Diatoms of North AmericaDiatoms of North America

Glossary

Like the rest of this website, the glossary is a work in progress. If we’ve missed a term, please contact us to let us know the term and references.

Distal raphe

A distal raphe is the portion of a raphe branch near the valve end, or valve apex.

See also proximal raphe.

Encyonema Distal
Image Credit: Sarah Spaulding
Valve apex of a species in the genus Encyonema (LM). The arrow indicates the distal raphe, which is ventrally deflected.
Diploneis Distal Raphe
Image Credit: Ditmar Metzeltin
External view of a valve of Diploneis (SEM). The two arrows show the distal raphe ends, which are unilaterally (to the same side) deflected.
${index}
${customer.name}

Diatoms of North America is running a fundraising campaign to keep the servers in operation. We need you to reach our $25,000 fundraising goal.

If you use and appreciate DONA, make your DONAtion today.

For the Gift Designation, type "diatom" in the search box and select "Diatom Lab Research Fund". This is the designated fund for diatoms.org.

Donate today