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Animal Classification

Across
a mammal with a complex placenta which connects a fetus to the mother; sometimes called placental mammals
describing an animal in which the mouth develops first during embryogenesis and a second opening developing into the anus
jawed fishes with paired fins and a skeleton made of cartilage
an egg-laying mammal
salamanders and caecilians
a phylum of animals distinguished by their possession of a notochord a dorsal hollow nerve cord pharyngeal slits and a post-anal tail at some point during their development
a phylum of animals with no true tissues but a porous body with a rudimentary endoskeleton
Down
a clade of chordates that includes all groups except the tunicates and lancelets
describing an animal in which the blastopore develops into the anus with the second opening developing into the mouth
bony fishes
a phylum of Ecdysozoa with jointed appendages and segmented bodies
a four-footed animal; includes amphibians reptiles birds and mammals
a phylum of animals that are diploblastic and have radial symmetry and stinging cells
a clade of animals that possesses an amniotic egg; includes reptiles (including birds) and mammals