brain

(Order Notostraca):

Main concentration of nreve tissue in head; consists of supraesophagael ganglion (protocerebrum and deutocerebrum) and, posterior to mouth, tritocerebrum (ganglion of antennal somite). Continues posteriorly as ladder-like ventral nerve cords [Stachowitsch, 1992].

(Order Diplostraca):

Main concentration of nerve tissue in head. Consists basically of ganglion (supraesophageal ganglion = protocereberum + deutocerebrum) anterior to esophagus and ganglion (tritocerebrum) to side of or posterior to esophagus. Continues posteriorly as ladder-like ventral nerve cord [Stachowitsch, 1992].

(Order Diplostraca):

main concentration of nerve tissue in head. Consists basically of ganglion (supraesophageal ganglion = protocerebrum and deuterocerebrum) anterior to esophagus and ganglion (tritocerebrum = circumesophageal ganglion = ganglion of antennal somite) to each side of or posterior to esophagus. Continues posteriorly as ladder-like ventral nerve cord [Stachowitsch, 1992].

(Order Anostraca):

Main concentration of nerve tissue; consists of supraesophageal ganglion (protocerebrum, deuterocerebrum) and, posterior to mouth, tritocerebrum (ganglion of antennal somite) [Stachowitsch, 1992].

(Class Cephalocarida):

Main concentration of nerve tissue in cephalon. Connected with "eyes" by optic nerves and continues posteriorly to form subesophageal ganglion [Stachowitsch, 1992].

(Order Cumacea):

Supraesophageal ganglion [Stachowitsch, 1992].

(Order Decapoda):

Supraesophageal ganglion [Stachowitsch, 1992].

(Order Amphipoda):

Supraesophageal ganglion [Stachowitsch, 1992].

(Order Isopoda):

Supraesophageal ganglion [Stachowitsch, 1992].

(Order Leptostraca):

Supraesophageal ganglion [Stachowitsch, 1992].

(Subclass Branchiura):

Supraesophageal ganglion [Stachowitsch, 1992].

(Subclass Cirripedia):

Supraesophageal ganglion [Stachowitsch, 1992].

(Subclass Copepoda):

Supraesophageal ganglion [Stachowitsch, 1992].

(Subclass Mystacocarida):

Main concentration of nerve tissue in cephalon. Consists of anterior protocerebrum, median deutocerebrum (ganglion of antennular somite), and, at some distance posterior to deutocerebrum, a tritocerebrum (ganglion of antennal somite). Surrounds esophagus and gives rise to pair of ventral nerve cords [Stachowitsch, 1992].

(Class Ostracoda):

Supraesophageal ganglion [Stachowitsch, 1992].

(Class Remipedia):

Main concentration of nerve tissue located above foregut in anterior region of head (cephalon); connected to ventral nerve cord by pair of circumesophageal commissures. (Syn. supraesophageal ganglion) [Stachowitsch, 1992].

(Order Thermosbaenacea):

Main concentration of nerve tissue above (anterior to) esophagus. Continues posterior to esophagus as ventral nerve cord. (Syn. supraesophageal ganglion) [Stachowitsch, 1992].

(Order Euphausiacea):

Supraesophageal ganglion [Stachowitsch, 1992].