Cinygmula subaequalis (Small Gordon Quill) Mayfly Nymph Pictures

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Heptageniidae (March Browns, Cahills, Quill Gordons)

» Genus Cinygmula (Dark Red Quills)

» Species subaequalis (Small Gordon Quill)

I had heard reports of a bright red heptageniid nymph before but never seen one until I found this early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) specimen in a very high water quality small stream in the Catskills.

This mayfly was collected from Mongaup Creek on April 19th, 2006 and added to Troutnut.com on April 21st, 2006.

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Far from mature, this nymph is a whopping 4mm long.

AuthorTroutnut

CameraCanon EOS 20D

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Cinygmula subaequalis (Small Gordon Quill) Mayfly Nymph from Mongaup Creek in New York

AuthorTroutnut

CameraCanon EOS 20D

View Full Size and Comment (2X larger)

AuthorTroutnut

CameraCanon EOS 20D

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Jargon Defined:

Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).