Cyprinodon arcuatus (Santa Cruz pupfish) is a species of fish in the family Cyprinodontidae. It was endemic to the Santa Cruz River in Arizona. It has been declared extinct as of 2011.
| Cyprinodon arcuatus | |
|---|---|
Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cyprinodontiformes |
| Family: | Cyprinodontidae |
| Genus: | Cyprinodon |
| Species: | †C. arcuatus |
| Binomial name | |
| †Cyprinodon arcuatus Wendell L. Minckley & R. R. Miller, 2002 | |
The Santa Cruz pupfish exhibited sexual dimorphism in size, with males averaging 37mm (1.46in) in length and females averaging 32mm (1.26in) in length.[2] Coloration in breeding males was dark green to black with alternating stripes of light and dark. Female and non-breeding males were reported to have clear fins except for a black dorsal fin. C. arcuatus is differentiated from other Cyprinodon species by a highly convex dorsal body and concave post-dorsal body, as well a lack of orange or yellow in breeding males' fins.
| Taxon identifiers |
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