Definitions
Protocerebrum
- Ganglion of first (preantennulary) somite. [Moore and McCormick, 1969]
 - Ganglion of preantennulary region. [McLaughlin, 1980]
 - One of two anterior dorsal supraesophageal ganglia in the crustacean brain; receives the optic nerves. [Brusca and Brusca, 2002]
 - (Taxon-specific: ) Supraesophageal ganglion. [Stachowitsch, 1992]
 - (Taxon-specific: Family Pycnogonidae) Brain. [Stachowitsch, 1992]
 - Supraesophageal ganglion. [Stachowitsch, 1992]
 - Brain. [Stachowitsch, 1992]
 
