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Hirudinea
- Class Hirudinea (Leeches) - Discusses habitat and value. With photos and references.
- Virginia Institute of Marine Science Leeches Hirudinea - Lists organisms and resources.
- Animal Diversity Web Subclass Hirudinea Leeches - Discusses unique features of the group. With photos.
- Sidwell Friends School Class-Hirudinea - Discusses unique features. Includes classification and photos.
- Gondar Design Science Leeches Hirudinea - Discusses classification, relationships, habitat and medical uses.
- Earth Life Hirudinea - Discusses medical uses. With photos.
- Phylum: Annelida / Class Clitellata / Sub-Class: Hirudinea - Provides illustrations.
- Soil and Water Conservation Society of Metro Halifax Class Hirudinea - Discusses characteristics of member species.
- Nature Serve Explorer Order in Class Hirudinea - Provides guide to subgroups.
- Taxonomicon: Class Hirudinea - Provides classification guide.
- Montana State University- Hirudinea - Discusses life cycle, economic importance, preservation and synopsis of neartic families.
- Marine Fauna Gallery of Norway-Leeches - Discusses physical characteristics. With photos.
- University of Alberta Hirudinea - Provides photos with description.
- Natural History Collection Navigation Bar Class Hirudinea - Discusses features and uses.
- Fact Monster Class Hirudinea - Discusses anatomy, predation, digestion and reproduction.
- Aqua World Hirudinea Leech - Discusses predation and treatments. With photos.
- Ukrainian Freshwater Leeches - Contains photos of representative species.
- University of Aberdeen Class Hirudinea Earthworms - Features educational materials. With photos.
- About the Leech - Discusses appearance, habitat and life cycle. With links.
- Biodidac ??? Hirudinea - Presents the reproductive system of the leech.
- Commonwealth of Kentucky Leeches Class Hirudinea - Discusses unique features. With illustrations.
- Notes on the Natural History of the Leeches on the George Reserve, Michigan [PDF] - Features a study by Roy T. Sawyer.
- Systematic Tree of Organisms: Hirudinea - Provides classification guide.
- Seasonal Changes in the Vertical Distribution of Hirudinea from Lake Ohrid - Presents a study by Sasho Trajanovski, et. al.
- Occurrence of Two Leech Species (Annelida: Hirudinea) on Fishes - Presents summary of the study by J. E. Flotemersch.
- Alien Travel Guide Class Hirudinea - Lists orders of Leeches.
- Presence of Invertebrate Dystrophin-Like Products in Obliquely Striated Muscle of the Leech - Discusses substances found within the leech.
- Simon Fraser University Class Hirudinea - Shows photos of member species.
- Some Common Species of Leeches (Hirudinea) [PDF] - Lists representatives.
- Canada???s Artic Leeches- Class Hirudinea - Discusses unique features of the group.
- UNC Asheville Leech [PDF] - Presents a labeled illustration.
- Marine Leech, Stibarobdella macrothela - Presents summary of the study by Soto JM.
- On the Origin of the Hirudinea and the Ddemise of the Oligochaeta. - Presents summary of the article by Martin P.
- Cave Leech (Hirudinea, Erpobdellidae) from Croatia - Features the study by Sket B, et. al.
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Oligochaeta
- Sidwell Friends University Class Oligochaeta - Discusses unique features. Includes classification guide and photos.
- Animal Diversity Web Subclass Oligochaeta (Angleworms, Earthworms, Earthworms and Their Relatives, N - Discusses features and classification. With photos.
- Soil and Water Conservation Society of Metro Halifax Class Oligochaeta - Discusses value. With references and photos.
- Access Science Oligochaeta - Discusses distinguishing features.
- Terrestrial Oligochaeta of Illinois - Discusses families and member species.
- Bio Research Oligochaeta - Provides access to related sites.
- Oligochaeta Molecular Phylogeny - Provides access to online discussions.
- AllBookstores.com Oligochaeta - Lists publications on the group.
- Illinois Natural History Survey Oligochaeta - Discusses unique features. With photos.
- Montana State University Oligochaeta - Discusses recognition, life cycle, importance, preservation and taxonomy.
- Biodidac - Oligochaeta - Shows illustrations of member species.
- Taxonomy of Fridericia (Oligochaeta, Enchytraeidae) - Information on the article by Rudiger M. Schmelz.
- Natural History Collection of the University of Edinburgh Class Oligochaeta - Discusses distinguishing features of member species.
- Systematic Tree of Organisms: Oligochaeta - Contains classification guide.
- Freshwater Oligochaeta of North-West Europe - Offers identification guide. In CD-ROM format.
- Native Earthworms (Oligochaeta) From Southern Australia [PDF] - Presents article by R. J. Blakemore.
