LOGO River diatoms: a multiaccess key
[Home] [Taxa] [Characters] [Environment] [Credits] [Introduction] [Manual] [Glossary]

You are in: Home>>character sets>>Other features>>Apical pore fields

Apical pore fields


State: Present at one pole

Tabellaria flocculosa

Gomphonema tergestinum Scale bar: 2 µm

Valve view Brightfield Gomphonema tergestinum

Tabellaria flocculosa

Description
Present at foot pole only.


State: Present at two poles

Tabellaria flocculosa

Tabellaria flocculosa The apical pore field is clearly visible at one end (arrowed) and just visible at the other (damaged) end of the valve.


State: Absent

valve view Brightfield Cavinula variostriata

Comments to: Diatom Key Development Team