Mayfly Species Maccaffertium terminatum
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Heptageniidae (March Browns, Cahills, Quill Gordons)
» Genus Maccaffertium (March Browns and Cahills)
» Species terminatum
Where & When
The Mayflies of the United States webpage shows this species distributed across the East and Midwest and West into the Rockies, although not quite to the Pacific slope.Hatching Behavior
Time Of Day (?): EveningSpinner Behavior
Time Of Day: Evening
I collected a male and female mating while flying downstream over the tail of a long flat, not in part of any concentrated swarm over a riffle. I saw many of the females flying over the water and dipping down to lay their eggs.3 Mayfly Specimens in the Species Maccaffertium terminatum:
Maccaffertium terminatum Mayfly Spinner
View 11 PicturesI positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.
I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.
View 11 PicturesI positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.
Region: Catskills
Collected Jun 7, 2007
Added Jun 8, 2007
Maccaffertium terminatum Mayfly Dun
View 6 PicturesBased on the identical size, shape, and relative proportions of different body parts, I'm pretty sure this dun is of the same species as two spinners I collected at about the same time. The color is dramatically different, but that's to be expected with many of these species in the transition from dun to spinner.
View 6 PicturesBased on the identical size, shape, and relative proportions of different body parts, I'm pretty sure this dun is of the same species as two spinners I collected at about the same time. The color is dramatically different, but that's to be expected with many of these species in the transition from dun to spinner.Region: Catskills
Collected Jun 7, 2007
Added Jun 8, 2007
Maccaffertium terminatum Mayfly Spinner
View 5 PicturesI was able to identify this female because I captured her while she was mating with an identifiable male.
View 5 PicturesI was able to identify this female because I captured her while she was mating with an identifiable male.Region: Catskills
Collected Jun 7, 2007
Added Jun 8, 2007
Recent Discussions of Maccaffertium terminatum
Anybody know more about Maccaffertium terminatum? 3 Replies »
I just wrote up what I found on the page for this species. I was mildly surprised to see so many of a species I've never seen mentioned in an angling context -- at least a few dozen throughout the evening. They piqued my curiosity.
Reply
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