rank-based nomenclature, applying definitions from cladistics (or phylogenetic systematics). Its two defining features are the use of phylogenetic definitions of biological taxon names, and the lack of obligatory ranks. It is currently not regulated, but the PhyloCode
(International Code of Phylogenetic Nomenclature) is intended to regulate it once it is ratified.
The terms cladism and cladist were first introduced by
Ernst W. Mayr
in 1965. They sometimes refer to cladistics as a whole.
(similar, but not necessarily related), because not all ungulates appear as closely related as once believed. Ungulata was formerly considered an order which has since been split into:
The Giant salamander (4.7-5.9ft) is the largest surviving Amphibian. Suborder Cryptobranchoidea (krypto="hidden" + branch="lung", a reference to how the members absorb oxygen — through capillaries of their side-frills.)
Osteichthyes is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The oldest known fossils of bony fish are about 420 million years old.
The Giant huntsman spider (Heteropoda maxima) is the world's largest spider by leg-span. See Heteropoda. Goliathus (Goliath beetle) is among the largest insects on Earth.
It is known to be one of the largest living organisms. Scientists have estimated that a single specimen found in Malheur National Forest in Oregon has been growing for some 2,400 years, covering 3.4 square miles. Armillaria solidipes grows and spreads primarily underground and the bulk of the organism lies in the ground, out of sight. It is only visible in the autumn, when it blooms “honey mushrooms”. Low competition for land and nutrients have allowed this organism to grow so huge; it possibly covers more geographical area than any other living organism.
BdelloideaRotifer (βδελλα=leech) They take alternate steps with the head and tail, as do certain Leeches
Evolution of sexual reproduction: Bdelloids reproduce by Parthenogenesis (no males). "Despite the fact that they have been asexual for millions of years, they have diversified into more than 300 species and are fairly similar to other sexually-reproducting rotifer species."
Linnaean taxonomy
The Blue whale is the heaviest animal ever known.
The largest fish is the Whale shark, a slow-moving filter feeding shark.
Cetruminantia
White rhinoceros the largest odd-toed Ungulates, Rhinoceros
The Saltwater crocodile is the largest living Reptile.
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Allacma fusca, a Springtail (Hexapoda that are no longer considered Insects)
Tardigrade (waterbear), phylum Tardigrada, superphylum Ecdysozoa
freshwater Bryozoan with Lophophore extended
Onchocerca volvulus emerging from black fly