Compare

Delicata delicatula has narrower apices and a wider axial area. Delicata montana has rhombic-lanceolate valves and wider, unprotracted apices.

LM scalebar = 10 µm
Delicata Alpestris LM1 Delicata Alpestris LM2 Delicata Alpestris LM3 Delicata Alpestris LM4 Delicata Alpestris LM5 Delicata Alpestris LM6 Delicata Alpestris LM7
Length Range
17-51 µm
Width Range
4.6-7.5 µm
Striae in 10 µm
18-28 dorsal, 19-28 ventral

Delicata delicatula

(Kütz.) Krammer 2003

Delicata delicatula LM1 Delicata delicatula LM3 Delicata delicatula LMs Delicata delicatula LM4 Delicata delicatula LM5 Delicata delicatula LM6
Length Range
20-49.5 µm
Width Range
4.7-7.4 µm
Striae in 10 µm
17-24 dorsal, 19-27 ventral

Delicata montana

L.L.Bahls 2017

Delicata Montana 1 290102 Delicata Montana 2 290102 Delicata Montana 3 290102 Delicata Montana 4 290102 Delicata Montana 5 290102 Delicata Montana 6 290102 Delicata Montana 7 290102
Length Range
23-46 µm
Width Range
5.1-7.6 µm
Striae in 10 µm
16-18 center (dorsal) up to 24 at the apices; 18-25 ventral side