Folia Parasitologica, vol. 56 (2009), issue 4

Folia Parasitologica 56[4] 305-312 (2009) | DOI: 10.14411/fp.2009.035

Redescription of Spinitectus tabascoensis (Nematoda: Cystidicolidae) from fishes of the Lacandon rain forest in Chiapas, southern Mexico, with remarks on Spinitectus macrospinosus and S. osorioi

Franti¹ek Moravec1, Guillermo Salgado-Maldonado2, Juan M. Caspeta-Mandujano3, David González-Solís4
1 Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, Brani¹ovská 31, 370 05 Èeské Budìjovice, Czech Republic
2 Instituto de Biología, Universidad Nacional Autónoma de México, A.P. 70-153, C.P. 04510, México, D.F., Mexico
3 Laboratorio de Parasitología de Animales Silvestres, Facultad de Ciencias Biológicas y Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de Morelos, Av. Universidad No. 1001, Col. Chamilpa, C.P. 62210, Cuernavaca, Morelos, Mexico
4 Parasitología del Necton, El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal, Avenida Centenario Km. 5.5, A.P. 424, C.P. 77900, Chetumal, Quintana Roo, Mexico

Two little-known species of Spinitectus (Nematoda: Cystidicolidae) were, for the first time, recorded from fishes of the Lacantún River (Usumacinta River basin) in the Lacandon rain forest, Chiapas, southern Mexico: S. tabascoensis Moravec, García-Magaña et Salgado-Maldonado, 2002 in intestines of Ictalurus furcatus (Valenciennes) (Ictaluridae) (adults and juveniles), Cathorops aguadulce (Meek) and Potamarius nelsoni (Evermann et Goldsborough) (both Ariidae) (in both only juveniles), and S. osorioi Choudhury et Pérez-Ponce de León, 2001 in Atherinella alvarezi (Díaz-Pardo) (Atherinopsidae) (adults in intestine) and Eugerres mexicanus (Steindachner) (Gerreidae) (adults and juveniles in stomach). Eugerres mexicanus, C. aguadulce and P. nelsoni represent new host records. Detailed light and electron microscopical studies of S. tabascoensis revealed some taxonomically important, previously not observed features, such as cuticular spines arranged in four sectors, the cephalic structure, the number (2) of ventral precloacal ridges or the structure of the male caudal end. Therefore, Spinitectus tabascoensis is redescribed. Spinitectus macrospinosus Choudhury et Perryman, 2003, described from ictalurids in Canada and the USA, is considered its junior synonym. Spinitectus tabascoensis seems to be a specific parasite of Ictalurus spp., whereas C. aguadulce and P. nelsoni, as well as some other fishes, serve only as its paratenic hosts. The definitive hosts of S. osorioi are atherinopsid fish (A. alvarezi, Chirostoma spp.), whereas the gerreid E. mexicanus probably serves only as its postcyclic host.

Keywords: parasitic nematode, Spinitectus, fish, Atherinella, Cathorops, Eugerres, Ictalurus, Potamarius, Lacandon rain forest, Lacantún River, Chiapas, Mexico

Received: August 7, 2009; Accepted: October 13, 2009; Published: December 1, 2009


  1. Caspeta-Mandujano J.M. 2005: Nematode Parasites of Freshwater Fish in Mexico: Key to Species, Descriptions and Distribution. Facultad de Ciencias Biologicas, Universidad Autonoma del Estado de Morelos, Cuernavaca, Mexico, 175 pp
  2. Caspeta-Mandujano J.M., Cabanas -Carranza G., SalgadoM aldonado G. 2007: Spinitectus mariaisabelae n. sp. (Nematoda: Cystidicolidae) from the intestine of the freshwater fish Profundulus punctatus (Cyprinodontiformes) in Mexico. Helminthologia 44: 103-106 Go to original source...
  3. Choudhury A., Perez-Ponce de Leon G. 2001: Spinitectus osorioi n. sp. (Nematoda: Cystidicolidae) from Chirostoma spp. (Osteichthyes: Atherinidae) in Lake Patzcuaro, Michoacan, Mexico. J. Parasitol. 87: 648-655
  4. Choudhury A., Perryman B.J. 2003: Spinitectus macrospinosus n. sp. (Nematoda: Cystidicolidae) from the channel catfish Ictalurus punctatus in southern Manitoba and its distribution in other Ictalurus spp. J. Parasitol. 89: 782-791 Go to original source... Go to PubMed...
  5. Froese R., Pauly D. (E ds .) 2009: FishBase. World Wide Web electronic publication., 8/2009
  6. Hoffnagle T.L., Cole R.A., Shoop W.L. 1990: Gastrointestinal parasites of the blue catfish (Ictalurus furcatus) in Kentucky Lake, Tennessee. J. Helminthol. Soc. Wash. 57: 40-43
  7. Jilek R., Crites J.L. 1982: Comparative morphology of the North American species of Spinitectus (Nematoda: Spirurida) analyzed by scanning electron microscopy. Trans. Am. Microsc. Soc. 101: 126-134 Go to original source... Go to PubMed...
  8. Ko R.C. 1986: A Preliminary Review of the Genus Ascarophis van Beneden, 1871 (Nematoda: Cystidicolidae) of the Gastrointestinal Tract of Fishes. Occasional Publications, Department of Zoology, University of Hong Kong, 54 pp
  9. Lira-Guerrero G., Garcia-Prieto L., Perez-Ponce de Leon G. 2008: Helminth parasites of atherinopsid freshwater fishes (Osteichthyes: Atheriniformes) from central Mexico. Rev. Mex. Biodiv. 70: 325-331
  10. Moravec F. 1979: Redescription of the nematode Spinitectus inermis parasitic in eels, Anguilla anguilla, of Europe. Acta Soc. Zool. Bohemoslov. 43: 35-42
  11. Moravec F. 1996: Some new data on the morphology of Spinitectus inermis (Nematoda: Cystidicolidae), a rare parasite of eels, as revealed by SEM. Parasite 3: 169-174 Go to original source...
  12. Moravec F. 2007: Some aspects of the taxonomy and biology of adult spirurine nematodes parasitic in fishes: a review. Folia Parasitol. 54: 239-257 Go to original source... Go to PubMed...
  13. Moravec F., Garcia-Magana L., Salgado-Maldonado G. 2002: Spinitectus tabascoensis sp. nov. (Nematoda, Cystidicolidae) from Ictalurus furcatus (Pisces) in southeastern Mexico. Acta Parasitol. 47: 224-227
  14. Moravec F., Klimpel S. 2007: New data on the morphology of Spinitectus oviflagellis Fourment, 1884 (Nematoda: Cystidicolidae) from the pyloric caeca of Macrourus berglax (Macrouridae) in the eastern Greenland Sea. Syst. Parasitol. 67: 43-50 Go to original source... Go to PubMed...
  15. Moravec F., Salgado-Maldonado G., Caspeta-Mandujano J.M. 2010: Observations on Spinitectus osorioi (Nematoda: Cystidicolidae) in the Mexican endemic fish Atherinella alvarezi (Atherinidae) from the Atlantic river drainage system in Chiapas, southern Mexico. Mem. Inst. Oswaldo Cruz (In press.)
  16. Odening K. 1976: Conception and terminology of hosts in parasitology. Adv. Parasitol. 14: 1-93 Go to original source... Go to PubMed...