Cyprinodontiformes

fish order

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In fish: Annotated classification
Order Cyprinodontiformes (killifishes and live-bearers) Symmetrical caudal skeleton with single epural mirroring autogenous parhypural; 1st pleural rib on the 2nd, rather than the 3rd vertebra. 9 families, with about 109 genera and at least 1,000 species. Freshwater and coastal marine. Order Beloniformes
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