A male Gynacantha basiguttata is generally recognized by its swollen spherical base to the abdomen with a pair of rounded ear-like auricles on segment 2 followed by an extremely thin narrow segment 3. At the end of abdomen is a pair of long thin superior appendages.

A male Gynacantha basiguttata’s accessory organ underside of second abdominal segment.

Notice the pair of sharp hooks with dark tip (A)
And the pair of rounded ear-like auricles (B)

The pair of superior appendage is expanded into a distinct spoon shape with a concentrated tuft of hairs at its tip.

The inferior appendage is less than half the length of the superiors.