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Tuesday, 16 November 2021

16-11-2021 MONTE CORONA, VALENCIA - CRAB SPIDER (Genus Bassaniodes)


AI Mode conversation: Genus BassaniodesGenus BassaniodesBassaniodes is a genus of crab spiders belonging to the family Thomisidae. First described by British zoologist Reginald Innes Pocock in 1903, these spiders are characterized by their distinct crab-like appearance, wide movements, and unique hunting adaptations.

Scientific Classification

Kingdom: Animalia (Animals)

Phylum: Arthropoda (Arthropods)

Class: Arachnida (Arachnids)

Order: Araneae (Spiders)

Family: Thomisidae (Crab spiders)

Genus: Bassaniodes (Pocock, 1903)

Physical CharacteristicsMembers of the Bassaniodes genus typically exhibit physical traits specialized for ground-dwelling and camouflage:

Appearance: They generally feature dull, textured bodies with combinations of dark brown, black, grey, or dark red-brown tones. Many species have mottled light or yellow spots that allow them to blend into soil, sand, and stones.

Legs: The first two pairs of legs are robust, distinctly long, and heavily armed with frontal spines, optimized for grabbing passing prey.

Sexual Dimorphism: Females are considerably larger than males. For example, a female Bassaniodes bufo can reach 10–12 mm in length, whereas the male usually measures only 4–5 mm.

Habitat & BehaviorUnlike well-known crab spiders that camouflage on colorful flowers, Bassaniodes species are primarily ground-dwellers.

Microhabitat: They are frequently discovered hiding beneath rocks, among stony debris, in leaf litter, or crawling over sand and short grass.

Hunting Strategy: They are ambush predators that do not build webs to catch food. Instead, they sit completely still and rely on their cryptic coloration to remain invisible until a target walks within striking distance.

Distribution & Notable SpeciesThe genus comprises around 39 recognized species widely spread across the Palearctic realm, Europe, North Africa, the Middle East, and parts of Asia.