Glossary terms starting with "e"

 

Elongate

Having notably more length than width. Having a long and slender shape.

 

Endemic

Native, or limited to a specific geographic area.

 

Endopelic

Algae which grow within the subsurface of sediments, clays, and silt.

Endosymbiotic

An organism that lives inside another, benefitting both individuals. For example, endosymbiotic cyanobacteria often inhabit living cells of the genus Epithemia.

 

Epilithic

Algae which grow on the surface of rock or stone.

 

Epipelic

Algae which grow on the surface of sediments, clays, and silt, i.e., residing at the water/sediment interface.

Epiphytic - periphyton

The growth habit of organisms that live on the surfaces of plants or other algae.

Epipsammic

The growth habit of living attached to sand grains, or moving through sand.

 

Epitheca

The larger theca of the frustule. The epitheca overlaps the hypotheca. A theca is composed of a valve and its associated cingulum. From Greek, theca means sheath or case (plural is thecae), so epitheca means outer sheath.