Belted Crayfish

Orconectes harrisoni
Cambaridae (freshwater crayfish) in the order Decapoda (shrimp, crabs and lobsters)

This medium-small, tan crayfish has a distinctive pattern of alternating olive-green and reddish-brown bands on the abdominal segments. Another unique feature is the presence on the carapace of a broad, blackish band that spans the cervical groove (groove separating head and thorax). The pincers are narrow for a stream crayfish but are not especially long.

Adult length: 1 1/2 to 2 1/2 inches.
Habitat and conservation: 
Inhabits clear, permanent streams ranging from medium-sized creeks to large rivers. It prefers permanent flow, no strong current and a substrate of coarse rock. In daylight, this active, agile species usually hides beneath rocks. It forages at night.
Distribution in Missouri: 
Occurs in the Big River and its tributaries of the eastern Ozarks. Also occurs in the Meramec, just downstream from the mouth of the Big River.
Found only in Missouri's eastern Ozarks, and nowhere else in the world.
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