- Phylum Platyhelminthes21
- Phylum Cnidaria15
- Kingdoms of Life10
- Phylum Kinorhyncha6
- Class Oligochaete5
- Life and Single Plasma Membrane10
- Symbiotic Life Styles of Protozoa6
- Class Chilopoda6
- Subphylum Chelicerata: Class Pycnogonida3
- Class Amphibians: Order Anura13
- Mammalian Orders9
- Class Aves: General Characteristics13
- Phylum Mollusca: Class Cephalopoda11
- Class Hexapoda20
- Phylum Mollusca: Class Scaphopoda5
- Phylum Hemichordata6
- Phylum Rotifera11
- Class Reptilia: Order Rhynchocephalia5
- Phylum Mollusca: Class Gastropoda15
- Classification of Organisms3
- Subphylum Crustacea: Class Malacostraca25
- Molluscan Characteristics7
- Phylum Echinodermata: Class Echinoidea5
- Avian Orders6
- Phylum Mollusca: Class Aplacophora2
- Subphylum Trilobitomorpha4
- General Characteristics of Echinoderms12
- Phylum Nematomorpha4
- Class Osteichthyes: Subclass Sarcopterygii and Actinopterygii6
- Subphylum Urochordata4
- Class Reptilia: Order Testudines6
- Phylum Echinodermata: Class Asteroidea13
- Subphylum Chelicerata7
- Phylum Mollusca: Class Caudofoveata3
- Superclass Agnatha5
- Phylum Gastrotricha5
- Subphylum Chelicerata: Class Arachnida13
- General Characteristics of Aschelminths4
- Classification of Protozoa24
- Phylum Echinodermata: Class Crinoidea3
- Class Reptilia: Order Crocodilia4
- Phylum Arthropoda: Subphylum Crustacea4
- Class Pauropoda and Symphyla6
- Phylum Echinodermata: Class Concentricycloidea6
- Phylum Arthropoda14
- Class Hirudinea4
- Patterns of Organization13
- Phylum Echinodermata: Class Ophiuroidea8
- Subphylum Chelicerata: Class Merostomata8
- Class Mammalia: General Characteristics10
- Phylum Nematoda6
- Phylum Echinodermata: Class Holothuroidea3
- Class Diplopoda5
- Phylum Annelida5
- Class Chondrichthyes, Elasmobranchii and Holocephali4
- Class Amphibians: Order Caudata8
- Phylum Mollusca: Class Bivalvia6
- Phylum Loricifera2
- Class Polychaeta4
- Subphylum Cephalochordate7
- Phylum Chordata4
- Phylum Mollusca: Class Polyplacophora6
- Class Myxini and Cephalaspidomorphi5
- Phylum Nemertea4
- Phylum Bryozoa: Moss Animals5
- Phylum Phoronida: Phoronids4
- Class Reptilia: Order Squamata6
- Superclass Gnathostomata2
- Subphylum Crustacea: Class Copepoda3
- Class Amphibians: Order Gymnophiona4
- Class Pterobranchia3
- Phylum Priapulida3
- Phylum Acanthocephala4
- Phylum Porifera5
- Phylum Mollusca: Class Monoplacophora2
- Ancient Birds and Evolution of Flight2