Virile Crayfish (Northern Crayfish) Missouri Department of Conservation

The virile crayfish (or northern crayfish) is reddish brown or green, without prominent markings. The pincers are green or blue green with orange tips; in adults, the pincers are conspicuously studded with whitish or yellowish knobs. Paired dark blotches run lengthwise along the abdomen. The rostrum (pointed, noselike structure between the eyes) has conspicuous notches or spines near its tip. The virile crayfish is the largest of the crayfish in the Prairie Region and in the state. Similar species: The calico (or papershell) crayfish differs from this species in having pincers that are gray, purple, or pink, a pale lengthwise stripe along the middle of the carapace and abdomen, and a rostrum without lateral notches or spines. The spothanded crayfish usually has a dark spot at the base of the movable finger and a saddle mark at the back edge of the carapace.

Virile Crayfish - Montana Field Guide

Until recently, only four US species received protection under the

Northern crayfish Washington Department of Fish & Wildlife

Virile Crayfish (Northern Crayfish) Missouri Department of Conservation

Crustaceans - Pipestone National Monument (U.S. National Park Service)

Search Results - Field Guide Missouri Department of Conservation

Virile Crayfish (Northern Crayfish)

Vernal Crayfish Missouri Department of Conservation

Virile Crayfish (Orconectes virilis)

Crayfishes Missouri Department of Conservation

Crayfish Conservation in Missouri

The State of Crayfish in the Pacific Northwest - Larson - 2011

Faxonius virilis (virile crayfish)

Crayfish of the Prairie Region of Missouri