[Leander – University of British Columbia] BIOLOGY 205: PARTIAL CLASSIFICATION OF INVERTEBRATES You are responsible for knowing the following taxa in bold font (Ranks are arbitrary & listed for pedagogical purposes) ------Domain Eukaryota 1. Subdomain Excavata (Giardia, trichomonads, trypanosomatids, euglenids etc.) 2. Subdomain Rhizaria (forams, radiolarians, cercomonads, chlorarchniophytes etc.) 3. Subdomain Chromalveolata (brown algae, diatoms, ciliates, dinoflagellates etc.) 4. Subdomain Plantae (red algae, green algae, land plants etc.) 5. Subdomain Opisthokonta (animals, fungi, slime molds etc.) Superkingdom Amoebozoa (dictyostelids, myxomycetes, lobose amoebae etc.) Superkingdom Fungi (chytrids, mushrooms, yeasts etc.) Superkingdom Choanozoa Kingdom Choanoflagellata (choanoflagellates) ‘invertebrates’ ------⇓ Kingdom Animalia (= Metazoa) Phylum Porifera (sponges) Class Calcarea (calcareous sponges) Class Hexactinellida (glass sponges) Class Demospongiae (demosponges) Phylum Placozoa (Trichoplax) Eumetazoa ------⇓ Phylum Cnidaria (cnidarians) Class Hydrozoa (hydroids & hydromedusae) Class Anthozoa (anemones, corals & sea pens) Class Scyphozoa (‘true’ sea jellies) Phylum Myxozoa Phylum Ctenophora (comb jellies) Bilateria ------⇓ Phylum Platyhelminthes (flatworms) Class Turbellaria (free-living flatworms) Order Acoela (acoels) Order Tricladida (triclads) Order Polycladida (polyclads) Class Monogenea (monogenetic flukes) Class Trematoda (digenetic flukes) Class Cestoda (tape worms) Phylum Nemertea (ribbon worms) Phylum Annelida (annelids) Class Polychaeta (sand worms, tubeworms etc.) Class Clitellata Subclass Oligochaeta (earthworms) Subclass Hirudinoidea (leeches) Phylum Sipuncula (peanut worms) ------Lophophorates Phylum Phoronida (phoronids) Phylum Brachiopoda (brachiopods) ------Blastocoelomates Phylum Rotifera (rotifers) Phylum Nemata = Nematoda (roundworms) ------Know the composition of: ‘Protostomes’, ‘Lophotrochozoa’ & ‘Ecdysozoa’

1 [Leander – University of British Columbia] Phylum Mollusca (molluscs) Class Monoplacophora (monoplacophorans) Class Polyplacophora (chitons) Class Gastropoda (gastropods) Subclass Prosobranchia (snails) Subclass Opisthobranchia (sea slugs) Subclass Pulmonata (land snails & slugs) Class Bivalvia (bivalves or pelecypods) Subclass Lamellibranchia (clams, oysters etc.) Class Scaphopoda (tusk shells) Class Cephalopoda (cephalopods) Subclass Nautoloidea (nautilus) Subclass Coleoidea Order Sepioida (cuttlefish) Order Teuthoida (squids) Order Octopoda (octopuses) Phylum Onychophora (velvet worms) Phylum Arthropoda (arthropods) Subphylum Trilobitomorpha (trilobites – all extinct) Subphylum Crustacea (crustaceans) Class Branchiopoda (fairy shrimp, water fleas, Daphnia & Triops) Class Malacostraca Order Decapoda Infraorder Brachyura (true crabs) Infraorder Anomura (hermit crabs etc.) Infraorder Astacidea (lobsters etc.) Order Isopoda (pill bugs, rock lice etc.) Order Amphipoda (sand fleas, whale lice etc.) Class Maxillopoda Subclass Cirripedia (barnacles) Subclass Copepoda (copepods) Subclass Ostracoda (ostracods) Subphylum Cheliceriformes Class Pycnogonida (sea spiders) Class Chelicerata Subclass Merostomata (horseshoe crabs & eurypterids) Subclass Arachnida (spiders, mites & scorpions) Subphylum Hexapoda (previously, hexapods + myriapods = ‘Uniramia’) Class Insecta (insects; Additional taxa will be addressed in lab) Subphylum Myriapoda (centipedes & millipedes) Deuterostomes ------⇓ Phylum Hemichordata (acorn worms) Phylum Chordata (chordates) Subphylum Urochordata (tunicates: sea squirts & salps) Subphylum Vertebrata (vertebrates) Subphylum Cephalochordata (lancelets) Phylum Echinodermata Class Crinoidea (sea lilies & feather stars) Class Asteriodea (sea stars) Class Ophiuroidea (brittle stars & basket stars) Class Echinoidea (sea urchins & sand dollars) Class Holothuroidea (sea cucumbers)

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