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Há 2 dias · The vertebrates are the only chordate group with neural cephalization, and their neural functions are centralized towards a series of vesicular enlargements in the head, which give rise to a brain.
Há 3 dias · Background. 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.
Há 19 horas · Feeding and digestive system. Lancelets are passive filter feeders, [14] spending most of the time half-buried in sand with only their frontal part protruding. [66] They eat a wide variety of small planktonic organisms, such as bacteria, fungi, diatoms, and zooplankton, and they will also take detritus. [67]
Há 1 dia · Salamandroidea. Native distribution of salamanders (in green) Salamanders are a group of amphibians typically characterized by their lizard -like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All ten extant salamander families are grouped ...
Há 5 dias · Enantiornithes. The Enantiornithes, also known as enantiornithines or enantiornitheans in literature, are a group of extinct avialans ("birds" in the broad sense), the most abundant and diverse group known from the Mesozoic era. [3] [4] [5] Almost all retained teeth and clawed fingers on each wing, but otherwise looked much like modern birds ...
Há 4 dias · Kalqyl has published an updated analysis of Chordate Medical following the company’s Q1 report released on May 24. In the...
Há 4 dias · The Cambrian explosion (also known as Cambrian radiation [1] or Cambrian diversification) is an interval of time approximately 538.8 million years ago in the Cambrian period of the early Paleozoic when a sudden radiation of complex life occurred, and practically all major animal phyla started appearing in the fossil record.
