Generic revision of the North and Central American Leptohyphidae (Ephemeroptera : Pannota)

The North and Central American Leptohyphidae (Leptohyphinae) consists of Al lenhyphes Hofmann and Sartori, Haplohyphes Alien, Leptohyphes Eaten, and Va cupernius, n. gen. Leptohyphidae (Tricorythodinae, n. subfam.) of the same region consists of Asioplax, n. gen., Epiphrades, n. gen., Homoleptohyphes Allen and Murvosh, n. stat., Tricoryhyphens Alien and Murvosh, n. stat., Tr icorythodes Ulmer, and Tricorythopsis Traver. Asioplax is from the Antilles , North, Central, and South America and includes A. corpulenta (Kilgore and Alien), n. comb., A. curiosa (Lugo-Ortiz and McCafferty), n. comb., A. dol ani (Allen), n. comb., A. edmundsi (Allen), n. comb., A. nicholsae (Wang, S ites and McCafferty), n. comb., A. sacchulobranchis (Kluge and Naranjo), n. comb., A. sierramaestrae (Kluge and Naranjo), n. comb., and A. texana (Tra ver), n. comb. Epiphrades is from Central and South America and includes E, bullus (Allen), n. comb., E. cristatus (Allen), n, comb., and E. undatus ( Lugo-Ortiz and McCafferty), n. comb. Vacupernius is from North and Central America and the Antilles and includes V. packeri (Allen), n. comb., V. para guttatus (Allen), n. comb., and V, rolstoni (Allen), n. comb. Of species or iginally placed in HomoLeptohyphes only the type H. dimorphus (Allen), n, c omb., is retained; H. mirus (Allen), n. comb. and H. quercus (Kilgore and A lien), n, comb., are added. Tricoryhyphes is also redefined and includes in North and Central America T. condylus (Allen), n. comb. and T. mulaiki, n. comb. Allenhyphes is revised to include an additional 10 species, includin g in North and Central America A. michaeli (Allen), n. comb., A. nanus (All en), n. comb., and A. vescus (Allen), n. comb. Additional regional recombin ations include Tricorythodes costaricanus (Ulmer), n. comb., T. robacki (Al len), n. comb., Tricorythopsis dicinctus (Allen and Brusca), n. comb., and T. melanobranchus (Allen and Brusca), n. comb. All higher taxa of the Lepto hyphidae in North and Central America are reviewed, keyed, and illustrated.