n. [Gr. anatrepein, to turn over]1. Increase of movement during blastokinesis.2. (ARTHROPODA: Insecta)
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
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katatrepsis — n. [Gr. kata, down; trepein, to turn] 1. (ARTHROPODA: Insecta) In blastokinesis, the movement of the embryo inside the egg from one pole to another. 2. Refers to different activities in different groups of insects, i.e., dorsal to ventral,… … Dictionary of invertebrate zoology