13a
A First form male gonopod terminal elements gently bent at an
angle of approximately 30 degrees, and extremely long; B
cephalic base of central projection without a right angle shoulder;
C areola width narrow; D female annulus ventralis
possesses a distinct deep cavity shape; greenish color head and chela,
chestnut brown color carapace, with large yellow tubercles on chela
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Orconectes (G.) virilis
13b A First form male gonopod terminal elements
straight, Bcephalic base of central projection of gonopod
with right angle shoulder, gonopods short; C areola width
wide; D female annulus ventralis less deep, more flattened
and sculptured
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Orconectes (C.) obscurus
Note: use annulus ventralis pictures carefully, variations
are present
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Dr. Tom Jones