Ancylometes bogotensis

A. bogotensis shows considerable sexual dimorphism in size, with females being notably larger than males. Males have a total length of approximately 21 mm, while females reach about 26 mm.^[2]

In males, the prosoma is brown with distinctive broad lateral white bands, and the eye region is surrounded by white hairs. The chelicerae also have white hairs near their base. The abdomen and legs are yellowish brown. The male's reproductive structure (pedipalp) has characteristic features including an embolus with a small knob pointing toward a membranous lobe, and a distinctive hammer-like median apophysis.^[2]

Females have a uniform light brown coloration across the entire body, with femora showing patchy brown markings. The female reproductive opening (epigyne) features a narrow triangular median plate with a characteristic central, narrow but prominent protuberance.^[2]

Living specimens show some variation in coloration. Female prosomas are dark reddish brown with generally light brown abdomens. The clypeus and chelicerae are covered by white hairs, and the distal parts of the legs appear whitish due to hair coverage, while the femora are spotted with white hairs. Males are generally somewhat lighter brown, with the prosoma displaying broad lateral yellow bands.^[2]

A. bogotensis is a semi-aquatic predator that has been observed hunting frogs and tadpoles. When disturbed, these spiders demonstrate remarkable aquatic adaptations by hiding underwater for extended periods.^[2] The courtship, mating behavior, and life cycle have been studied in laboratory populations. Females produce large egg sacs containing 300-400 eggs, though some egg sacs may contain up to 600 eggs. However, parasitism of eggs is common, with studies showing up to 200 eggs in a single sac being parasitized.^[2]