Knowledge Bank

A new quadrithecate diplocardian earthworm, Diplocardia varivescula, is described from southern Indiana. The species shares some attributes with Diplocardia invecta and D. koebeli, both of which are known only from Mexico. The new species differs from known species in position of the seminal vesicles, variability of spermathecal pores, setal sculpturing, pattern of genital tumescences, and distribution.