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Biology 03050, Invertebrate Zoology


Lab Manual: Hickman et al., 9th ed., Exercises 14 and 15, pp. 207-225


WORD BANK (terms that you are responsible for):

  1. antenna
  • antennule
  • anus
  • bilateral symmetry
  • biramous appendage
  • book gill
  • carapace
  • cephalization
  • chelicera
  • cheliped
  • chitin
  • Class Arachnida (spiders, scorpions, ticks)
  • Class Malacostraca (lobsters, crayfish, crabs)
  • Class Merostomata (horseshoe crabs)
  • compound eye
  • copulatory swimmeret
  • digestive gland
  • dorsal abdominal artery
  • esophagus
  • exoskeleton
  • extensor abdominal muscles
  • flexor abdominal muscles
  • gastric mill (teeth)
  • genital operculum
  • gill
  • gill chamber
  • gonad
  • heart
  • intestine
  • jointed appendages
  • lung slit
  • mandibular muscle
  • mandible
  • maxilla, -ae
  • maxilliped
  • metamerism
  • mouth
  • nerve cord (ventral)
  • ostium, -a
  • oviduct
  • palp
  • pedipalp
  • pericardium
  • rostrum
  • seminal receptacle
  • serial homology
  • simple eye
  • spinneret
  • sternum
  • stomach
  • Subphylum Chelicerata (chelicerates)
  • Subphylum Crustacea (crustaceans)
  • swimmeret (pleopod)
  • tagmata
  • telson
  • tracheal spiracle
  • uniramous appendage
  • uropod
  • vas deferens opening
  • walking leg (pereiopod)

    Using your lab manual, perform those parts of Exercises 14 and 15 listed below:

    14: Read over the introduction to the phylum, pp. 207-208.

    14A: Examine external features of the horseshoe crab and spider, highlighting the terms listed above. Be prepared to identify scorpions and ticks as arachnids as well, given their external features.

    15A: Read the introduction to the crayfish. We will use glass dishes to hold the live crayfish for examination. How do the appendages move? Using a preserved specimen of crayfish, first examine external features. Following the directions of pp. 217-218, dissect the appendages to demonstrate serial homology. Make sure to see the gills under the dissecting scope to note their microscopic features. Dissect the internal structures of the crayfish, highlighting the terms listed above. Finally, be prepared to identify crabs, barnacles, shrimps, and other classes as crustaceans, given their external features.

    Your instructor may assign you additional questions from the lab manual as homework and/or as quiz questions.

    Your notes and drawings below and on back:


    |main page| |background| |03028: Physiology| |03048: Anatomy|

    |03050: Invertebrate Zoology| |03051: Vertebrate Zoology| |03074: Economic Botany|


    Please send comments and questions to: cronewil@hvcc.edu


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    This page updated October 25, 1999