I have an 5cm (1st photo) and 8cm (2nd photo) Kleinmanni. I think the bigger one (2nd photo) is male, smaller (1st photo) is female. Any guesses? Thanks!
Second one is definitely male. I think the first one is still too young to tell. They all look female as babies and juveniles.
May I request more pics? This is a species I've long been interested in and I'm getting a bunch of babies later this spring. The more I learn the better.