**Caddisfly Genus Brachycentrus (Grannoms)**

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Trichoptera (Caddisflies)

» Family Brachycentridae (Apple Caddis and Grannoms)

» Genus Brachycentrus (Grannoms)

Species in Brachycentrus
Brachycentrus americanusAmerican Grannom	3	32
Brachycentrus appalachiaApple Caddis	3	30
Brachycentrus fuliginosusGrannom	0	0
Brachycentrus lateralisStriped Grannom	0	0
Brachycentrus nigrosomaGrannom	0	0
Brachycentrus numerosusDark Grannom	0	0
Brachycentrus occidentalisMother's Day Caddis	0	0

7 species aren't included.

Common Name

Match	Common Name
	Grannoms

Pictures Below ↓

This is page 2 of specimens of Brachycentrus. Visit the main Brachycentrus page for:

The behavior and habitat of Brachycentrus.
3 underwater pictures of Brachycentrus.

Pictures of 7 Caddisfly Specimens in the Genus Brachycentrus:

Specimen Page:12

Brachycentrus appalachia (Apple Caddis) Caddisfly Adult

View 5 Pictures

Collected May 7, 2005 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on May 16, 2006

Female Brachycentrus americanus (American Grannom) Caddisfly Adult

View 1 PicturesSize 11 mm. Prior to this photo the specimen dropped its large egg mass that was a very dark (almost black) olive sphere almost twice the diameter of the abdomen. Notice the abdomen visible through the wings is both thickened and shortened post egg drop.

Collected October 15, 2011 from the Fall River in California
Added to Troutnut.com by Entoman on October 21, 2011

Brachycentrus americanus (American Grannom) Caddisfly Larva

View 18 PicturesThis species of Brachycentrus was extremely common in mid-September kick net samples in the Yakima canyon.

Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020

Brachycentrus americanus (American Grannom) Caddisfly Larva

View 13 PicturesBoth the genus ID (Merritt & Cummins) and species ID (Flint 1984) are pretty confident for this larva, a nice example of a common western caddisfly. It was by far the most abundant insect in my kicknet sample on this trip, and many of the rocks in the fast riffle where I sampled had dozens of these larvae clinging on.

Collected July 6, 2020 from the Dosewallips River in Washington
Added to Troutnut.com by Troutnut on July 12, 2020

Specimen Page:12

Jargon Defined:

Abdomen: The rear and usually the longest (ten-segmented in mayflies) portion of an insect's body, to which the tails are attached.

Larva: Many classes of aquatic insects, such as caddisflies, midges, craneflies, dobsonflies, alderflies, and many more, are known as "larvae" rather than "nymphs" in their juvenile stages. They have mostly soft bodies rather than hard exoskeletons. These insects also advance through a "pupa" stage before reaching adulthood.

Useful References:

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.

Schwiebert, Ernest G. 1955. Matching the Hatch. MacMillan Publishing Company.

Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.