Compare Neidium distinctepunctatum
Compare
Coarse areolae separate this taxon from several species within the genus. Similar taxa include N. bobmarshallensis, N. undulatum, and N. kozlowii.
Neidium bobmarshallensis is larger (60-79 µm), wider (14.8-17.8 µm) and has a higher stria density (13-15 in 10 µm).
Neidium undulatum
is much larger (82-110 µm) and wider (23-26 µm). The axial area is wide,
with a row of depressions along one side of each raphe branch. The
central area is diagonal, with disorganized depressions near the margin.
Neidium kozlowii has wider valves and a narrow axial area. Both N.. kozlowii and N. kozlowii var. ellipticum have straight proximal raphe ends, with round or oblique central fascia and smaller areolae.
LM scalebar = 10 µm
Length Range
32-70 µm
32-70 µm
Width Range
12-21 µm
12-21 µm
Striae in 10 µm
10-12
10-12
