- athecal
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adj. [Gr. a, without; theke, case](ANNELIDA)Without spermathecae.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
copulatory chaetae — (ANNELIDA: Oligochaeta) Those that appear near or in the same segment as the spermathecae in earthworms; sometimes referring to similar setae in an adjacent, but athecal segment … Dictionary of invertebrate zoology