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Hace 5 días · 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.
Hace 5 días · Etymology. Until the 16th century, sharks were known to mariners as "sea dogs". This is still evidential in several species termed "dogfish," or the porbeagle.The etymology of the word shark is uncertain, the most likely etymology states that the original sense of the word was that of "predator, one who preys on others" from the Dutch schurk, meaning 'villain, scoundrel' (cf. card shark, loan ...
Hace 4 días · Chordata: Class: Mammalia: Order: Artiodactyla: Clade: Cetaceamorpha: Infraorder: Cetacea Brisson, 1762: Subgroups †Pakicetidae †Ambulocetidae †Remingtonocetidae †Protocetidae (paraphyletic) Pelagiceti Uhen, 2008 †Basilosauridae (paraphyletic) †Kekenodontidae; Neoceti Fordyce & de Muizon, 2001. Mysticeti; Odontoceti (see ...
Hace 1 día · The koala ( Phascolarctos cinereus ), sometimes called the koala bear, is an arboreal herbivorous marsupial native to Australia. It is the only extant representative of the family Phascolarctidae and its closest living relatives are the wombats. The koala is found in coastal areas of the mainland's eastern and southern regions, inhabiting ...
Hace 1 día · Tigris regalis Gray, 1867. The tiger ( Panthera tigris) is the largest living cat species and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail, and orange fur with black, mostly vertical stripes.
Hace 5 días · Ailuropodinae ( Pandas) Tremarctinae (Short-faced bears) Ursinae (All other bear species) Bears are carnivoran mammals of the family Ursidae ( / ˈɜːrsɪdiː, - daɪ / ). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats ...
Hace 5 días · Ovis guineensisLinnaeus, 1758Ovis strepsicerosLinnaeus, 1758. Sheep ( pl.: sheep) or domestic sheep ( Ovis aries) are a domesticated, ruminant mammal typically kept as livestock. Although the term sheep can apply to other species in the genus Ovis, in everyday usage it almost always refers to domesticated sheep.
