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Related to pyriform apparatus: paracystic, acephalogastria, hemiapraxia
a pear-shaped structure within the eggshell of certain tapeworms (family Anoplocephalidae), of uncertain function.
pair of triangular structures in the eggs of anoplocephalid tapeworms surrounding the oncosphere.
a swelling on the ventral surface of the brain, made up of the combined lateral olfactory gyrus and the hippocampal gyrus.