absent | |
present |
with diverticulum | |
without diverticulum |
absent | |
present |
bursal canal absent | |
curves distinctly anteriad | |
without anteriad curvature |
infranucleate | |
nucleate |
1 lens per eye cup | |
3 lenses per eye cup | |
eye lenses absent |
absent | |
present |
auricles | |
rounded |
absent | |
present |
absent | |
present |
at a distance behind brain | |
close behind the brain | |
directly behind the brain |
postpharyngeal | |
prepharyngeal | |
throughout major part of body |
at anterior end pharynx pocket | |
at middle pharyngeal pocket | |
at posterior end phar. pocket |
1 | |
2 | |
3 |
no | |
yes |
common | |
separate |
anterior | |
not applicable | |
posterior |
anterior to pharynx | |
lateral to pharynx | |
posterior to pharynx |
in dorsal part of body | |
in ventral part of body | |
occupying entire space of body |
absent | |
present |
absent | |
present |
absent | |
present |
absent | |
present |