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Species Callibaetis pictus

Mayfly - Callibaetis pictus - female Mayfly - Callibaetis pictus Callibaetis pictus subimago - voucher specimen, in alcohol - Callibaetis pictus - male Callibaetis pictus? - Callibaetis pictus Callibaetis pictus? - Callibaetis pictus Callibaetis pictus?  - Callibaetis pictus Another Lick Observatory Mayfly - Callibaetis pictus Laguna Mnt Mayfly - Callibaetis pictus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Family Baetidae (Small Minnow Mayflies)
Genus Callibaetis
Species pictus (Callibaetis pictus)
Explanation of Names
Callibaetis pictus (Eaton 1871)
Identification
This species has a distinctive pale (usually W-shaped) dorsal marking on tergite 6, and all but the very darkest specimens (usually males) also have those markings on tergites 5 and 9. --Lloyd Gonzales
Range
e. & so. US & Mexico(1) map(2)