"Myelencephala" is a word in ENGLISH

The lowest group of Vertebrata, including the amphioxus, in which no skull exists.

The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals.

The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms.

The class of Vertebrata that includes the birds.

A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord.

A comprehensive division of the Vertebrata, including all those that have a skull.

A grand division of the Vertebrata, including the Amphibia and Fishes.

A comprehensive division of the animal kingdom, including all except the Vertebrata.

The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The …

The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by …

A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a …

The Vertebrata.

Same as Vertebrata.

The class of Vertebrata that includes the fishes. The principal divisions are Elasmobranchii, Ganoidei, and Teleostei.

One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the Vertebrata, Tunicata, Mollusca, …

One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or …

One of the Vertebrata.

Of or pertaining to the Vertebrata; -- used only in the form vertebrate.