Spider
Videos
Spiders are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank sev
Araneus diadematus
Palystes castaneus female, dorsal aspect pedipalp trichobothria carapace of prosoma (cephalothorax) opisthosoma (abdomen) eyes AL (anterior lateral) AM (anterior median) PL (posterior lateral) PM (posterior median) Leg segments: coxa trochanter femur patella tibia metatarsus tarsus claw chelicera
Palystes castaneus female, ventral aspect. Nos 1 to 14 as for dorsal aspect. sternum of prosoma pedicel (also called pedicle) book lung sac book lung stigma epigastric fold epigyne anterior spinneret posterior spinneret Legs are labelled I, II, III, IV from anterior to posterior.
A syrphid fly captured in the web of a spider
Mesothelae
Videos
The Mesothelae are a suborder of spiders. The division of extant members of the suborder into families has varied. A single extant family Liphistiidae may be accepted, with two subfamilies: Liphistiin
Spider
…heart and respiratory organs, organs atypical of an abdomen. Unlike insects, spiders do not have antennae. In all except the most primitive group, the Mesothelae, spiders have the most centralized nervous systems of all arthropods, as all their ganglia are fused into one mass in the cephalothorax. Unlike most…
Heptathela higoensis
Liphistius malayanus, a member of the Liphistiinae
Heptathela kimurai, a member of the Heptathelinae
Qiongthela bawang, a member of the Heptathelinae