Vertebrate - online puzzles

Vertebrate

Vertebrates () comprise all animal taxa within the subphylum Vertebrata () (chordates with backbones), including all mammals, birds, reptiles, amphibians and fish. Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,963 species described. Vertebrates comprise such groups as the following:

jawless fish, which include hagfish and lampreys

jawed vertebrates, which include:

cartilaginous fish (sharks, rays, and ratfish)

bony vertebrates, which include:

ray-fins (the majority of living bony fish)

lobe-fins, which include:

coelacanths and lungfish

tetrapods (limbed vertebrates)Extant vertebrates range in size from the frog species Paedophryne amauensis, at as little as 7.7 mm (0.30 in), to the blue whale, at up to 33 m (108 ft). Vertebrates make up less than five percent of all described animal species; the rest are invertebrates, which lack vertebral columns.

The vertebrates traditionally include the hagfish, which do not have proper vertebrae due to their loss in evolution, though their closest living relatives, the lampreys, do. Hagfish do, however, possess a cranium. For this reason, the vertebrate subphylum is sometimes referred to as "Craniata" when discussing morphology. Molecular analysis since 1992 has suggested that hagfish are most closely related to lampreys, and so also are vertebrates in a monophyletic sense. Others consider them a sister group of vertebrates in the common taxon of craniata.

Jigsaw Puzzle online puzzlebooties-slippers puzzle online from photoVariety online puzzleAlva und Fio puzzle online from photoJigsaw Puzzle puzzle online from photoBeniu online puzzlemy puzzle online puzzleJigsaw Puzzle puzzle online from photoJigsaw Puzzle puzzle online from photoJigsaw Puzzle online puzzleMushrooms online puzzleBirds cont puzzle online from photoVariety online puzzleCarving from the White Chapel puzzle online from photoJigsaw Puzzle puzzle online from photoSzafiś and Kalusia on a walk :) online puzzleCats and kitties puzzle online from photoBirds ... puzzle online from photoJigsaw Puzzle puzzle online from photoJigsaw Puzzle puzzle online from photoFiku Miku online puzzleJigsaw Puzzle online puzzleWHITE WIZARD puzzle online from photoPuzzle Mix puzzle online from photo
little turtle puzzle online from photoon the glass online puzzleJigsaw Puzzle puzzle online from photoNicholas puzzle online from phototutti frutti puzzle online from photoJigsaw Puzzle online puzzlepaws online puzzleJigsaw Puzzle online puzzlefish for my students online puzzleJigsaw Puzzle puzzle online from photoJigsaw Puzzle online puzzlepuzz mix puzzle online from photoThe animals puzzle online from photoPeacock on the stained glass window online puzzleThe birds online puzzleVariety puzzle online from photoSomething for everyone online puzzleThe Mighty Lion. online puzzleVariety online puzzleJigsaw Puzzle online puzzleJigsaw Puzzle online puzzlemzxio online puzzlewolf puzzle online from photoJigsaw Puzzle puzzle online from photo