WebSep 28, 2024 · This discovery provides substantive morphological and developmental data from a chondrichthyan occurring around 20 million years before the earliest … All chondrichthyans breathe through five to seven pairs of gills, depending on the species. In general, pelagic species must keep swimming to keep oxygenated water moving through their gills, whilst demersal species can actively pump water in through their spiracles and out through their gills. See more Chondrichthyes is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or bony fishes, which have skeletons primarily composed of See more Fertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are viviparous. There is no parental care after birth; however, some chondrichthyans do guard their eggs. See more • Note: Lines show evolutionary relationships. See more • Taxonomy of Chondrichthyes • Images of many sharks, skates and rays on Morphbank See more Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, except in See more Cartilaginous fish are considered to have evolved from acanthodians.The discovery of Entelognathus and several examinations of acanthodian … See more • List of cartilaginous fish • Cartilaginous versus bony fishes • Largest cartilaginous fishes See more
A Tree of Life Project With Some Serious Bite – oceanbites
WebThis work is presented as a summary of the variation observed in the skeletal anatomy, building upon previous works in chondrichthyan anatomy, expanding the current state of knowledge of the diversity in chondrichthyan fish skeletons. This project is part of a collaborative effort to develop a phylogenetic tree of life for modern chondrichthyans. tater tool
Gavin Naylor – The Conversation
WebThe Florida Program for Shark Research, directed by Dr. Gavin Naylor and staffed by a team of research scientists and educators, includes the Chondrichthyan Tree of Life Project, the... WebOct 18, 2024 · Map © Chondrichthyan Tree of Life The tiger shark is found throughout the world’s temperate and tropical waters, with the exception of the Mediterranean Sea. It is a wide-ranging species that is at home both in the open ocean as … WebFeb 14, 2024 · Conduct studies on the diversity of Chondrichthyan fishes through systematics and evolutionary relationships. Use population genetics to determine the … tater time perth