Calyx (zoology)

Calyx is a term used in animal anatomy for some cuplike areas or structures.

Cnidarians

The spicules containing the basal portion of the the upper tentacular part of the polyp of some soft corals (also called "calice").

Entoprocta

A body part of the Entoprocta from which tentacles arise and the mouth and anus are located [R.C.Brusca, G.J.Brusca. Invertebrates. Sinauer Associates, 2 ed.(2003)] .

Echinoderms

The body disk that is covered with a leathery tegumen containing calcareous plates (in crinoids and ophiuroids the main part of the body where the viscera are located) [A.R.Maggenti et al., Online Dictionary of Invertebrate Zoology, digitalcommons.unl.edu, 2005] .

Insects

In male insects, a funnel-shaped expansion of the basal part of the "vas deferens" (part of the seminal duct). Also in entomology, a flattened cap of neuropile in an insect brain (a component of the corpus pedunculatum) and by certain female insects, an expansion of the oviduct into which the ovarioles open.

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