Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 95(2): 161-165, Mar./Apr. 2000 161 Redescription of Tejidotaenia appendiculata (Baylis, 1947) (: ), a Parasite of Tupinambis teguixin (Sauria: Teiidae) from South America Amilcar Arandas Rego/+, Alain de Chambrier*

Departamento de Helmintologia, Instituto Oswaldo Cruz, Av. Brasil 4365, 21045-900 Rio de Janeiro, RJ, Brasil *Natural History Museum, P. O. Box 6434, 1211, Geneva 6, Switzerland The Tejidotaenia appendiculata (Baylis, 1947), a parasite found in teju, Tupinambis teguixin is redescribed and a new diagnosis is provided. The species is characterized by the anterior position of the ovary and the peculiar shape of suckers. It is the first record of this species in Brazil.

Key words: Tejidotaenia - cestode - Proteocephalidea - Lacertilia - Neotropical region - Brazil

Proteocephalidean cestodes have been recorded morphology were unresolved. In this paper a new from lizards in Australia, Africa and India, most generic diagnosis is provided. of them belonging to Acanthotaeniinae (Rego MATERIALS AND METHODS 1994). In America, only one acanthotaeniine spe- cies, Acanthotaenia overstreeti, was described by The specimens were collected and fixed by the Brooks and Schmidt (1978) from a lizard in Puerto Solution of Railliet and Henry (alcohol, acetic acid Rico. and formaldehyde - Travassos 1951); some speci- In South America the only proteocephalidean mens were compressed. Samples were stained with species reported from lizards are members belong- Delafield haematoxylin or hydrochloric carmine ing to the genera Proteocephalus Weinland, 1858 solution, dehydrated in an ethanol series, cleared and Ophiotaenia La Rue, 1911. Tejidotaenia in beechwood creosote or Eugenol, and mounted appendiculata (Baylis, 1947) is a species described in Canada balsam. Pieces of strobila were embed- from the lizard, Tupinambis nigropunctatus [= T. ded in parafin wax, sectioned at 5-8 µm, and stained teguixin, according to Avila-Pires (1995)] from with Delafield haematoxylin and eosin. Specimens Surinam (Dutch Guiana). This species has an un- for scanning electron microscopy (SEM) were de- usual position of the ovary and a peculiar type of hydrated in graded ethanol series, then dehydrated suckers, with a constriction resembling biloculate in graded amyl-acetate series, critical point dried suckers. in CO2 (lower index), sputtered with gold and ex- The senior author, on revising the collection of amined in a Zeiss DSM 940S. Drawings were made proteocephalids from Helminthological Collection with a camera lucida. Eggs were drawn after tranfer of the Instituto Oswaldo Cruz, Fiocruz, found some to distilled water. Scanning electron micrographs specimens collected from Tupinambis teguixin. The were made at the Museum of Natural History, specimens were identified as Baylis’ species due Geneva. All measurements are in mm. to the unequivocal characters of the suckers. This RESULTS is the second record of T. appendiculata and the first reference in Brazilian varanids. Tejidotaenia appendiculata (Baylis, 1947) The species is redescribed here because Baylis Freze, 1965 (1947) did not give figures of the proglottides, or Syn.: Proteocephalus appendiculatus Baylis, reproductive organs, and some details of sucker 1947 Ophiotaenia appendiculata (Baylis, 1947) Yamaguti, 1959 Host : Tupinambis teguixin (Linnaeus, 1758) [(Syn.: Tupinambis nigropunctatus Spix, 1825 (cf. Avila-Pires 1995)] +Corresponding author and Research fellow of CNPq (Cat. I-A). Fax: +55-21-872.2917. Material studied: Helminthological Collection of E-mails: [email protected] and Instituto Oswaldo Cruz, vials, No. 30.956 (imma- [email protected] ture worms) from Serra do Navio, Amapa and Received 19 April 1999 17,548 (mature and gravid) from Linhares, Espírito Accepted 27 December 1999 Santo, Brazil. Material mounted in Canada balsam 162 Redescription of Tejidot