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Arthropoda

BIOL2204 Arthropoda

QuestionAnswer
Key body structures segmented body, paired jointed appendages, external cuticle/exoskeleton that is moulted
Subphylum Crustacea Appendages antennules, antennae, mandibles, maxillae, pereiopods (walking legs), pleopods (swimming legs), uropods + telson = tail
label a prawn diagram good job!
Crab key structure carapace (shell), chela (pincer), chelipeas (attached to pincer)
cephalothorax head and thorax, crab is dorso-ventrally flattened
Nauplius (crustacea) developmental larval form (antennules, antennae, mandibles), median eye
Zoea (crustacea) decapods carrying developing eggs beneath abdomen and release a zoea (slender, curved abdomen and spines)
Manca (crustacea) juvenile-like isopod syage, brooded in a ventral brood pouch (direct development)
Megalopa (crustacea) true crabs, look like weird little crabs
Subphylum Chelicerata athropods that lack antennae but have chelicerae as the first pair of appendages (sea spiders and horseshoe crabs)
C. Pycnogonida sea spiders (label diagram), jointed appendages and chitinous exoskeleton
C. Merostomata horseshoe crabs (label diagram), chelicerae, carapace, book gills, compound + simple eyes etc
Created by: mishm
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