Coscinodiscophyceae

The Coscinodiscophyceae are a class of diatoms. They are similar to the Centrales, a traditional, paraphyletic subdivision of the heterokont algae known as diatoms. The order is named for the shape of the cell walls (or valves or frustules) of centric diatoms, which are circular or ellipsoid in valve view. The valves often bear radially symmetrical ornamental patterns that can appear as dots when viewed with an optical microscope. Some also bear spines on their valves, which may either increase cell surface area and reduce sinking, or act as a deterrent to zooplankton grazers. Unlike pennate d

thumb|upright=1.2| Phytoplankton – such as this colony of Chaetoceros socialis – naturally give off fluorescent light as they dissipate excess solar energy that they cannot consume through photosynthesis. thumb|upright=1.2|Bright-field microscopy image of epiphytic cyanobacterial symbiont [[Calothrix rhizosoleniae SC01 9 (indicated by arrows) attached to a host diatom Chaetoceros sp. (c). Scale bar, 50 μm.]]

REDIRECT Biddulphiaceae

Triceratiales is a order of diatoms.

Biddulphiaceae is a family of diatoms, the only family in the order Biddulphiales. The Biddulphiaceae are distinguished from the Eupodiscaceae by their pseudocelli, where the Eupodiscaceae have fully developed ocelli. Both families commonly inhabit the littoral zone of the ocean, close to the shore. Sixteen species of Biddulphiaceae are found on the west coast of India.

Attheya is a genus of small single celled diatoms. Some of these species were earlier regarded to belong to Chaetoceros, or to Gonioceros, the taxonomic status of some of these species are still debated.

Hemiaulaceae is a diatom family. Species live between -1.86 and 29.47 degrees Celsius and at depths of up to 2010 meters.

Cerataulina is a diatom genus. Cerataulina is similar to another genus of the family Hemiaulaceae, Eucampia. Cerataulina inhabits coastlines and estuaries. Cerataulina was originally classified as Syringigium in 1980 by Hasle & Syvertsen.