Pseudoscourfieldiaceae, formerly Pycnococcaceae is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

green algae The green algae (: green alga) are a group of chlorophyll-containing autotrophic eukaryotes consisting of the phylum Prasinodermophyta and its unnamed sister group that contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ...

in the order

Pseudoscourfieldiales Pseudoscourfieldiales is an order of green algae in the class Pyramimonadophyceae Pyramimonadophyceae is a class of green algae in the division Chlorophyta Chlorophyta is a division of green algae informally called chlorophytes. Descri ...

. The defining features of this family include the single invagination of the

pyrenoid Pyrenoids are sub-cellular phase-separated micro-compartments found in chloroplasts of many algae,Giordano, M., Beardall, J., & Raven, J. A. (2005). CO2 concentrating mechanisms in algae: mechanisms, environmental modulation, and evolution. ''An ...

where the

mitochondrial A mitochondrion () is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate (ATP), which is used ...

membrane fits into it and the "decapore" - a ring of 10 pores through the thick

cell wall A cell wall is a structural layer that surrounds some Cell type, cell types, found immediately outside the cell membrane. It can be tough, flexible, and sometimes rigid. Primarily, it provides the cell with structural support, shape, protection, ...

. The family was renamed to Pseudoscourfieldiaceae in 2024 by Crépeault et al., who also determined via ptDNA and mtDNA analyses, that ''Pycnococcus provasolii'' is a junior synonym of ''Pseudoscourfieldia marina''.

References

Chlorophyta families Pyramimonadophyceae {{green algae-stub