Orconectes virilis ( Hagen, 1870 )

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 127

Orconectes virilis ( Hagen, 1870)

( Fig. 30N)

Cambarus virilis Hagen, 1870: 63 , pl. I, figs. 23–28, pl. II, figs. 128–132, pl. III, fig.155; pl.VIII.

Orconectes virilis . — Hobbs 1976: 91, fig. 72h. — Daniels 1980: 131. — Fetzner 1996: 114, 116, 119. — Johnson & Johnson 2008: 47, photo page 54. — Larsen & Olden 2011: 66, p. 69 fig. C.

Diagnosis. Rostrum with dorsal groove, acute apex well removed from pair lateral teeth. Carapace with sharp cervical spines, prominent antennal angle. Pereopod 1 merus with large tooth near articulation with carpus, smaller teeth on mesial surface, carpus with two large teeth on mesial side. Major chelae with dorsal groove, double row of tubercles on dorsomedial side of palm in adult male; fingers straight, cutting edges lined by blunt teeth, double row of tubercles along mesial side of movable finger; Male with hooks on ischia of pereopod 3. Copulatory structures of male forked, deeply divided, apices of forks well separated, curving posteriorly. Annulis ventralis of female with high, narrow anterior wall divided by fissure, median depression wide, deep. Carapace length to more than 20 mm.

Color in life. Carapace, abdomen greenish-brown; claws, walking legs bluish-green; apices of chelae orange; see Johnson & Johnson (2008: 54) for good color photographs.

Habitat and depth. Lakes, rivers and streams, especially in swiftly moving, turbid water, shore to 20 m.

Range. Native to Canada and northeastern and north-central United States, but widely distributed throughout United States, either originally or through human introduction. Many records in California. Type locality not specified; original material came from Lake Superior, Lake Winnipeg, Saskatchewan, Red River and Toronto , Canada; Quincy , Illinois ; Davenport and Burlington , Iowa ; Miami River , Dayton , Ohio ; Osage River , Missouri ; Sugar River , Wisconsin ; and San Gabriel River , Texas .