40 David L. Penrose, David R. Lenat, K. W. Eagleson 



Table 7. List of organisms recorded from the French Broad River and tributar- 

 ies, showing relative abundance in each major area and months of 

 maximum abundance. S = streams, UR = upper river-montane, UL = 

 upper river lowland. R = Rare; present in 1-5% of samples. C = Com- 

 mon; present in 6-25% of samples. A = Abundant; present in at least 

 26% of samples. + = identification to species only during last collection. 



Frequency Month(s) of max- 



imum abundance 

 Taxon S UR LR 



EPHEMEROPTERA 











Is onychia spp. 



R 



A 



A 



J,Ju-0 



Baetis spp. 1 



A 



A 



A 



J, J-O 



B. amplus 



+ 



+ 



+ 



- 



B. nr. inter calaris 



+ 



+ 



+ 



- 



B. tricaudatus 



+ 



+ 



+ 



- 



Gen. nr. Centroptilum 



- 



- 



+ 



- 



Centroptilum sp. 



- 



- 



R 



- 



Pseudocloeon spp. 



A 



A 



A 



Ap, Ju, S-O 



Cinygmula subaequalis 



A 



C 



C 



Mr-Ap 



Epeorus {Iron) spp. 



A 



A 



A 



Mr-Ap 



E. (I.) sp. 2 2 



A 



A 



C 



J-Mr 



Rhithrogenia sp. 



C 



A 



A 



J, Mr-Ap 



Stenacron pallidum 1 Carolina 



C 



C 



C 



J 



S. interpunctatum 



R 



C 



- 



- 



Stenonema carlsoni 



C 



R 



- 



J-Ju 



S. ithaca 



A 



A 



A 



D-F 



S. modestum 3 



A 



A 



C 



j,s-o 



S. pudicum 



C 



C 



C 



- 



S. terminatum{?) 



C 



R 



- 



- 



Habrophlebia vibrans 



R 



- 



- 



- 



Paraleptophlebia sp. 



C 



A 



R 



Ju-A 



Ephemerella (Attenella) 











attenuata 4 



- 



C 



R 



Ju 



E. (Drunella) tuberculata 



R 



- 



- 



- 



E. (D.) cones tee 



C 



R 



- 



Ju 



E. (D.) cornutella 



C 



R 



- 



Ap 



E(D.) lata 



R 



C 



C 



Ap-Ju 



E. (D.) longicornis 



C 



- 



R 



Ju 



E. (D.) walkeri 



R 



R 



R 



Ap 



E. (D.) way ah 



C 



- 



R 



Ju-S 



E. (Dane I la) lit a 



R 



- 



- 



- 



E. (D.) simplex 



R 



R 



R 



Ju 



E. (Ephemerella) berneri 



- 



R 



R 



■ 



Originally identified to genus level, species later identified from selected sam- 

 ples using Morihara and McCafferty (1979). 



Epeorus sp. 2 was distinguished by difference in coloration and the presence of 

 spatulate claws. 



Early instars of other species may have been lumped with S. modestum. 

 Some taxonomists now consider previous Ephemerella subgenera to have 

 generic status. 



