Table 1 Nervous system character matrix of the six investigated species. From the 27 defined characters, 23 were used in the ground pattern analysis. Two characters states were used in this matrix: present (1), absent (0) and (−) inapplicable
From: A comparative analysis of the nervous system of cheilostome bryozoans
| Â | Bugula neritina | Chorizopora brongniartii | Collarina balzaci | Electra posidoniae | Fenestrulina joannae | Myriapora truncata |
|---|---|---|---|---|---|---|
lophophoral base | ||||||
 cerebral ganglion/brain | 1 | 1 | 1 | 1 | 1 | 1 |
 circumoral nerve ring | 1 | 1 | 1 | 1 | 1 | 1 |
 trifid nerve | 1 | 1 | 1 | 1 | 1 | 1 |
  descending branch | 1 | 1 | 1 | 1 | 0 | 1 |
  annular branch | 1 | 0 | 0 | 1 | 0 | 1 |
 direct nerve origin sites | 0 | 0 | 0 | 0 | 0 | 0 |
 direct tentacle sheath nerve | 1 | 1 | 1 | 1 | 1 | 1 |
lophophore | ||||||
 radial nerves | 1 | 1 | 1 | 1 | 1 | 1 |
 abfrontal tentacle nerve | 1 | 1 | 1 | 1 | 1 | 1 |
 medio-frontal tentacle rootlets | 1 | 1 | 1 | 1 | 1 | 1 |
 medio-frontal tentacle nerve | 1 | 1 | 1 | 1 | 1 | 1 |
 latero-frontal tentacle nerve | 1 | 1 | 1 | 1 | 1 | 1 |
 intertentacular pits | 1 | 1 | 1 | 1 | 1 | 1 |
 intertentacular neurites | 1 | 1 | 1 | 1 | 1 | 1 |
visceral innervation | ||||||
 medio-visceral nerve | 1 | 1 | 1 | 1 | 1 | 1 |
 latero-visceral nerves | 1 | 1 | 1 | 1 | 1 | 1 |
 medio-latero-visceral nerve | 1 | 0 | 0 | 1 | 0 | 1 |
 pharyngeal plexus | 1 | 0 | 1 | 1 | 1 | 1 |
 visceral nerve origin site | 0 | 0 | 0 | 0 | 0 | 0 |
peripheral innervation | ||||||
 compound tentacle sheath nerve | 1 | 1 | 1 | 1 | 1 | 1 |
 parietal branching site | 1 | 1 | 1 | 1 | 1 | 1 |
 parietal muscle nerve | 1 | 1 | 1 | 1 | 1 | 0 |
 opercular branch | – | 1 | 1 | 1 | 1 | 1 |
 sphincter branch | 1 | 1 | 1 | 1 | 1 | 1 |
 parietodiaphragmatic branch | 1 | 1 | 1 | 1 | 1 | 1 |
remainder | ||||||
 interzooidal pores | 0 | 0 | 0 | 1 | 0 | 0 |