Blackfin pupfish (''Cyprinodon beltrani'') is a species of fish in the family Cyprinodontidae. This pupfish is endemic to

Lake Chichancanab Lake Chichancanab is a lake in Mexico located in the northwest of the state of Quintana Roo, in the municipality of José María Morelos. It is also known as Laguna Chichancanab, Laguna Chicnancanab and Laguna de Chichancanab. It has an approxim ...

in Quintana Roo, Mexico. In almost all places, different '' Cyprinodon'' species do not overlap in their range, but there are two notable exceptions and one of these is Lake Chichancanab, which is inhabited by ''C. beltrani'', '' C. esconditus'', '' C. labiosus'', '' C. maya'', '' C. simus'', '' C. suavium'' and '' C. verecundus'' (the other place where several ''Cyprinodon'' species live together are lakes in San Salvador Island, the Bahamas). Among the endemic ''Cyprinodon'' species in Lake Chichancanab, only ''C. beltrani'' and ''C. labiosus'' still occur in some numbers in their habitat, while the remaining are virtually—if not fully—

extinct in the wild A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as known only by living members kept in captivity or as a naturalized population outside its historic range due ...

(at least some of these still survive in captivity). This species feeds on detritus. Compared to the other species of pupfish mentioned previously, the ''C. beltrani'' prefer a different feeding substrate (which is sand). In regards to mating, the female Blackfin pupfish seems to not mate with other species of pupfish and not just the ''C. beltrani''. The male blackfin pupfish have similar markings and courting behaviors to other pupfish in their habitat. The person honored in the

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

of this pupfish is the

Mexican Mexican may refer to: Mexico and its culture *Being related to, from, or connected to the country of Mexico, in North America ** People *** Mexicans, inhabitants of the country Mexico and their descendants *** Mexica, ancient indigenous people ...

biologist A biologist is a scientist who conducts research in biology. Biologists are interested in studying life on Earth, whether it is an individual cell, a multicellular organism, or a community of interacting populations. They usually specialize in ...

Enrique Beltrán Castillo (1903-1994) to mark his quarter century of being a biologist.

References

Cyprinodon Pupfish, Blackfin Pupfish, Blackfin Endangered fish Endangered biota of Mexico Endangered fauna of North America Taxa named by Jose Álvarez del Villar Fish described in 1949 Taxonomy articles created by Polbot {{Cyprinodontiformes-stub