SEXING THROUGH THE STUDY OF THE EXUVIA
The spermatheca in circle. The four white spots are the area which the booklungs are placed.
Close up of a spermatheca
A) Spermatheca.
B) Uterus externus (’upper lip’).
C) Lower lip.
Fused spermatheca. Brachypelma got a fused spermatheca.
Paired spermatheca. For example Lasiodora got a paired spermatheca.
Male – Brachypelma vagans. These two glands that some species have can be mistaken for spermatheca.
Look for a uterus externus (’upper lip’) and lower lip. Males lack these.
Male – Haplopelma minax.
Spermatheca in circle. Aphonopelma seemanni