Compare Cavinula maculata
Compare
Cavinula maculata resembles C. scutiformis in size, striae orientation, and in regard to the enlarged and thickened central nodule. The valve outline of C. maculata is, however, elliptic-lanceolate rather than elliptic as in C. scutiformis and the central area is conspicuously larger. The axial area of C. maculata is also narrower and more linear. Areolae around the central area in C. scutiformis are usually transversely elongated, while they are small and circular in C. maculata.
LM scalebar = 10 µm
Length Range
25-41 µm
25-41 µm
Width Range
15-20 µm
15-20 µm
Striae in 10 µm
20-25
20-25
Cavinula scutiformis
Length Range
18-36 µm
18-36 µm
Width Range
12.3-17.7 µm
12.3-17.7 µm
Striae in 10 µm
24-26 at the valve center, 28-32 near the apices
24-26 at the valve center, 28-32 near the apices