Phylum Anthocerotophyta

Carbondale - United States

Provides a classification of the hornworts at the rank of genus and above.

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Anthocerotophyta
United States

The hornworts are an unusual group of plants of which many people are unaware and are so named because of their curious reproductive structures.

Anthocerotophyta
United States

The classification of the hornworts based on Hyvonen and Piippo (1993), with references for taxonomic papers.

Anthocerotophyta
United States

Phylogenetic tree for the Hornworts from the Tree of Life Web Project and a photograph of a species of Phaeoceros.

Phylum Annelida
United States

The segmented worms, including earthworms, polychaete worms, and leeches.

Phylum Arthropoda
United States

Philip Myers's introduction to Phylum Arthropoda, from the Animal Diversity Web.

Phylum Mollusca
United States

Information about mollusks from the Animal Diversity Web.

United States

Brief description of each class of Mollusks.

United States

Brief description of the phylum with illustrations of a species of Phascolosoma.

Phylum Chordata
United States

Brief introduction to the chordates, defined as organisms that possess a structure called a notochord, at least during some part of their development. Includes links to information about subgroups and representative animals.

Phylum Echinodermata
United States

Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars.