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Cavinula davisiae valves are more lanceolate, with coarsely punctate striae. Cavinula cocconeiformis valves are more lanceolate and the central area is smaller and an apically expanded oval shape. Genkalia digitulus is superficially similar, but valves are much smaller.

LM scalebar = 10 µm
Cavinula variostriata LM6 Cavinula variostriata LM4 Cavinula variostriata LM3 Cavinula variostriata LM1 Cavinula variostriata LM5 Cavinula variostriata LM2
Length Range
16-35 µm
Width Range
7-8 µm
Striae in 10 µm
24-28

Cavinula davisiae

Bahls 2013

Cavinula davisiae LM1 Cavinula davisiae LM2 Cavinula davisiae LM3 Cavinula davisiae LM4 Cavinula davisiae LM5 Cavinula davisiae LM6 Cavinula davisiae LM7
Length Range
14-31 µm
Width Range
7.5-9.9 µm
Striae in 10 µm
26-32

Cavinula cocconeiformis

(Gregory ex Grev.) D.G.Mann and Stickle in Round, R.M.Crawford and D.G.Mann 1990

Cavinula cocconeiformis LM7 Cavinula cocconeiformis LM1 Cavinula cocconeiformis LM2 Cavinula cocconeiformis LM3 Cavinula cocconeiformis LM4 Cavinula cocconeiformis LM5
Length Range
9-28 µm
Width Range
6-9 µm
Striae in 10 µm
26-32 in the center valve, 28-34 at the ends

Genkalia digitulus

(Hust.) Lange-Bert. and Kulikovskiy 2012

Genkalia Digitulus Me10023 A 101817 74 C Genkalia Digitulus Me10010 A 102417 02 C Genkalia Digitulus Me10009 C 101317 186 Genkalia Digitulus Nh10066 A 121117 11 C Genkalia Digitulus Me10023 A 101817 35 C Genkalia Digitulus Me10023 A 101817 31 C Genkalia Digitulus Cthp001 A 112117 68 C
Length Range
8.9-18.2 µm
Width Range
3.8-4.6 µm
Striae in 10 µm
28-33