WebFeb 5, 2024 · Craniates are best described as chordates that have a braincase (also called a cranium or a skull), mandible (jawbone) and other facial bones. Craniates do not include simpler chordates such as … WebOperculum (fish) Tools. Opercular series in bony fish: operculum (yellow), preoperculum (red), interoperculum (green) and suboperculum (pink) The operculum is a series of bones found in bony fish and chimaeras that …
gill slit Encyclopedia.com
WebCharacteristics of Chordata. Animals in the phylum Chordata share five key characteristics that appear at some stage during their development: a notochord, a dorsal hollow (tubular) nerve cord, pharyngeal gill arches or slits, a post-anal tail, and an endostyle/thyroid gland (Figure 29.3).In some groups, some of these key characteristics are present only during … WebFossil fish do occur with full gill slits between the mandibular and hyoid arches, just not jawed fish! ... Current Biology, February 9, 2024. Christine Hirschberger, Victoria A Sleight, Katharine E Criswell, Stephen J Clark, J … evenflo baby toys
Operculum (fish) - Wikipedia
WebOther articles where gill slit is discussed: chordate: General features: …through the mouth, using the gill slits as a kind of filter. The feeding apparatus in cephalochordates is similar. They have a well-developed musculature and can swim rapidly by undulating the body. Cephalochordates usually live partially buried in marine sand and gravel. WebFirst, the gill arches of jawless (agnathan) fishes became modified to form the jaw of the jawed fishes. In the jawless fishes, a series of gills opened behind the jawless mouth. When the gill slits became supported by cartilaginous elements, the first set of these gill supports surrounded the mouth to form the jaw. WebSep 4, 2024 · Evidence from Fossils. Figure 9.3. 2: Evolution of the Horse. The fossil record reveals how horses evolved. The lineage that led to modern horses (Equus) grew … first episode of seinfeld