With terminal heterocysts, mature trichomes taper from base near heterocyst to tip

Depth range based on 19 specimens in 17 taxa.

Environmental ranges
  Depth range (m): 0 - 6.395

Graphical representation

Depth range (m): 0 - 6.395
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Calothrix is prey of:
Eriopterini
Oligo II
Lumbriculidae pink
Polypedellum II
Zelandobius
Zelandotipula
Cristaperla fimbriae
Aphrophila neozelandiae
Austrosimulium australense
Paracalliope fluviatalus
Phreatoicus prasinia
Stictocladius
Isopoda
Tipula abdominalis
Baetis
Diplectrona modesta
Dixella
Leucrocuta
Leuctra
Stempelinella
Deleatidium
Forcipomyiinae
Stictocladius I
Aoteapsyche colonica
Aoteapsyche raruraru
Potamopyrgus antipodarum
Brillia

Based on studies in:
New Zealand: Otago, Akatore, Akatore catchment (River)
New Zealand: Otago, Berwick, Meggatburn (River)
New Zealand: Otago, Narrowdale catchment (River)
New Zealand: Otago, Catlins, Craggy Tor catchment (River)
USA: North Carolina, Coweeta (River)
USA: Maine, Troy (River)
New Zealand: Otago, Sutton Stream, Taieri River, Sutton catchment (River)
USA: Maine, Martins (River)

This list may not be complete but is based on published studies.