Photo 121191, (c) Ferran Jimenez Cortadelles, some rights reserved (CC BY-NC)

Attribution © Ferran Jimenez Cortadelles
some rights reserved
Uploaded by ferran ferran
Source MINKA
Original https://minka-sdg.org/photos/121191
Associated observations

Photos / Sounds

Observer

ferran

Date

March 20, 2021

Place

Spain (Google, OSM)

Description

Gyrosigma attenuatum (Kütz.) Rabh.
Perfil del frústul moderadament sigmoide, amb estries longitudinals ben marcades, creuant-se amb les transversals en 90º.
Rafe sigmoide que fineix a les extremitats distals girant en sentits oposats. L'àrea central és estreta, formant al centre una petita àrea ovalada longitudinalment.
Les dimensions del exemplar fotografiat són: 185 x 25 µm.
Estries longitudinals: 11 en 10 µm
Estries transversals: 12 en 10 µm.
L'aigua del riu al lloc de mostreig presenta un conductivitat de 890 µS/cm i un pH = 7.6.

Associated taxa
Sizes
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