These Tetragoneuria/Epitheca Baskettails were photographed in
my yard on Lake Worth, near Fort Worth, Tarrant County, Texas:;
they should be either Mantled semiaquea
or Common cynosura;
To my eye there are differences in the abdomen shape and the structure
of the cerci, so I suspect that A) is semiaquea and B)
is cynosura - I'd appreciate feedback on this thorny ID
issue:
A) late March 2004:
B) early May, 2004:
Here's a comparison of the cerci:- there seem to be three segments
to the cerci; B has the distal segments longer than on A; on B
the first segments narrow slightly while the 2nd segments widen
slightly - on A the first two segments seem to be almost parallel:
