Order Pseudoscorpiones

• House Pseudoscorpion

  A) setae

  B) eyes

  C) pedipalp

  D) carapace

  E) femur

  F) tibia

  G) tarsus

  H) claw

  I) tergite

  
• House pseudoscorpion (ventral view)

  A) Pedipalp

  B) finger

  C) Chelicerae

  D) hand

  E) tibia

  F) femur

  G) maxilla

  H) coxa

  I) Trochanter

  J) spiracles

  K) sternite

  L) anus

  
• Phylum: Arthropoda

  Subphylum: Chelicerata

  Class: Arachnida

  Order: Pseudoscorpiones

  Family: Cheliferidae

  Genus: Chelifer

  Species name: Chelifer cancroides

  Common name: House pseudoscorpion

  
• Lack the long abdomen and sting - pedipalp with poison glands
• Feeds on small arthropods
• Has one or two eyes at each anterior lateral corner (some species don't)
• Gas exchange

  Tracheal system opening via two pairs of spiracles on ventral side of third and fourth abdominal segments
• Excretory

  coxal galnds
• Sense organs

  indirect eyes, tactile hair, trichobothria, and lyriform organs