added on: 4/24/2017 5:33:00 PM, added by: pboylan
modified on: 4/24/2017 5:33:00 PM, modified by: pboylan
1 QUALIFIER:
Qualifier Code: TaxaNote Description: Notes taken about the taxa for a count; older data typically includes information such as beginning and end scan coordinates, unusual taxa, etc. Comments: Sparse sample. Counted on four transects:
Transect 1: start x=90.0, y=17.0; end x=90.0, y=9.0 200 valves
Transect 2: start x=92.0, y=15.0; end x=92.0, y=8.0 337 valves
Transect 3: start x=94.0, y=16.0; end x=94.0, y=9.0 555 valves
Transect 4: start x=96.0, y=16.0; end x=96.0, y=13.0 600 valves
Observations on individual taxa:
- In the counts I kept separated the morphotype corresponding to Navicula minima Grunow in Vaan Heurck (Figs 128-142 in Wetzel et al. 2015) from "typical" Sellaphora saugerresii (e.g., Figs 112-127 in Wetzel et al. 2015). In this count:
Sellaphora saugerresii "typical" = 64 valves
Morphotype Navicula minima = 13
- In the counts I kept separated dwarf forms of Achnanthidium exiguum var. constrictum. These differ by small size, subrostrate ends, and extremely weak constriction, and might represent a separate taxon. In this count:
Achnanthidium exiguum var. constrictum = 23 valves
Achnanthidium exiguum var. constrictum DWARF = 3
- In the counts I kept separated typical specimens of Nitzschia palea from a short, subcapitate morphotype. In this count:
Nitzschia palea SHORT SUBCAPITATE = 7 valves
Nitzschia palea = 0
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