Anthozoa : Sea anemones and stony corals; polyp stage only. Corals secrete calcium carbonate skeletons and rely on symbiotic algae (). Module 3: Spiralian Invertebrates (Protostomia)
Introduction to Invertebrate Zoology | PDF | Phylogenetic Tree - Scribd invertebrate zoology lecture notes ppt new
: Coordinated waves of circular and longitudinal muscle contractions ( peristalsis ), aided by stiff, hair-like bristles called setae (or chaetae). Anthozoa : Sea anemones and stony corals; polyp stage only
. Cover the incredible diversity of Mollusca, including gastropods (snails), bivalves (clams), and cephalopods (squid, octopus). Spend significant time on Arthropoda, the most successful animal phylum, highlighting their key innovation: the jointed exoskeleton. The largest animal phylum, characterized by a hard
The largest animal phylum, characterized by a hard exoskeleton and jointed appendages.
: The " Animal Diversity (Non-Chordates) " textbook (2025) provides a "systematic and updated study" with "clear illustrations" and "modern classification schemes," making it a practical choice for foundational courses.
: Blastocoelomate body cavity kept under high hydrostatic pressure. They lack circular muscles entirely, meaning they can only move with a distinctive, whip-like thrashing motion driven by longitudinal muscles.