Compare Karayevia ploenensis var. gessneri
Compare
Karayevia amoena and K. nitidiformis are more narrow in width, ends are more capitate, and a longitudinal hyaline line is present on the raphe valve. Karayevia gessneri has slightly wider valves. Note that Karayevia ploenensis has not been verified in the US.
LM scalebar = 10 µm
Length Range
11-16 µm
11-16 µm
Width Range
4.8-5.6 µm
4.8-5.6 µm
Striae in 10 µm
14-16 in the center of raphe valve, 15-17 in the center of raphe valve, up to 20 at the ends
14-16 in the center of raphe valve, 15-17 in the center of raphe valve, up to 20 at the ends
Karayevia amoena
Length Range
5.9-13.0 µm
5.9-13.0 µm
Width Range
3.2-4.9 µm
3.2-4.9 µm
Striae in 10 µm
22-26 on raphevalve, 18-20 on rapheless valve
22-26 on raphevalve, 18-20 on rapheless valve
Karayevia nitidiformis
Length Range
13.0-14.7 µm
13.0-14.7 µm
Width Range
4.2-4.3 µm
4.2-4.3 µm
Striae in 10 µm
19 on raphe valve, 19-21 on rapheless valve
19 on raphe valve, 19-21 on rapheless valve