The rough-skinned newt ( Taricha granulosa ) from North America and other members of its genus contain the neurotoxin tetrodotoxin ( TTX ), the most toxic non-protein substance known and almost identical to that produced by pufferfish.

The most conspicuous genus in the family is Aloe.

The genus Allium includes some of the most widely used edible plants, such as onion and shallot ( varieties of Allium cepa ), garlic ( A. sativum and A. scordoprasum ), leek ( Allium ampeloprasum var.

Bluegrass refers to several species of grasses of the genus Poa ( with the most famous being the Kentucky bluegrass )

The Bacillus-specific study with the most diversity covered is by Xu and Cote ' using 16S and the ITS region, where they divide the genus into 10 groups, which includes the nested genera Paenibacillus, Brevibacillus, Geobacillus, Marinibacillus and Virgibacillus.

These classifications are arbitrary, and most taxonomies over the twentieth century have placed the chipmunks in a single genus.

It was considered to be the first species of the genus Homo until May 2010, when a new species, Homo gautengensis was discovered in South Africa, that most likely arose earlier than Homo habilis.

The variety produced by honey bees ( the genus Apis ) is the one most commonly referenced.

Although the word jackal has been historically used to refer to many small-to medium-sized species of the wolf genus of mammals, Canis, today it most properly and commonly refers to three species: the black-backed jackal and the side-striped jackal of sub-Saharan Africa, and the golden jackal of northern Africa and south-central Eurasia.

The greatest innovation of Linnaeus, and still the most important aspect of this system, is the general use of binomial nomenclature, the combination of a genus name and a second term, which together uniquely identify each species of organism.

While the species that make up the Mentha genus are widely distributed and can be found in many environments, most Mentha grow best in wet environments and moist soils.

is the Japanese name for edible seaweed species of the red alga genus Porphyra, including most notably P. yezoensis and P. tenera, called laver in Wales and other English-speaking countries and Gim in Korean-though the rampant popularity of sushi in the United States means that the United States is often an exception to this, either referring to the product as " nori " as the Japanese do, or simply " seaweed ".

The Permian – Triassic extinction event, labeled " End P " here, is the most significant extinction event in this plot for marine genus | genera which produce large numbers of fossils.

The Pyrenees are relatively as rich in endemic species as the Alps, and among the most remarkable instances of that endemism is the occurrence of the monotypic genus Xatardia ( family Apiaceae ), only on a high alpine pass between the Val d ' Eynes and Catalonia.

The genus most abundantly represented in the range is that of the saxifrages, several species of which are endemic here.

Mangroves are a diverse group of shrubs and trees belonging to the genus Avicennia or Rhizophora that flourish in the salt water shallows of the gulf, and are the most important habitats for small crustaceans that dwell in them.

The genus is present in most layers of the Niobrarra Formation except for the upper two ; in 2003, Kenneth Carpenter surveyed the distribution and dating of fossils in this formation, demonstrating that Pteranodon sternbergi existed there from 88 to 85 million years ago, while P. longiceps existed between 86 and 84. 5 million years ago.

Due to the subtle variations between specimens of pteranodontid from the Niobrara Formation, most researchers have assigned all of them to the single genus Pteranodon, in at least two species ( P. longiceps and P. sternbergi ) distinguished mainly by the shape of the crest.

" True rats " are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus.

Thyme () is any of several species of culinary and medicinal herbs of the genus Thymus, most commonly Thymus vulgaris.

Most were members of the Candida genus ; the most common species in honey stomachs was Dekkera intermedia and in flower nectaries, Candida blankii.

When a female reproduces without such parasitic meals, she is said to practise autogenous reproduction, as in Toxorhynchites ; otherwise, the reproduction may be termed anautogenous, as occurs in mosquito species that serve as disease vectors, particularly Anopheles and some of the most important disease vectors in the genus Aedes.

Galanthus nivalis is the best-known and most widespread representative of the genus Galanthus.

X. laevis takes 1 to 2 years to reach sexual maturity and, like most of its genus, it is tetraploid.

Flora of China treats Cyclobalanopsis as a distinct genus, but most taxonomists consider it a subgenus of Quercus.

Lake Tana supports a large fishing industry, mainly involving the Labeobarbus barbs ( formerly in genus Barbus ), Nile tilapia and sharptooth catfish ( a large catfish that is widespread in Africa ).

The genus includes the widespread common pawpaw Asimina triloba, which bears the largest edible fruit indigenous to the continent.

Cortinarius is a very widespread genus of agarics, but also contains some secotioid species, such as C. leucocephalus, C. coneae and C. cartilagineus.

The large and widespread Accipiter genus includes goshawks, sparrowhawks, the Sharp-shinned Hawk and others.

Although Ginkgo biloba and other species of the genus were once widespread throughout the world, their range shrank until by two million years ago it was restricted to a small area of China.

The blackberry is a widespread and well known shrub of the Rubus genus, and its fruit.

Scaevola is the only Goodeniaceae genus that is widespread outside of Australia.

The genus also includes the much smaller longheaded eagle ray, Aetobatus flagellum, which is a widespread but uncommon species of Indian Ocean and western Pacific coasts.

The genus is widespread, and estimated to contain 1072 species.

According to the Dictionary of the Fungi ( 10th edition, 2008 ), the widespread genus contains over 300 species.

The remaining genus, Grus, contains the most species and is the most widespread genus, although only a single species occurs in Africa as a wintering migrant.

It is the most widespread member of the wheatear genus Oenanthe in Europe and Asia.

This species, Africa's most widespread member of the genus Corvus, occurs from Sub-Saharan Africa, specifically Senegal, Sudan, Somalia and Eritrea down to the Cape of Good Hope and on the large island of Madagascar, the Comoros islands, Aldabra, Zanzibar, Pemba and Fernando Po.

The genus is widespread, occurring across most of the world, except the driest deserts, rainforests and the mainland of Antarctica.

The center of diversity of this genus is in the montage forests of Papua New Guinea ( more than 600 species ) which seems to be the evolutionary homeland, though the genus is pantropical and widespread, occurring in Australia, Southeast Asia ( with over 200 species in Borneo ), India, Madagascar ( with 135 species, some endemic ), Africa and in tropical central and South America.

The Coal Tit, also in this genus, is a much more widespread species, ranging from the British Isles and North Africa to Japan.

The genus Naja contains 20 to 22 species of cobras, and is the most widespread and recognized genus of cobras, ranging from Africa through the Middle East, India, and Southeast Asia to Indonesia.

What appears to be an ancestral form, Geronticus balcanicus, was found in the late Pliocene of Bulgaria, further illustrating the early widespread presence of this genus in Europe, and suggesting that Geronticus eremita may have originated in southeastern Europe or the Middle East.

Aside from humans ( genus Homo ), the macaques are the most widespread primate genus, ranging from Japan to Afghanistan and, in the case of the barbary macaque, to North Africa.