Siphlonurus quebecensis
(Provancher, 1878)
early brown quill mayfly, gray drake
Siphlonurus quebecensis is a of primitive minnow mayfly in the Siphlonuridae. It occurs in North America and is known to anglers as the 'early brown quill' or 'gray drake,' a name reflected in fly-fishing patterns designed to imitate its form. The species is part of a group of mayflies whose aquatic nymphs and winged adults serve as important prey for trout and other sport fish.
Pronunciation
How to pronounce Siphlonurus quebecensis: /ˌsɪfləˈnʊrəs kwebɛˈsɛnsɪs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
are imitated by fly patterns using thread cross-hatched over caribou hair to simulate body segmentation, suggesting a slender, segmented . As a member of Siphlonuridae, it likely possesses the -typical traits of expanded, fan-like gills on the nymphal abdomen and two or three long at the tail. Distinguishing S. quebecensis from requires examination of detailed wing venation and genitalia; it is identified as an 'early' brown quill, implying seasonal separation from similar 'late' brown quill .
Distribution
North America; specifically recorded from the Nearctic region with distribution including Canada (Quebec, per the epithet) and the United States.
Seasonality
are active early in the season, as indicated by the 'early brown quill,' which distinguishes this from later-emerging .
Ecological Role
Aquatic nymphs and winged are prey for trout and other sport fish. The contributes to the component of aquatic that support freshwater fisheries.
Human Relevance
Significant to fly-fishing; S. quebecensis are imitated by artificial 'gray drake spinner' patterns. Professional fly crafters design specific patterns to match the body segmentation and silhouette of this , and anglers must match the size, silhouette, and color of the natural insect to be successful.
Similar Taxa
- Siphlonurus spp. (late brown quill group)Other Siphlonurus are known as 'late brown quills' and emerge later in the season; S. quebecensis is distinguished by its early seasonal appearance.
- Drunella grandis (green drake)Both are large mayflies imitated by drake patterns, but D. grandis belongs to a different (Ephemerellidae) and has different body coloration and wing characteristics.
More Details
Fly-tying significance
The is specifically mentioned in fly-fishing literature as the target of Julie Nielsen's 'gray drake spinner' pattern, which uses thread cross-hatched over caribou hair to simulate the body segmentation of the . This indicates the species has distinctive, visible abdominal segmentation that anglers must replicate.