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19 de jun. de 2024 · Chordate, any member of the phylum Chordata, which includes the vertebrates, the most highly evolved animals, as well as two other subphyla—the tunicates and cephalochordates. Some classifications also include the phylum Hemichordata with the chordates.
- Evolution and Paleontology
Chordate - Evolution, Paleontology, Anatomy: Chordates may...
- Internal Features
Chordate - Nervous System, Notochord, Muscular System: All...
- Protochordate
protochordate, any member of either of two invertebrate...
- Cephalochordate
cephalochordate, any of more than two dozen species...
- Evolution and Paleontology
19 de jun. de 2024 · Chordate - Evolution, Paleontology, Anatomy: Chordates may have originated earlier than 590 million years ago and predate the fossil record. Hemichordates are probably the closest relatives of chordates.
Há 1 dia · Crocodilia (or Crocodylia, both / krɒkəˈdɪliə /) is an order of mostly large, semiaquatic, predatory reptiles known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria.
11 de jun. de 2024 · We resolve vetulicolians as a paraphyletic group comprising the earliest diverging stem chordates, subtending a grade of more derived stem-group chordates comprising Yunnanozoon and Pikaia. Our phylogenetic results reveal the stepwise acquisition of characters diagnostic of the chordate crown group.
Há 3 dias · Ascidians (Phylum: Chordata, Class: Ascidiacea), or sea squirts, are the largest and most diverse class of the sub-phylum Tunicata (also known as Urochordata). They comprise approximately 3000 described species found in all marine habitats from shallow water to the deep sea.
20 de jun. de 2024 · Variegated golden frog ( Mantella baroni) in the Ranomafana National Park of Madagascar. A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura [1] (coming from the Ancient Greek ἀνούρα, literally 'without tail').
Há 2 dias · Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
