During the late fall and early winter of 2007, we collected intertidal barnacles and observed reproductive activity. Among these, we found an otherwise normal barnacle that had two penises. At least one of these penises is inferred to have retained normal function and to have fertilized the egg brood of the barnacle's neighbor.
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1 February 2009
An Individual Barnacle, Semibalanus balanoides, with Two Penises
J. Matthew Hoch,
Brian Yuen
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Journal of Crustacean Biology
Vol. 29 • No. 1
February 2009
Vol. 29 • No. 1
February 2009
Barnacle
Hemipenes
mating
penis
Semibalanus balanoides