Compare Surirella undulata
Compare
Surirella cruciata is heteropolar, lacks longitudinal undulations and has bi- to triseriate striae. Cymatopleura solea (=Surirella librile) has a constricted valve center.
LM scalebar = 10 µm
Length Range
64-133 µm
64-133 µm
Width Range
45-67 µm
45-67 µm
Striae in 10 µm
23-30
23-30
Surirella cruciata
Length Range
48–160 µm
48–160 µm
Width Range
24–61 µm
24–61 µm
Striae in 10 µm
19–29 in the center valve, 22–30 at the ends
19–29 in the center valve, 22–30 at the ends
Surirella librile
Length Range
56-280 µm
56-280 µm
Width Range
13-24 at the midsection, 15-36 at the broadest point µm
13-24 at the midsection, 15-36 at the broadest point µm
Striae in 10 µm
29-34
29-34