Arthropods II

Phylum, subphylum, class, order

Sur cette roue (40 options)

  • Second maxillae forms a labium
  • Shell composed of the rostrum, carina, scuta, and terga
  • Parasitic inhabits nasal cavity of vertebrates very host specific
  • Thorax with 6 segments, abdomen with 5 segments
  • Most species with single eye similar to those seen in naupliis
  • Mostly aquatic, a few terrestrial species in moist habitats
  • Freshwater, marine, and a few terrestrial species
  • The whole organism is enclosed in a bivalve carapace
  • Some species undergo cyclomorphosis seasonal changes in morphology in response to changes in size specific predators
  • Presence of uropods flattened appendage on the sixth segment on the abdomen
  • The first pereopod (walking legs) may possess a claw
  • Development of a nauplius the larval form
  • Furrows running from the anterior to the posterior separates the body into three portion (2 lateral and 1 central)
  • Presence of 5 pairs of anterior appendages (2 pairs of which are antennae) - The first pair is referred to as antennules
  • Modified body for attachment to substrate or host
  • Some secrets cyanide (secreted through repugnatorial glands)
  • Repugnatorial glands (glands which secretes sticky substance) present in some species
  • Presence of venom secreting maxillipeds
  • Mouthpart composed of labrum (upper) and maxillae In spiders, the prosoma and opisthosoma are separated by a pedicel
  • In ticks and miters, the prosoma and opisthosoma are mostly fused
  • Elongate body with segmented opisthosoma
  • Appendages in the opisthosoma modified for breathing (book lungs)
  • Considered as living fossils Consists of two segments: prosoma cephalothorax) and opisthosoma
  • No antennae and mandibles
  • dragonflies and damselflies
  • (hard wings) beetles
  • (membrane wings) bees, wasps and ants
  • Mantis
  • stick insects, leaf insects
  • roaches and termites
  • (straight wings) grasshoppers, crickets
  • Previously placed under their own phylum
  • Mostly aquatic, a few terrestrial species in moist habitats
  • The whole organism is enclosed in a bivalve carapace
  • Body is divided into cephalon, thorax and pleon
  • Detritus feeders
  • Mouthpart composed of labrum (upper) and maxillae
  • Segmentation not evident prominent prosoma but the opisthosoma is much reduced
  • Really long legs attached to very small body, Digestive and reproductive system sometimes extend to the legs
  • In ticks and miters, the prosoma and opisthosoma are mostly fused