end-Devonian. †Cephalaspids: early jawless fish Cyclostomes: Lampreys and Hagfish †Osteostraci: bony-armoured jawless fish. Agnathans do not have jaws,...

they evolved from jawed fish. It is the sister group of the Agnatha, the jawless vertebrates/fish. The Gnathostomata first appeared in the Ordovician period...

Vertebrata (vertebrates – animals with backbones; 57,739 species) Agnatha (jawless vertebrates; 100+ species) Myxini or Hyperotreti (hagfish; 65 species)...

fish, and logos, meaning knowledge. It includes hagfish and lampreys (jawless fish), cartilagenous fish (such as sharks, skates and rays) (Chondrichthyes)...

cyclostomi) are the lamprey and hagfish. They are the only two living jawless fish, the Agnatha. Recent molecular data from rRNA, and from mtDNA, show...

Lampreys are jawless fish, whose adults are characterized by a toothed, funnel-like, sucking mouth. Lampreys belong to the order Petromyzontiformes. They...

plankton from the water column. Purnell, Mark A. 2002. Feeding in extinct jawless heterostracan fishes and testing scenarios of early vertebrate evolution...

partial exterior, dwelling in seas and oceans. Some other examples include: Jawless fish Armoured fish Cartilaginous fish Ray-finned fish Lobe-finned fish...

The ostracoderms are a class of extinct fish. They were bony-armoured jawless fish, the Osteostraci ("bony shields"). They lived in what is now North...

fish and other marine organisms. The Devonian fish included the Agnatha (jawless fish), the Acanthodii (spiny fish), the Placoderms (armoured fish), the...

system. These two facts may be connected. Subphylum Vertebrata Agnatha (jawless vertebrates) Myxini Hyperoartia (lampreys) †Conodonta †Pteraspidomorphi...

bladder, and elastic cartilage. It is present in all vertebrates above the jawless fish. In humans, elastin is encoded by the ELN gene. Sage EH, Gray WR (1977)...

San Francisco CA. Janvier P. (2010). "MicroRNAs revive old views about jawless vertebrate divergence and evolution". Proceedings of the National Academy...

the early Devonian about 400 million years ago (mya). It was one of the jawless fishes, or ostracoderms, which were common at the time. They were discovered...

530 million years ago during the Cambrian explosion. One of the earliest jawless fish evolved, including Haikouichthys, who dates back from the Middle Cambrian...

anchovy herring sardine sprats Demersal cod flatfish pollock Major groups Jawless hagfish lampreys Cartilaginous chimaeras sharks rays Bony spiny-finned...

anchovy herring sardine sprats Demersal cod flatfish pollock Major groups Jawless hagfish lampreys Cartilaginous chimaeras sharks rays Bony spiny-finned...