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Diagram of the internal anatomy of a female two-lunged spider. Image by John Henry Comstock; Conversion by Ryan Wilson
Palystes castaneus female dorsal aspect 1: pedipalp 2: trichobothria 3: carapace of prosoma (cephalothorax) 4: opisthosoma (abdomen) 5: eyes AL (anterior lateral) AM (anterior median) PL (posterior lateral PM (posterior median) Leg segments: 6: costa 7: trochanter 8: patella 9: tibia 10: metatarsus 11: tarsus 13: claw 14: chelicera. Photo by JonRichfield
Palystes superciliosus female ventral aspect 1: pedipalp 2: trichobothria 3: carapace of prosoma not shown 4: opisthosoma (abdomen) 5: eyes not shown Leg segments: 6: coxa 7: trochanter 8: patella 9: tibia 10: metatarsus 11: tarsus 13: claw 14: chelicera 15: sternum of prosoma 16: pedicel (also called pedicle) 17: book lung sac 18: book lung stigma 19: epigastric fold 20: epigyne 21: anterior spinneret 22: posterior spinneret Photo by JonRichfield
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