Compare Semiorbis hemicyclus
Semiorbis hemicyclus is most similar to S. eliasiae and these taxa could easily be confused as the size range and morphometrics are overlapping. In general, S. eliasiae is greater in width and has a lower stria density.
Semiorbis rotundus values are much more curved.
Semiorbis catillifera has an undulation on the dorsal side at the valve middle. Valves have less curvature.
LM scalebar = 10 µm
Length Range
11.7-28.1 µm
11.7-28.1 µm
Width Range
2.5-4.5 µm
2.5-4.5 µm
Striae in 10 µm
11-14
11-14
Length Range
16.5-40.5 µm
16.5-40.5 µm
Width Range
3.5-5.7 µm
3.5-5.7 µm
Striae in 10 µm
8-12
8-12
Length Range
32.9-45.1 µm
32.9-45.1 µm
Width Range
3.9-4.8 µm
3.9-4.8 µm
Striae in 10 µm
12-13
12-13
Length Range
17-40 µm
17-40 µm
Width Range
4.8-5.3 µm
4.8-5.3 µm
Striae in 10 µm
12-13
12-13
