Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 95(3): 301-304, May/Jun. 2000 301 Oswaldotrema nacinovici gen. nov. sp. nov. (: Philophthalmidae) from Numenius phaeopus (Aves: Scolopacidae) in Brazil Luís C Muniz-Pereira+, Roberto Magalhães Pinto*

Laboratório de Helmintos Parasitos de Vertebrados, Departamento de Helmintologia, Instituto Oswaldo Cruz, Av. Brasil 4365, 21045-900 Rio de Janeiro, RJ, Brasil A new genus, Oswaldotrema gen. nov. is proposed. Oswaldotrema nacinovici sp. nov. is descibed from Numenius phaeopus Latham, 1790. Differentiation from the other related genera, namely , Pygorchis, Proctobium, Parorchis, Echinostephila, Cloacitrema, Pittacium, Ophthalmotrema, Skrjabinovermis and Paratrema, was based on morphological characters, mainly on those referring to the body surface, body shape, head, esophagus, pharynx, acetabulum, vitellaria, vi- telline reservoir and seminal vesicle.

Key words: Digenea - Philophthalmidae - new taxa - Scolopacidae - birds - Brazil

Digeneans parasites of the whimbrel, Numenius MATERIALS AND METHODS phaeopus Latham, 1790, were subject of several The two specimens (one male and one female) studies, many of them summarized by Dronen and of Numenius phaeopus Latham, 1790, and the hel- Badley (1979). The present paper is the first to re- minth (from the female) were collected and pro- fer a helminth parasitizing N. phaeopus in Brazil, cessed for study, respectively, as reported earlier despite the efforts of great Brazilian (Muniz-Pereira & Amato 1995, 1998). Capture of helminthologists that in this century established the the hosts occurred between October 1989 and Oc- Helminthological Collection of the Instituto tober 1990, in the mouth of Piraque river and ad- Oswaldo Cruz (CHIOC), the biggest in South joining mudflat areas (Pedra de Guaratiba), Rio de America, based on large field works, reinforcing Janeiro, State of Rio de Janeiro, Brazil. Birds were the importance of collecting vertebrate hosts, in deposited as type host specimens, sensu Brooks order to increase the amount of data related to (1993), in the Ornithological Collection of the biodiversity in our country. Museu Nacional do Rio de Janeiro (UFRJ). The The subfamily Philophthalminae Looss, 1899, ecological term (prevalence) is used according to allocated by Looss (1899) in the family Fasciolidae Bush et al. (1997). Measurements are in microme- Railliet, 1895, was elevated by Travassos (1918) ters, unless otherwise stated. Photomicrographs to the rank of family as Philophthalmidae, to ac- were obtained in a Zeiss mod. Axiophot system commodate the genera Philophthalmus Looss, and the figure was achieved with the aid of a draw- 1899, Pygorchis Looss, 1899 and Proctobium ing tube connected to an Olympus CBA brightfield Travassos, 1918. Seven genera are presently in- microscope. Type specimen was deposited in the cluded to this family, Parorchis Nicoll, 1907; CHIOC, Rio de Janeiro, RJ, Brazil. Studied speci- Echinostephilla Lebour, 1909; Cloacitrema mens were obtained from CHIOC, Harold W Yamaguti, 1935; Pittacium Szidat, 1939 for the Manter Laboratory of Parasitology (HWML), species Distomum pittacium Braun, 1901; Museum für Naturkunde Humboldt Universität Ophthalmotrema Sobolev, 1943; Skrjabinovermis Berlin, Naturhistorisches Museum Wien and Belopolskaya, 1953 and Paratrema Dronen & United States National Parasite Collection Badley, 1979. (USNPC). RESULTS Oswaldotrema gen. nov. (Figs 1-5) Diagnosis: body, elliptical. Oral sucker terminal, +Corresponding author. Fax: +55-21-260.4866. E-mail: [email protected] width less than half of that of acetabulum; head * Research Fellow CNPq (proc. no. 300.374/80-1). collar absent (Fig. 4); prepharynx short. Esopha- Received 26 August 1999 gus long, without crenulations, bifurcating in front Accepted 13 January 2000 of the genital pore; ceca extending to near poste- 302 Oswaldotrema nacionovici gen. nov. sp. nov. • LC Muniz-Pereira, RM Pinto rior end of