Enigmatic eukaryote taxa

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thumb|Electron micrograph of T. rivulare

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.]]

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.

species