Mag. 400x
To my eye, the terminal apices of the two end cells in the chain (chain of 3 cells) are club-shaped rather than spatulate as described here https://desmids.nl/maand/english/gonatozygon_aculeatum.html. This feature argues for an ID of G. aculeatum.

• A pond edge water sample (freshwater) was taken on 2/9/2022 using a 10 micron dip net to enrich for microorganisms. Air temp. 41C. Sampling area was free of ice due the water flow through a nearby culvert.