Two new nematode species, Orientatractis campechensis n. sp. and Orientatractis chiapasensis n. sp. (Atractidae, Cosmocercoidea), are described from the intestine of cichlid fishes collected in localities of southeastern Mexico and Nicaragua. These atractid nematodes are characterized by the presence of a cephalic end armed with 4 marked, Y-shaped, well-sclerotized pieces, consisting of 2 “horns” extending outward and downward and immediately below a single-horned structure. Both new species differ from the other 2 species of Orientatractis (Orientatractis leiperi and Orientatractis levanhoai) mainly in the body measurements, presence of a vulvar appendix, lengths of spicules and of the gubernaculum, distribution of caudal papillae, and the number of anterior sclerotized structures. Morphological and biometrical variations were evident among specimens from different hosts and localities, with the larger organisms being collected from Vieja bifasciata and Cichlasoma pearsei. Orientatractis campechensis and O. chiapasensis represent the first 2 species of this genus parasitizing freshwater fishes; the other species have been found in amphibians and reptiles.
Skip Nav Destination
Article navigation
December 2004
SYSTEMATICS-PHYLOGENETICS|
December 01 2004
TWO NEW NEMATODE SPECIES, ORIENTATRACTIS CAMPECHENSIS N. SP. AND ORIENTATRACTIS CHIAPASENSIS N. SP. (NEMATODA: ATRACTIDAE) FROM CICHLID FISHES IN SOUTHERN MEXICO AND NICARAGUA
David González-Solís;
David González-Solís
Parasitología del Necton, El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal, Avenida Centenario Km. 5.5, C.P. 77900, A.P. 424, Chetumal, Quintana Roo, Mexico. dgs@ecosur-qroo.mx
Search for other works by this author on:
František Moravec
František Moravec
Parasitología del Necton, El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal, Avenida Centenario Km. 5.5, C.P. 77900, A.P. 424, Chetumal, Quintana Roo, Mexico. dgs@ecosur-qroo.mx
* Institute of Parasitology, Academy of Sciences of the Czech Republic, Branišovská 31, 370 05 České Budějovice, Czech Republic
Search for other works by this author on:
J Parasitol (2004) 90 (6): 1443–1449.
Citation
David González-Solís, František Moravec; TWO NEW NEMATODE SPECIES, ORIENTATRACTIS CAMPECHENSIS N. SP. AND ORIENTATRACTIS CHIAPASENSIS N. SP. (NEMATODA: ATRACTIDAE) FROM CICHLID FISHES IN SOUTHERN MEXICO AND NICARAGUA. J Parasitol 1 December 2004; 90 (6): 1443–1449. doi: https://doi.org/10.1645/GE-3366
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
Sign in via your Institution
Sign in via your InstitutionCiting articles via
EVALUATION OF PELIBUEY LAMBS BORN TO MOTHERS PHENOTYPICALLY SEGREGATED ACCORDING TO RESISTANCE TO GASTROINTESTINAL NEMATODES IN THE HUMID TROPICS OF MEXICO
Claudia Virginia Zaragoza-Vera, Roberto Gonzalez-Garduño, Maritza Zaragoza-Vera, Guadalupe Arjona-Jimenez, Antonio Ortega-Pacheco, Oswaldo Margarito Torres-Chable
ACCEPTANCE OF THE 2022 CLARK P. READ MENTOR AWARD: MENTORING BY DESIGN
Richard E. Clopton