Hex Mayflies
Hexagenia limbata
The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
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As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
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Caddisfly Genus Macrostemum (Glossy Wing Sedges)
Macrostemum zebratum is by far the most important species in this genus.
These fast-water caddisflies are unusually elegant; they have shiny, dark metallic-colored bodies and goossy wings.
These fast-water caddisflies are unusually elegant; they have shiny, dark metallic-colored bodies and goossy wings.
Genus Range
Discussions of Macrostemum
Zebra Caddis
1 replies
Posted by Lastchance on Aug 4, 2008 in the species Macrostemum zebratum
Last reply on Aug 4, 2008 by Taxon
Is there a photo of one? I've never heard of them or perhaps I know them by a different name.
Start a Discussion of Macrostemum
References
- LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
Caddisfly Genus Macrostemum (Glossy Wing Sedges)
Taxonomy
Species in Macrostemum: Macrostemum carolina, Macrostemum zebratum
1 species (Macrostemum transversa) isn't included.