Rhamdia zongolicensis

Wilkens 1993

Rhamdia zongolicensis
Redrawn by Rhian Kandall from Wilkens (1993)






Holotype: ZMH 8249 92mm SL. Paratypes: ZMH 8250, 3 specimens 65-85mm SL.


Known only from the type locality: Cueva del Ostoc, Sierra de Zongolica, Veracruz, México (18oN, 97oW). This cave is also known as Cueva de El Túnel and under this name was described by Robertson (1983) and Mosier (1984) both of whom mentioned the fishes, the former also providing a photograph.


There is little published information. Wilkens (1993a) reports that there was no other animal life in the pools in the cave and that the type specimens were undernourished. This may suggest that the food supply is episodic, perhaps related to flood events. Robertson (1983) provides a survey.


Silfvergrip (1986) does not accept that this species is diagnosable from Rhamdia laticauda and places it within that species.

Conservation Status

TLO [VU D2:3.1:2019]

Arroyave, J. and Schmitter-Soto, J. 2019. Rhamdia zongolicensis. The IUCN Red List of Threatened Species 2019: e.T19456A2349993. Downloaded on 10 December 2020.

Threatened (Contreras-Balderas et al. 2003)


1996 – Vulnerable (VU)

Museum Holdings

As above only.

Key References

Robertson, S. Journal Article 1983 Cueva del Tunel, Veracruz
Mosier, D. Journal Article 1984 Cave dwelling populations of Rhamdia (Pimelodidae)
Williams, J.E., Johnson, J.E., Hendrickson, D.A., Conteras-Balderas, S., Williams, J.D., Navarro-Mondoza, M., McAllister, D.E. and Deacon, J.E. Journal Article 1989 Fishes of North America endangered, threatened or of special concern 1989
Wilkens, H. Journal Article 1991 Comparative study and phylogenetic age of epigean and cave forms of the genus Rhamdia (Pimelodidae, Teleostei)
Junge, P. Journal Article 1992 Egg size and larval development of epigean and cave forms of Rhamdia guatemalensis (Pimelodidae, Pisces)
Langecker, T.G. and Wilkens, H. Journal Article 1992 Comparative ultrastructural studies on the pineal organ of the Mexican catfish Rhamdia laticauda Heckel, 1858 and one of its cave-dwelling derivatives (Pimelodidae, Teleostei)
Wilkens, H. Journal Article 1993 A new species of Rhamdia (Pisces, Pimelodidae) from a cave in the Sierra de Zongolica (Veracruz, Mexico)
Wilkens, H. Journal Article 1993 Adaptation and phylogenetic age of Mexican epigean and cave Rhamdia (Pimelodidae)
Weber, A. Journal Article 1995 The lateral line system of epigean and cave dwelling catfishes of the genus Rhamdia (Pimelodidae, Teleostei) in Mexico
Silfvergrip, A.M.C. Book 1996 A systematic revision of the neotropical catfish genus Rhamdia (Teleostei, Pimelodidae)
Weber, A. Journal Article 1996 Cave dwelling catfish populations of the genus Rhamdia (Pimelodidae, Siluroidei, Teleostei) in Mexico
Weber, A. Journal Article 1998 Mexican cave catfish of the genus Rhamdia (Pimelodidae): notes on adaptation and distribution
Wilkens, H. Journal Article 2001 Convergent adaptations to cave life in the Rhamdia laticauda catfish group (Pimelodidae, Teleostei)
Perdices, A., Bermingham, E., Montilla, A. and Doadrio, I. Journal Article 2002 Evolutionary history of the genus Rhamdia (Teleostei: Pimelodidae) in Central America
Contreras-Balderas, S, Almada-Villela, P, Lozano-Vilano, M de L and Garcia-Ramirez, ME Journal Article 2003 Freshwater fish at risk or extinct in Mexico
Weber, A Thesis 2003 Taxonomie und Artstatus hohlenbewohnender und oberirdischer Welse der Gattung Rhamdia (Pimelodidae, Teleostei) in Mexiko
Contreras-Balderas, S and others, 13 Journal Article 2008 Freshwater fishes and water status in México: A country-wide appraisal
Hulsey, C.D. and Lopez-Fernandez, H. Book Section 2011 Nuclear Central America
Contreras-Macbeath, T., Rodriguez, M.B., Sorani, V., Goldspink, C., and McGregor Reid, G. Journal Article 2014 Richness and endemism of the freshwater fishes of Mexico
Palacios-Vargas, J.G., Juberthie, C. and Reddell, J. Book 2014-2015 Encyclopaedia Biospeologica Mexico
Scaglione, M.C., Cerutti, R.D., Arfuso, F. and Piccione, G. Journal Article 2018 Light and dark rations and the photic entrainment of circadian locomotor activity patterns in the South American Silver Catfish (Rhamdia quelen, Quoy & Gaimard, 1824)
Koerber, S. and Reis, R.E. Journal Article 2019 The current situation of Rhamdia Bleeker, 1858 (Siluriformes: Heptapteridae) – Gather available information, define a zero point, and start all over again
Warren, M.L. and Burr, B.M. Book 2020 Freshwater fished of North America. Volume 2 Characidae to Poeciliidae
Thomas, M.R. and Sabaj, M.H. Book Section 2020 Heptapteridae: Seven-finned catfishes
Koerber, S. and Reis, R.E. Journal Article 2020 Evidence for the true type-locality of Rhamdia quelen (Siluriformes: Heptapteridae), and the geographical origin and invalid neotype designation of four of its synonyms