Cyanophora paradoxa

Cyanophora paradoxa is a freshwater species of Glaucophyte that is used as a model organism.^[3][4] C. paradoxa has two cyanelles or chloroplasts where photosynthesis occurs.^[3] Cyanelles are unusual organelles in that they retain a rudimentary peptidoglycan wall.^[5] The cyanelle genome of C. paradoxa strain LB 555 was sequenced and published in 1995.^[4][6] The nuclear genome was also sequenced and published in 2012.^[7]

Cyanophora paradoxa
C. paradoxa showing cyanelles in binary fission, nucleus and flagella. Scale bar, 10 µm.
Scientific classification
Clade:	Archaeplastida
Division:	Glaucophyta
Class:	Glaucophyceae
Order:	Glaucocystales
Family:	Glaucocystaceae
Genus:	Cyanophora
Species:	C. paradoxa
Binomial name
Cyanophora paradoxa Korshikov, 1924[1][2]

Description

Cyanophora paradoxa is a unicellular organism with two flagella, attached near the tip of the cell. The cell body is about 7-15 μm long by 3-6 μm wide; it is roughly ovoid (egg-shaped) in shape, and is covered in ridges that outline triangular or crescent-shaped "fenestrations". Each cell generally has one or two cyanelles.^[8]