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Mayfly Genus Cinygmula (Dark Red Quills)

Taxonomic Navigation -?-
Species in CinygmulaNumber of SpecimensNumber of Pictures
Cinygmula mimus34
Cinygmula ramaleyiSmall Western Gordon Quill532
Cinygmula reticulataWestern Ginger Quill22
Cinygmula subaequalisSmall Gordon Quill213

6 species aren't included.
Common Name
MatchCommon Name
***Dark Red Quills
Pictures Below
This is primarily a Western genus. Cinygmula ramaleyi is the most important species, producing good hatches in the West. Cinygmula reticulata may also be relevant.

There is only one Eastern species, Cinygmula subaequalis, and its importance is minor.

Hatching Behavior


Most Cinygmula duns emerge in the surface film, but in some cases they may escape their nymphal shucks (
Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
Here's an underwater view of the pupal shucks of several already-emerged Brachycentrus numerosus caddisflies.
Shuck: The shed exoskeleton left over when an insect molts into its next stage or instar. Most often it describes the last nymphal or pupal skin exited during emergence into a winged adult.
)
while still drifting to the surface.

Spinner Behavior


Cinygmula spinner falls are too sporadic to be important.

Nymph Biology


Cinygmula nymphs can withstand slower water than many of the other genera in the Heptageniidae family.

Pictures of 20 Mayfly Specimens in the Genus Cinygmula:

Specimen Page:123
Cinygmula subaequalis (Small Gordon Quill) Mayfly NymphCinygmula subaequalis (Small Gordon Quill) Mayfly Nymph View 10 PicturesThis nymph is missing a few gills, but is otherwise in good shape. It was the only one of its species which turned up in my sample.
Collected May 29, 2007 from Paradise Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Cinygmula (Dark Red Quills) Mayfly NymphCinygmula (Dark Red Quills) Mayfly Nymph View 7 PicturesThis very strange nymph appears to be undoubtedly Cinygmula, yet it lacks the telltale protruding mouthparts that usually make that genus so easy to identify.
Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011
Cinygmula (Dark Red Quills) Mayfly NymphCinygmula (Dark Red Quills) Mayfly Nymph View 8 PicturesThis nymph was one of many I collected with vivid white or semi-transparent markings on the front of the head, the sides of the pronotum (Pronotum: The top of the insect prothorax.), and the last abdominal segments.
Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011
Specimen Page:123

Recent Discussions of Cinygmula

Red Heptagenia? 30 Replies »
Posted by GONZO on Jul 19, 2011
Last reply on Jul 24, 2011 by PaulRoberts
The gills and protruding mouthparts make me think that this might be Cinygmula. I've seen red phase Rhithrogena nymphs, but have never seen this coloration in Cinygmula (or Heptagenia).
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