procephalon
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procephalon — pro·cephalon … English syllables
Arthropod head problem — The arthropod head problem is a long standing zoological dispute concerning the segmental composition of the heads of the various arthropod groups, and how they are evolutionarily related to each other. While the dispute has historically centered … Wikipedia
procephalic lobes — (ARTHROPODA: Insecta) In embryology of the cephalic region, expansion of the neural ridges forming the future brain and divided into three neuromeres, known as proto , deuto and tritocerebrum; procephalon … Dictionary of invertebrate zoology