- Oligochaeta (Annelida)Fauna of Aksu Stream (Antalya) [PDF] - Features article by Soner Capraz and Naime Arslan.
- Infoplease Class Oligochaeta - Contains discussion on anatomy, reproduction, circulation and respiration.
- University of Aberdeen Class Oligochaeta Earthworms - Presents distinguishing characteristics. With photos.
- Plymouth State University Class Oligochaeta - Discusses description and interesting facts.
- Cytogenetic and Population Effects in Oligochaeta - Presents summary of the article by Tsytsugina VG and Polikarpov GG.
- Distribution of Oligochaeta Species as Bioindicator - Features article by Nilgun Kazanci.
- Fauna of India and the Adjacent Countries : Aquatic Oligochaeta - Information on the publication by K. Vanamala Naidu.
- Westminster College Aquatic Earthworms Class Oligochaeta - Contains biological profile. With links to related sites.
- Auburn University Montgomery Oligochaeta - Contains images of internal anatomy.
- Fact Monster Class Oligochaeta - Provides data on anatomy, digestion, reproduction, circulation and respiration.
- BugWise Earthworms (Class Oligochaeta, Order Haplotaxida) - Discusses appearance and characteristics. With photos.
- Earthworms and Their Relatives Oligochaeta - Discusses appearance, habitat, feeding, predators, importance, reproduction and behavior.
- Title Toxicity of pesticides to earthworms Oligochaeta: - Presents study by Potter, Daniel A, et. al.
- Storming Media Oligochaeta - Presents list of publications on this class.
- Oligochaetes from the Bolivian Andes - Contains photos of representative species.
- Oligochaeta! Oh Really? - Earthworms Around the World - Discusses unique features of member species.
- Lucid Central Annelida: Oligochaeta - Discusses distinguishing features.
- Virtual Biology Labs Class Oligochaeta - Discusses features, external anatomy and locomotion. With photos.
- Factors Affecting the Distribution of Oligochaeta - Article by Dumnicka, Elzbieta and Galas, Joanna.
- Mikko's Phylogeny Archive Oligochaeta - Provides classification guide.
- Oligochaeta Anatomy - Lists references for books by Barrie Jamieson.
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Polychaeta
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Elopiformes
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Gasterosteiformes
- Animal Diversity Web Order Gasterosteiformes Pipefishes and Sticklebacks - Provides classification guide.
- What Are Stickleback Fish and Gasterosteiformes - Discusses the unique features of the group.
- Access Science Articles on: Gasterosteiformes - Provides guide to member species.
- Order Gasterosteiformes Contains These Families: - Contains guide to subgroups.
- Mikko's Phylogeny Archive Gasterosteiformes - Contains classification guide.
- Marine Fauna Gallery of Norway Sticklebacks - Discusses unique features of member species. With photos.
- Gasterosteiformes- Sticklebacks, Pipefish and Seahorses - Provides classification guide and characteristics. With photos.
- Marine Fishes of Singapore Gasterosteiformes - Contains guide to species identification.
- Illinois Natural History Survey Gasterosteiformes [PDF] - Provides access to photos of member species. With descriptions.
- Funet Network Gasterosteiformes - Contains guide to families.
- Taxonomicon: Order Gasterosteiformes - Presents classification guide.
- Peptidases of the Order Gasterosteiformes - Contains protein information on this group.
- Virtual Aquarium Three Stickleback, Gasterosteus aculeatus - Discusses unique features of these species. With photos.
- Sticklebacks Life History and Michigan History - Discusses species found in the state.
- Widewater Sticklebacks - Discusses the unique traits of this specie. With images.
- Gulf of Maine Research Institute Sticklebacks. Family Gasterosteidae - Lists guide to species identification.
- Assortative Mating Between Differentially Adapted Sticklebacks - Discusses species population in British Columbia.
- Brook Stickleback Culaea inconstans (Kirtland, 1841) - Contains lecture on habitat, size, food, predators, reproduction, and conservation.
- Boughman Lab Sticklebacks - Discusses sexual and natural selection in speciation of these species.
- Sticklebacks Reveal Secrets to Evolutionary Change in Stanford Study - Discusses the adaptations of the group.
- Big Cross Lands Sticklebacks in the Spotlight - Discusses evolution and breeding.
- Sticklebacks Can Smell the Mates Who Strengthen Their Immune System - Discusses sexual recognition in these species.
- Tooth Wear, Niche Differentiation and Stickleback Speciation - Discusses observation and experimental evidences.
- Foraging Nine-Spined Sticklebacks Prefer to Rely on Public Information Over Simpler Social Cues - Article by Isabelle Coolen, et. al.
- Nests as Ornaments: Revealing Construction by Male Sticklebacks - Article by Iain Barber, David Nairn and Felicity A. Huntingford.
- Female Sticklebacks Count Alleles in a Strategy of Sexual Selection - Reports on the study by Reusch TB, et. al.
- Function of Mate Choice in Sticklebacks: Optimizing Mhc Genetics - Presents article by Milinski, M.
- Evolving Fish Story - Discusses sticklebacks. With photos.
- Character Shift in the Defensive Armor of Sympatric Sticklebacks - Presents a study by Steven M. Vamosi and Dolph Schluter.
- Widespread Parallel Evolution in Sticklebacks - Presents abstract of the study by Colosimo PF, et. al.
- Field Observations of Courtship and Mating Between Limnetic and Benthic Sticklebacks - Summary of the study by Ridgeway and McPhail 1984.
- How did the Stickleback Lose Its Fins? - Discusses evolutionary development.
- Detour Experiments With Sticklebacks (Gasterosteus Aculeatus L.) - Presents absract of the study by E. S. Russell.
- Parallel Evolution of Sexual Isolation in Sticklebacks - Article by Janette Wenrick Boughman, et. al.
- Exploring Stickleback Behavior - Provides educational materials.
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Lampridiformes
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Salmoniformes
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Scorpaeniformes
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Siluriformes
- Tree of Life Siluriformes Catfishes - Discusses phylogenetic relationships. With photos.
- All Catfish Species Inventory - Contains images. With links to related sites.
- PlanetCatfish - Lists links to services and other information.
- Animal Diversity Web Order Siluriformes - Provides classification guide and images of member species.
- Access Science Siluriformes - Discusses unique features. With links to related sites.
- Angelfire.com Catfish - Discusses member species.
- Photo of Sillurus glanis - Shows images of this specie.
- Chromosomal Evolution in North American Catifishes (Siluriformes: Ictaluridae) - Features the article by Willaim Hunt LeGrande.
- Ultrastructure of Spermatozoa of the Slender Catfish Silurus microdorsalis - Presents a study of by Lee YH and Kim KH.
- Flathead Catfish - Shows images of this specie.
- Reproductive Biology of the Neotropical Armoured Catfish Hoplosternum littorale - Article by Gerard Hostache and Jan H. Mol.
- Biology and Culture of Channel Catfish - Provides information on this publication.
- Aquaculture Technology Siluriformes - Lists publications on these species.
- Striped Catfishes of the Genus Mystus Scopoli, 1777 (Siluriformes: Bagridae) - Discusses generic placements and the defining characters for each species.
- Marine Fishes Suliriformes - Lists member species.
- Catfishes, A Super-Group of Fishes - Discusses the unique traits of these species. With links to related sites.
- Application of CDA Analysis to the Catfishes of the Genus Hypostomus - Discusses characterization and identification of species.
- Etigazette.com Catfish - Discusses the distinguishing traits of these species.
- Catfish: Understanding These Scavengers - Discusses uique characteristics.
- Candir Vandellia cirrhosa (Valenciennes, 1846) - Provides photos of this specie.
- Aquatic Community Catfish - Contains discussion on the unique characteristics.
- Channel Catfish Life History and Biology - Discusses these commercially cultured species.
- Review of the Southeast Asian Catfish Genus Ceratoglanis - Features information on this publication.
- Biodiversity and Aquaculture of Catfishes in South East Asia - Discusses biological diversity, characterization and conservation.
- Catfish - Introduction - Discusses distribution, behavior, sexual differences, spawning and commercial importance.
- New Species of the Catfish Genus Trichomycterus [PDF] - Discusses systematics, unique features and phylogenetic relationships.
- Microsyndontis (Teleostei: Siluriformes: Mochokidae) of the Lower Guinea Region [PDF] - Reviews these species. By Heok Hee Ng.
- New Species of Otothyrini (Siluriformes: Loricariidae: Hypoptopomatinae) [PDF] - Discusses newly discovered members.
- Biolib: Gallery: Siluriformes - Shows images and scientific names of catfish.
- Description of a New Clariid Catfish, Clarias pseudonieuhofii [PDF] - Provides information on unique features of the walking catfish.
- Mexican Blindcats Genus Prietella (Siluriformes: Ictaluridae) [PDF] - Discusses range, habitat, laboratory diet, parasites, sensory biology, bahavior, reproduction and systematics.
- Clarias nigricans, New Species of Clariid Catfish [PDF] - Discusses this newfound member.
- Catfish of the Genus Auchenipterichthys - Presents the study by Carl J. Ferraris, et. al.
- Osteology and Myology of the Cephalic Region and Pectoral Girdle of Schilbe mystus - Features the findings of this study.
- Oldest Known Catfish (Teleostei: Siluriformes) From Asia (India, Late Cretaceous) - Features the publication.
- Monogeneans From Pangasiidae (Siluriformes) - Features the article by Pariselle A, et. al.
- Tree of Life Callichthyidae Armored Catfishes - Contains discussion on characteristics and phylogenetic relationships.
