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The Holocene extinction, also referred to as the Anthropocene extinction, [3] [4] is an ongoing extinction event caused by human activities during the Holocene epoch. This extinction event spans numerous families of plants [ 5 ] [ 6 ] [ 7 ] and animals, including mammals , birds, reptiles, amphibians , fish, and invertebrates , impacting both ...
World fisheries and aquaculture production of aquatic animals by area and relative shares of world production, 2022. Total fish production in 2016 reached an all-time high of 171 million tonnes, of which 88% was utilized for direct human consumption, resulting in a record-high per capita consumption of 20.3 kg (45 lb). [12]
The Osteolepiformes and Elpistostegalia are two crown groups of rhipidistians with respect to the tetrapods. [2] The development of skull roof and cheekbone patterns in these organisms match those found in the first tetrapods. Palatal and nasal skeletal features like choanae are present in these groups and are also observed in modern amphibians.
The Bivalvia would comprise about 14% of the total and the other five classes less than 2% of the living molluscs. [21] In 2009, Chapman estimated the number of described living mollusc species at 85,000. [3] Haszprunar in 2001 estimated about 93,000 named species, [22] which include 23% of all named marine organisms. [23]
Lampreys form a superclass containing 38 known extant species of jawless fish. [3] The adult lamprey is characterized by a toothed, funnel-like sucking mouth. Although they are well known for boring into the flesh of other fish to suck their blood , [ 4 ] only 18 species of lampreys are actually parasitic. [ 5 ]
3.1 Amphibians. 3.2 Mammals. 3.3 Reptiles. ... 3.4 Fish. 3.5 Birds. 4 References. Toggle the table of contents. List of critically endangered species in the United ...
The list below largely follows Darrel Frost's Amphibian Species of the World (ASW), Version 5.5 (31 January 2011). Another classification, which largely follows Frost, but deviates from it in part is the one of AmphibiaWeb , which is run by the California Academy of Sciences and several of universities.
The smallest amphibian (and vertebrate) in the world is a frog from New Guinea (Paedophryne amauensis) with a length of just 7.7 mm (0.30 in). The largest living amphibian is the 1.8 m (5 ft 11 in) South China giant salamander ( Andrias sligoi ), but this is dwarfed by prehistoric temnospondyls such as Mastodonsaurus which could reach up to 6 m ...