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Unformatted text preview: BSC 2010L – INVERTEBRATES II INVERTEBRATES Principal Biological Concepts to Emphasize: Emphasize: A. Protostome vs. deuterostome. A. Protostome B. Extremely diverse groups. B. Extremely C. Terrestrial adaptations of Arthropods. C. Terrestrial D. Serial homology. D. Serial E. Evolution of flight. E. Evolution F. Metamorphosis. F. Metamorphosis. G. Detailed anatomy of the earthworm. G. Detailed H. Detailed anatomy of the crayfish. H. Detailed Protostome vs. deuterostome. Protostome A. Mollusks and arthropods, as well as the A. Annelids we looked at last week, are protostomes. protostomes. 1. Spiral and determinate cleavage 1. Spiral 2. Blastopore (opening of the archenteron) becomes 2. the mouth the 3. Schizocoelous formation of the coelom 3. Schizocoelous B. We will look at deuterostome phyla in BSC B. 2011L (Echinodermata and Chordata) 2011L 1. Radial and indeterminate cleavage 1. Radial 2. Blastopore forms anus 2. Blastopore 3. Enterocoelous formation of coelom 3. Enterocoelous Early embryonic development Early Early development in protostomes and deuterostomes Early Phylum MOLLUSCA Phylum 1. Gastropoda 1. Gastropoda 2. Bivalvia 2. Bivalvia 3. Cephalopoda 3. Cephalopoda Basic body plan of mollusks Basic Mussel heart xsec Mussel prepared (no. 1) Garden snail Garden The results of torsion in a gastropod The Gastropods: Nudibranchs (top left and bottom left), terrestrial snail (bottom left), deer cowrie (bottom right) Gastropods: A bivalve: Scallop bivalve: Anatomy of a clam Anatomy Cephalopods: Squid (top left and bottom left), nautilus (top right), octopus (bottom right) Cephalopods: Phylum ARTHROPODA Phylum 1. Subphylum Chelicerata 1. Subphylum a. class Merostomata - horseshoe crabs a. class b. class Arachnida - spiders, ticks, scorpions b. class 2. Subphylum Crustacea 2. Subphylum a. class Crustacea - aquatic arthropods - shrimp, a. lobsters, crabs, crayfish lobsters, 3. Subphylum Uniramia 3. Subphylum a. class Insecta - flight a. class b. class Chilopoda - centipedes b. class c. class Diplopoda - millipedes c. class Lycosid spider Lycosid Arachnids. Scorpion (left), parasitic mites inhabiting tracheae of honeybee (right) Arachnids. Horseshoe crabs, Limulus polyphemus Limulus External anatomy of an arthropod External Insecta: beetle Insecta: Insect flight, dragonfly Insect Metamorphosis of a butterfly Metamorphosis Class Dipolopoda (millipedes) Class Insect Malpighian tubules Insect prepared (no. 11-2) Malpighian tubules of insects Malpighian Insect tracheae Insect prepared (no. 11-3) discuss diversity of Arthropod respiration. Spider anatomy Spider Anatomy of a grasshopper, an insect Anatomy Earthworm Dissection Earthworm A. Study external anatomy first. A. Study B. Anesthetize in ETOH. B. Anesthetize C. Pin to one side of dissecting tray, C. dorsal side up. dorsal D. Study internal anatomy. D. Study 1.Small reproductive structures Small ovaries, testes, vas deferens, oviduct, sperm funnels - do not need to be found in the worms. Locate these only on the models know their functions. know E. Dispose of in trash. E. Dispose External anatomy of an earthworm External Anatomy of an earthworm Anatomy Metanephridia of an earthworm Metanephridia Crayfish dissection Crayfish A. WORK IN PAIRS. A. IN B. Dispose of crayfish in buckets. B. Dispose Insect identification - slides and dichotomous key. A. A. B. B. You must identify five (5) insect orders You Hand this in before leaving lab (5 pts.) Hand 1. 1. 2. 3. Name Slide box number Slide number, insect order for each of 5 slides. C. D. E. Key to insect orders Do not share the slide boxes. For lab practical – you don't need to know orders For or the structures used in the key. or cerci elytra A F B setae G cornicles H C D haltere I furcula E Invertebrates II Scavenger Hunt 1. Complete the Inverts II scavenger hunt data sheet (5 pts.) 2. Find answers on the display cards associated with the display specimens. 3. Do this work by yourself. 4. Turn this in before you leave lab. BioViewer BioViewer A. B. C. A. Link in right column of lab homepage. Password is anatomy. You can use this to study lab materials and to You review for the midterm lab practical. review Several categories are listed: A. B. C. D. E. F. Classification of organisms Microscope slides Lab models Image search Glossary Lab anatomy ...
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