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Kingdom Animalia

Invertebrate Animals -Part

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Minor Lophotrochs

P: Acanthocephalans =spiny-headed worms

P: Cycliophora

female

male

Norwegian lobster

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P: Nemertea = ribbon worms

P: Nematoda = round worms Caenorhabditis elegans =

C. elegans

Trichinella

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hookworm

Dracunculus = guinea worm Filarial worms

P: Arthropoda

Cl: trilobites (all extinct)

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Cl: Chelicerata

horseshoe crabs

Blue blood

Arachnids

Cl: Myriapoda

C: Chilopoda = centipedes

C: Diplopoda = millipedes

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Cl: Pancrustaceans

Crustaceans

biramous appendages

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Cl: Pancrustaceans

Insects

more insects

Complete metamorphosis

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P: Loricifera

P: Priapulida P: Tardigrada = water bears

P: Onychophora = velvet worms

P: Echinodermata = echinoderms

Asteroidea: sea stars & sea daisies

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endoskeleton of Ca-containing plates

Asteroidea: Sea daisies

C: Crinoidea = feather stars, sea lillies

C: Asteroidea = starfish

C: Ophiuroidea = brittle and basket stars

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C: Echinoidea = sea urchins, sand dollars

C: Holothuroidea = sea cucumbers

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P: Hemichordata = acorn worms (& pterobranchs)

On to the Phylum Chordata next time (with our subphylum: Vertebrata)