PHYLUM CHORDATA: ORIGEN, EVOLUCIÓN Y DIVERSIDAD EN EL AGUA. Guía de Estudio del Phylum Chordata. Parte I.
Retana Guiascón, Oscar Gustavo.

Campeche, Mexico : San Francisco de Campeche; Universidad Autónoma de Campeche, Colección Universitarios, Serie Documentos Científicos, 2007. Octavo, wraps, 118 p., illus., graphs, tables, bibl. New Paperback 9789685722674 On marine animals, Chordates. Chordates (Chordata, "rope") are a phylum of the animal kingdom is characterized by the presence of a notochord or notochord, either during the entire development or any of its phases. There are nearly 65,000 known species present most belonging to the subphylum vertebrates, and nearly half of which are fish. Content includes: "Origen y evolución de los cordados, Sistemática geneal de los cordados, Phylum o subphylum hemichordata" and "Clase chondrichthyes." 500 copies printed. 1 OCLC holding. (Item ID: 142484)

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