- Oreoglanis Macronemus, A New Species of Glyptosternine [PDF] - Discusses unique features. With photos.
- Families of the Order Siluriformes - Comprehensive listing of all family-group and other suprageneric names.
- Squeakers, Lace or Upside Down Catfishes, Family Mochokidae - Discusses distinguishing characteristics. With photos.
- Trends in the Karyotype Evolution of Loricariidae Fish (Siluriformes) - Article by Roberto Ferreira Artoni and Luiz Antonio Carlos Bertollo. With PDF.
- Notes on the Members of the Genus Cocholiodon [PDF] - Discusses distinguishing features. With photos.
- Tracking Evolutionary Trends in Siluriformes [PDF] - Discusses the adaptations of the group.
- Temporal Region of the Cranium of Loricarioid Catfishes - Presents abstract of the study by Aquino A.E. and Schaefer S.A.
- Synodontis waterloti - Discusses distinguishing features. With links to related sites.
- Channel Catfish Life History and Biology [PDF] - Offers life history and distinguishing traits.
- Underwater Photograph Siluriformes- Catfishes - Shows images of member species.
- Find a Fish Striped Catfish Plotosus lineatus - Discusses distinguishing features. With links to related sites.
- Expedition Caura Catfish - Features an interesting member specie. With photos.
- Flathead Catfish - Shows images. With links to related sites.
- Corydoras Catfish - Discusses distinguishing features. With photos.
- Comprehensive Geographic Rundown of the Lone Star State's Premier Catfish Locales. - Discusses facts and habitat. With links to related sites.
- Locomotor Activity Rhythms in Cave Fishes (Teleostei: Siluriformes) - Article by Trajano E, et. al.. With access to full text.
- Ictalurus punctatus (Rafinesque 1818) - Discusses distinguishing features. With photos.
- Bullheads, Channels, Madtoms/Stonecats: The American Catfishes of the Family Ictaluridae (formerly A - Discusses distribution, size, and habitat.
- Freshwater Fishes Family Clariidae - Features catfishes of Africa, Middle East and Asia. With photos.
- Platydoras costatus (Linnaeus, 1758) - Discusses distinguishing features of member species.
- How to Keep Your New Electric Catfish Malapterurus electricus - Offers links to resources. With photos.
- Facts About Catfish - Discusses distinguishing features. With links to related sites.
- Catfish Facts - Provides strange facts on these species. With photos.
- Nursery Rearing of the Asian Catfish, Clarias macrocephalus - Article by Ruby Bombeo et. al. With links to full text.
- Description of a New Clariid Catfish, Clarias pseudoniehofii [PDF] - Discusses the unique features of this specie.
- Suckermouth Catfishes: Threats to Aquatic Ecosystems of the United States? [PDF] - An article by Alfred Cofrancesco, et. al.
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Stephanoberyciformes
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Tetraodontiformes
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Zeiformes
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Hexanchiformes
- Order Hexanchiformes: Cow Sharks-4 Species - Discusses distinguishing features of the group. With photos.
- Join Enchanted Learning Hexanchiformes - Provides brief lecture on the group. With guide to member species.
- NOVA Online Adventure Hexanchiformes - Discusses unique features of member species. With photos.
- Education Biological Profiles Bigeye Sixgill Shark - Discusses taxonomy, distribution, habitat, biology and conservation.
- Animal Diversity Web Order Haxanchiformes Sixgil and Frilled Sharks - Offers taxonomy guide.
- Education Biological Profiles Bluntnose Sixgill Shark - Features taxonomy, distribution, habitat and conservation. With photos.
- Hexanchus griseus Sixgill Shark - Provides description, range, feeding behavior and history. With photos.
- Order Hexanchiformes - Frilled and Cowsharks - Discusses distinguishing features. With identification key.
- WildMadagascar.org Bluntnose Sixgill Shark- Hexanchus griseus - Lists resources for this specie.
- Natural History of the Sixgill Shark, Hexanchus griseus - Article by John H. Rupp.
- Biology of the Bluntnose Sixgill - Presents identification, distribution, habitat, diet and behavior.
- Fishbase Hexanchus griseus Bluntnose Sixgill Shark - Discusses morphology, biology and profile. With photos.
- Discovery Channel Sharks Living Fossils - Article on hexanchiformes by Alissa Levy.
- Hexanchiformes Sixgill, Sevengill and Frilled Sharks - Describes the unique features of the group. With guide to families.
- Chemistry, Biology and related disciplines in the WWW Cow Sharks (Hexanchiformes): Fishes - Lists member species. With images.
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Lamniformes
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Squaliformes
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Squatiniformes
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Liliopsida >
Asteliaceae
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Bromeliaceae
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Costaceae
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Aextoxicaceae
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