The aardvark is not closely related to the pig ; rather, it is the sole recent representative of the obscure mammalian order Tubulidentata, in which it is usually considered to form one variable species of the genus Orycteropus, the sole surviving genus in the family Orycteropodidae.

Wallace did extensive fieldwork, first in the Amazon River basin and then in the Malay Archipelago, where he identified the Wallace Line that divides the Indonesian archipelago into two distinct parts, one in which animals closely related to those of Australia are common, and one in which the species are largely of Asian origin.

The eyed and eyeless forms of A. mexicanus, being members of the same species, are closely related and can interbreed.

These characteristics originally defined the genus, but not all such species are closely related, and many have been moved to other genera.

Zebrafish are also closely related to the genus Devario, as demonstrated by a phylogenetic tree of close species.

During Charles Darwin's studies on the Galápagos Islands, Darwin observed 13 species of finches that are closely related and differ most markedly in the shape of their beaks.

In the United States, the cane toad closely resembles many bufonid species.

Only a few species are arboreal-the North American gray fox, the closely related Channel Island fox, and the raccoon dog habitually climb trees.

Colloquially, the common chimpanzee is often called the chimpanzee ( or " chimp "), though technically this term refers to both species in the genus Pan: the common chimpanzee and the closely related bonobo, formerly called the pygmy chimpanzee.

Orcas and some closely related species belong to the Delphinidae family and therefore qualify as dolphins, even though they are called whales in common language.

Recent genetic evidence, however, suggests Callorhinus is more closely related to some sea lion species, and the fur seal / sea lion subfamily distinction has been eliminated from many taxonomies.

The fossil record ( especially the sister species Pinguinus alfrednewtoni ) and molecular evidence show that the three genera, while closely related, diverged soon after their common ancestor, a bird probably similar to a stout Xantus's Murrelet, had spread to the coasts of the Atlantic.

These differences grow larger between less closely related species.

What is more, many an individual invertebrate taxon has a greater number and variety of species than the entire subphylum Vertebrata, In fact some of the so-called invertebrata, such as the Chaetognatha and Hemichordata, are more closely related the Chordata than to other invertebrate phyla.

The golden jackal is more closely related to wolves and coyotes than to other jackal species.

The term orca is preferred by some to avoid the negative connotations of " killer ", and because, being part of the family Delphinidae, the species is more closely related to other dolphins than to whales.

The Lesser Kestrel ( F. naumanni ), which much resembles a small Common Kestrel with no black on the upperside except wing and tail tips, is probably not very closely related to the present species, and the American Kestrel ( F. sparverius ) is apparently not a true kestrel at all.

The kittiwakes ( genus Rissa ) are two closely related seabird species in the gull family Laridae, the Black-legged Kittiwake ( R. tridactyla ) and the Red-legged Kittiwake ( R. brevirostris ).

In essential structural characteristics, as well as in general appearance and habits, all the animals of this genus very closely resemble each other, so whether they should be considered as belonging to one, two, or more species is a matter of controversy among naturalists.

In this case, closely related species may regularly interbreed, but hybrids will be selected against and the species will remain distinct.

The Order Microbiotheria ( which has only one species, the monito del monte ) is found in South America, but is believed to be more closely related to the Australian marsupials.

Charles Darwin | Darwin's illustrations of beak variation in the Darwin's finches | finches of the Galápagos Islands, which hold 13 closely related species that differ most markedly in the shape of their beaks.

neapolitanum ); of these, the neapolitanum group more closely resembles the natural wild species.

The chromosome sets may be from the same species or from closely related species.

MacLean stressed correctly the importance of the visceral brain for preservation of the individual and the species, as evidenced by the influence of the limbic brain ( including the hypothalamus ) on emotions related to fight and flight and also on sexual functions.

In another study chromium-substituted aluminum oxyhydroxides and related species, prepared homogeneously by high-temperature hydrolysis, are being characterized and investigated spectrally in the ultraviolet region with a view to identification and semiquantitative estimation of the phases formed under varying preparative conditions.

These structures are intimately related to social attachment and bonding in other species.

This idea leads into the understanding of how abiotic stress and endangered species are related.

African horse sickness is related to Bluetongue and is spread by the same midges ( Culicoides species ).

Investigating how plant species are related to each other allows botanists to better understand the process of evolution in plants.

The horns of bongos are in the form of a lyre and bear a resemblance to those of the related antelope species of nyalas, sitatungas, bushbucks, kudus and elands.

Communication is observed within the plant organism, i. e. within plant cells and between plant cells, between plants of the same or related species, and between plants and non-plant organisms, especially in the root zone.

Fungi communicate with their own and related species as well as with nonfungal organisms in a great variety of symbiotic interactions, especially with bacteria, unicellular eukaryotes, plants and insects through semiochemicals of biotic origin.

Behavioral coordination and production of signalling substances is achieved through interpretation processes that enables the organism to differ between self or non-self, abiotic indicator, biotic message from similar, related, or non-related species, and even filter out " noise ", i. e. similar molecules without biotic content.

Suggestions for improvement in the operation of CITES include: more regular missions by the Secretariat ( not reserved just for high profile species ); improvement of national legislation and enforcement ; better reporting by Parties ( and the consolidation of information from all sources-NGOs, TRAFFIC, the wildlife trade monitoring network and Parties ); more emphasis on enforcement-including a technical committee enforcement officer ; the development of CITES Action Plans ( akin to Biodiversity Action Plans related to the Convention on Biological Diversity ) including: designation of Scientific / Management Authorities and national enforcement strategies ; incentives for reporting and timelines for both Action Plans and reporting.

Capybara, rabbits, hamsters and other related species do not have a complex ruminant digestive system.

It is the sole species of the genus Anethum, though classified by some botanists in a related genus as Peucedanum graveolens ( L .) C. B. Clarke.

The class of grammar-based codes are recently noticed because they can extremely compress highly repetitive text, for instance, biological data collection of same or related species, huge versioned document collection, internet archives, etc.

Most predictions of forestry related biodiversity loss are based on species-area models, with an underlying assumption that as the forest declines species diversity will decline similarly.

Depending on the species, the digitalis plant may contain several deadly physiological and chemically related cardiac and steroidal glycosides.

Birds of prey, waterfowl, and song birds are more susceptible to eggshell thinning than chickens and related species, and DDE appears to be more potent than DDT.