Tribe Thomisini

Thomisini is a tribe within the subfamily Thomisinae (Family Thomisidae, Order Araneae), comprising many of the typical flower- and vegetation-dwelling crab spiders. The tribe has a broad worldwide distribution and is especially diverse in tropical and subtropical regions, though numerous species also occur in temperate habitats.

Members of Thomisini exhibit the characteristic crab-like morphology of Thomisinae. The body is usually flattened and robust, with the first two pairs of legs greatly enlarged, laterigrade, and adapted for grasping prey. These front legs are often held outstretched while the spider waits in ambush. Females are generally larger and more heavily built than males, and sexual dimorphism in size and shape is common.

Thomisini spiders are primarily ambush predators and do not build prey-capture webs. Many species live on flowers, leaves, or stems, where they rely on camouflage and immobility to capture unsuspecting prey. Coloration is often cryptic, matching white, yellow, green, or brown substrates, and in some species individuals are capable of slow color change to better blend with their environment.

Prey mainly consists of insects and other small arthropods, including flies, butterflies, bees, and other pollinators. Despite their sedentary hunting strategy, Thomisini spiders are effective predators and can subdue prey that is relatively large compared to their own body size using strong forelegs and venom. Silk is used chiefly for safety draglines, egg sacs, and temporary retreats.

Reproduction follows the typical entelegyne spider pattern, with complex genital structures used in mating and species recognition. Development is direct, with juveniles resembling miniature adults.

Ecologically, Thomisini are important predators in plant-rich habitats such as meadows, gardens, forests, and agricultural landscapes. By influencing insect populations, including pollinators and herbivores, they play a significant role in shaping local ecological interactions and maintaining ecosystem balance.