Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

Two new species of cichlid fishes, <i>Cichlasoma sajica</i> and <i>C. diquis</i>, from southeastern Costa Rica

How to Cite

Bussing, W. A. (1974). Two new species of cichlid fishes, <i>Cichlasoma sajica</i> and <i>C. diquis</i>, from southeastern Costa Rica. Revista De Biología Tropical, 22(1), 29–49. Retrieved from


Two new endemic forms are added to the growing list of species indigenous to the tropical wet rainforest region of the Pacific versant of Costa Rica. The new species are described from extensive material collected from throughout their respective ranges. In addition to meristic and morphometric data, the colors of live specimens, sexual dimorphism, and ecological aspects are discussed.

Both new species appear to represent Pacific slope cognates of Trans-American geminate pairs: Cichhlasoma sajica and the Atlantic slope C. septemfasciatum, and C. diquis and the principally Atlantic slope C. alfari. It is postulated that these and other geminale pairs with similar distributions arose from common ancestors on the Tertiary Talamanan, and that during the Pliocene the members of each species pair were isolated from each other by the emerging intercontinental land bridge between the Americas.



BUSSING, W. A. 1967. New species and new records of Costa Rican freshwater fishes with a tentative list of species. Rev. Biol. Trop., 14: 205-249.

BUSSING, W. A., & T. ROBERTS 1971. Rediscovery of the glandulocaudine fish Pterobrycon and hypothetical significance of its spectacular humeral scales (Pisces: Characidae). Copeia, 1971: 179-181.

BUSSING, W. A. 1975. Geographic distribution of the San Juan ichthyofauna of Central Arnerica, with remarks on its origin and ecology. In T. R. Thorson, (ed.), Investigatins of the ichthyology of the Great Lakes of Nicaragua. Univ. Nebraska Press, in press.

GOSSE, J. P. 1966. Poissons d'eau douce du versant Pacifique du Costa Rica et Panama recoltés por sa Majesté le Roi Leopold de Belgique. Bull. Inst. R. Sci. Nat. Belg., 42: 1-24.

LOFTIN, H. G. 1965. The geographical distribution of freshwater fishes in Panama. Ph. D. dissertation, Florida State Univ., Tallahassee, Florida.

MARTIN, M. 1972. A biogeographic analysis of the freshwater fishes of Honduras. Ph. D. dissertation, Univ. of So. Calif., Los Angeles, Calif.

MEEK, S. E. 1914. An annotated list of fishes known to occur in the fresh waters of Costa Rica. Fieldiana, 2001. Ser., 10: 101-134.

REGAN, C. T. 1906 08. Pisces; p. 1-203. In : Biologia Centrali-Americana, 8.


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Copyright (c) 1974 Revista de Biología Tropical


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