVALHO, C. J. B.; PONT, A. C.; COURI, M. S. & PAMPLONA, D., 1993, Parte I. Fanniidae. I-29 In: A Catalogue of the Fanniidae and Muscidae (Diptera) of the Neotropical region. - Sociedade Brasileira de Entomologia. São Paulo.
• CHILLCOTT, J. G., 1960, A Revision of the Nearctic Species of Fanniinae (Diptera: Muscidae). Can. Ent., 92 (14): 295 pp., 289 figs., 1 table, 61 maps.
• HENNIG, W., 1955, Muscidae [Part, Lieferung 182]. In: E. Lindner (ed.). Die Fliegen der palaearktischen Region 63 b: 1-48, text figs. 1-16, plates 1-3. Sttutgart.
• SEAGO, J. M., 1954, The pusio Group of the Genus Fannia Robineau-Desvoidy, with Descriptions of New Species (Diptera, Muscidae). Amer. Mus. Nov., 1699:13 pp., 20 figs.

Publication Dates

• Publication in this collection
  06 Mar 2006
• Date of issue
  Nov 2005

History

• Received
  27 June 2003
• Accepted
  04 Oct 2004