The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
Option 1 | Option 2 |
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Hind wings present with costal projections (sf 13.211) hooked or straight | Hind wings present or absent, but if present, then costal projections acute and not hooked (only rarely appearing slightly curved) |
Terminal segment of male forceps elongate in North American species, at least half as long as preceding segment | Terminal segment of male forceps variable |
Bi-lobed process present between bases of male forceps (except in Fallceon thermophilos, which has hind wings with broad costal projections producing modified, or slightly elevated, wing margins distal of costal projections) | Bi-lobed process absent |
Margins of hind wings distal of costal projections not modified (i.e. not elevated) | |
Remaining genera: Acerpenna, Americabaetis, Apobaetis, Baetis, Baetodes, Cloeodes, Diphetor, Moribaetis, Paracloeodes, and Plauditus | |
5 Example Specimens | |
Fallceon | Go to Couplet 13 |