''Acicularia'' is a genus of

green algae The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ( Embryophytes) have emerged deep in the Charophyte alg ...

in the family

Dasycladaceae The Dasycladaceae is one of the two extant families of green algae of the order Dasycladales. When found in Palaeozoic limestones, they typically indicate depositional depth of less than 5m.See the NCBIbr>webpage on Dasycladaceae Data extract ...

References

Ulvophyceae genera Dasycladaceae Fossil algae {{Ulvophyceae-stub