👉 Cenocephalus, also known as the "mushroom" brain, is a type of brain that lacks the primary or cerebral cortex (the part of the brain responsible for thinking and consciousness). It is characterized by an array of small, round structures called neocortexes, which are located in the ventral surface of the skull. These neocortexes are thought to be responsible for various cognitive functions such as perception, memory, and decision-making.