Biosystematics and Organism Classification

The earliest validly published name for a taxon has priority over any other name for that taxon.

The same name cannot be used for two different taxa at the same level.

A system of classifying organisms based on their overall similarity, often using morphological features.

Whittaker proposed a system of classifying organisms into five kingdoms: Animalia, Plantae, Fungi, Protista, and Monera.

Species that are morphologically similar but can still exchange genes when they meet and mate, often due to geographical isolation.

The modern science of classifying organisms, considering evolutionary relationships and genetic data.

A taxonomic category that does not reflect a distinct evolutionary lineage, such as "breed" in dogs.

The order to which the genus Trypanosoma belongs, characterized by their unique kinetoplasts.

The order to which the genus Leishmania belongs, also characterized by the presence of kinetoplasts.

The order to which the genus Giardia belongs, known for their distinctive diplomonad structure.

The order to which the genus Eimeria belongs, known for their importance as coccidia.

A parasite that lacks a cyst stage, typically found in the digestive tract of certain animals.

A parasite that forms a protective cyst stage, allowing for survival outside the host.

The most important genus of coccidia that does not form cysts, known for causing intestinal infections in various animals.

A genus of cystogenic coccidia, known for causing toxoplasmosis in humans and other animals.

The most important genus of piroplasms, known for causing babesiosis in various animals.

A group of parasitic cnidarians that are closely related to traditional cnidarians, often found in fish tissues.

A class of cnidarians that lack a medusa (jellyfish) stage, typically found as polyps.

A class of cnidarians that sometimes lack a polyp stage, featuring a diverse range of forms such as hydroids and jellyfish.

A class of cnidarians where the budding of the polyp stage is terminal, producing new polyps at the top of the old one.

A class of cnidarians where the budding of the polyp stage is lateral, producing new polyps on the sides of the old one.

An invertebrate phylum encompassing approximately 25,000 species, known for their flat body form.

A category of bilaterally symmetric animals, including flatworms and many other groups like roundworms.

A group of flatworms that lack a digestive tract, absorbing nutrients directly through their body surface from their host.

A group of flatworms that have a two-branched (blind ending) gut, used for digestion of food.

A developmental stage in certain parasites, developing from the oncosphere and found in the host's tissues.

An order of cestodes characterized by the presence of a six-hooked oncosphere as the first larval stage.

An adult Taenia worm typically has hundreds of ovaries, responsible for producing eggs.

A group of animals characterized by the presence of a pseudocoelom, a fluid-filled cavity between the body wall and digestive tract.