Wamba (spider)

Wamba is a genus of comb-footed spiders (Theridiidae). These small spiders are primarily found in the Americas, with some species also occurring in other parts of the world. Wamba spiders are characterized by their small size and their distinctive comb-like bristles (setae) on the tarsus of the fourth leg, which they use to pull silk over their prey.

Description

Spiders of the genus Wamba are typically small, often less than 3mm in body length. Their coloration can vary between species, but they are generally pale to brownish. As members of the Theridiidae family, they possess a globose abdomen and are capable of producing sticky silk to capture prey. The comb-like bristles on their fourth leg, the calamistrum, are a defining feature of the family and are used to cribellate silk from the spinnerets.

Habitat and Distribution

Wamba spiders are found in a variety of habitats, including forests, grasslands, and urban environments. They often build small, irregular webs in sheltered locations such as under rocks, logs, or foliage. Their distribution is widespread, with numerous species found throughout North and South America. Some species have also been introduced to other regions.

Behavior

Wamba spiders are primarily nocturnal and are ambush predators. They construct small, tangled webs and wait for insects or other small invertebrates to become ensnared. Once prey is captured, the spider uses its comb-footed legs to wrap the prey in sticky silk before delivering a venomous bite.

Taxonomy

The genus Wamba belongs to the family Theridiidae, commonly known as comb-footed spiders or cobweb spiders. The taxonomy within the genus can be complex and subject to change as new species are discovered and existing classifications are refined through phylogenetic analysis.