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BSC 201L (14e, rev.)
Lab #7: Small Ecdysozoa, Chelicerate Arthropods AND Arthropoda
Additional Ecdysozoan Specimens (in the Panarthropoda)
NOT IN LAB MANUAL
Things to know for these specimens:
Be able to identify all characteristic appendages for each group.
Fresh water, marine water , o r t er restrial?
Structures and their functions
Phylum Onychophora
– moist T
– so ft flexible cuticle w/ chitin
– gr owth by molting (no exuvia)
– unsegmented body w/
– paired unjointed appendages w/ claws
– 1 pr. antennae
– 1 pr. mandibles and 1 pr. oral papillae
1. Preserved specimen
– LABELS: antennae, mouth, oral papillae
Phylum Tardigrada
– MW, FW, moist T
– thin flexible nonchitinous cuticle
– gr owth by molting
– unsegmented body
– 4 prs. unjointed appendages each w/ 4-8 claws
2. Slide (or living specimen)
Use the text and figures in Exercise 13 (The Chelicerate Arthropods) and Exercise 15 (The
Arthropods) to aid your study of the prepared slides and preserved specimens; examine the
additional specimens as indicated.
Things to know for Phylum Arthropoda:
Be able to identify all tagmata and all characteristic appendages for each group.
Be able to distinguish males from females.
Fresh water, marine water , o r t er restrial?
Structures and their functions
