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Sphaeropleaceae 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 ...
of
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 Sphaeropleales. The Sphaeropleaceae consists of solitary cells or filaments of cells. They are coenocytic, and reproduce asexually via zoospores or sexually via anisogamy or oogamy. The family has had a convoluted taxonomic history. Depending on the author, it has been placed in one of many orders including Ulotrichales or Chaetophorales. Currently, it is placed in its own order, the Sphaeropleales. It appears to be the
sister group In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and ...
to the rest of the families in its order. It also differs from the other families in the ultrastructure of the basal bodies of their flagella.


References

Chlorophyceae families Sphaeropleales {{Chlorophyceae-stub