Two species are described in the literature: A. ramidus, which lived about 4. 4 million years ago during the early Pliocene, and A. kadabba, dated to approximately 5. 6 million years ago ( late Miocene ).

Two Bacillus species are considered medically significant: B. anthracis, which causes anthrax, and B. cereus, which causes a foodborne illness similar to that of Staphylococcus.

* Two species of Malagasy Hippopotamus

Two of the three sampled species within Cricetulus represent the earliest split.

Two dwarf species, named Orcinus nanus and Orcinus glacialis, were described during the 1980s by Soviet researchers, but most cetacean researchers are skeptical about their status, and linking these directly to the types described below is difficult.

Two of his works, the first edition of the Species Plantarum ( 1753 ) for plants and the tenth edition of the Systema Naturae ( 1758 ), are accepted as among the starting points of nomenclature ; his binomials ( names for species ) and his generic names take priority over those of others.

Two kinds of lizards, the Mourning Gecko ( Lepidodactylus lugubris ) and Snake-eyed Skink ( Ablepharus boutonii ) are present on Malden, together with brown libellulid dragonfly and large colonies of Sooty Terns and other migratory seabirds ( nineteen species in all ).

Two examples are kamacite and taenite, which are found in iron meteorites ; these species differ by the amount of Ni in the alloy ; kamacite has less than 5 – 7 % nickel and it's a variety of native iron, whereas the nickel content of taenite ranges from 7 – 37 %.

* Two new fossil penguin species found in Peru

Two planarian species have been used successfully in the Philippines, Indonesia, Hawaii, New Guinea, and Guam to control populations of the imported giant African snail Achatina fulica, which was displacing native snails.

Two water molecules are oxidized by four successive charge-separation reactions by photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions ; the electron yielded in each step is transferred to a redox-active tyrosine residue that then reduces the photoxidized paired-chlorophyll a species called P680 that serves as the primary ( light-driven ) electron donor in the photosystem II reaction center.

Two species of Pteranodon are traditionally recognized as valid: Pteranodon longiceps, the type species, and Pteranodon sternbergi.

Two species, P. orogensis and P. orientalis, are not pteranodontids and have been renamed Bennettazhia oregonensis and Bogolubovia orientalis respectively.

Two endangered species of birds are found here: the California least tern and the California clapper rail.

Two categories are at the species level ; two, at the individual level.

* Two different species of three-spined sticklebacks in each of five different lakes

Two uteri usually form initially in a female fetus, and in placental mammals they may partially or completely fuse into a single uterus depending on the species.

Two species are currently recognized, although others have been assigned in the past.

Two other species of small turtles are the American mud turtles and musk turtles that live in an area that ranges from Canada to South America.

Two species of Hippopotamus, the European Hippopotamus ( H. antiquus ) and H. gorgops ranged throughout continental Europe and the British Isles.

Two other species, Bdellovibrio starrii and Bdellovibrio stolpii, have been moved to a separate genus Bacteriovorax.

Two submarines of the United States Navy have been named USS Tang, after the tang, or surgeonfish, especially of the several West Indian species.

( 1984 ) Two new species of Acanthocephalan Parasites of marine fishes from Bay of Bengal off Purri coast Orissa.

Two muscle fibers belonging to the same motor unit are identified and the temporal variability in their firing patterns are measured.

* 1879 – War of the Pacific: Two Chilean ships blocking the harbor of Iquique ( then belonging to Peru ) battle two Peruvian vessels in the Battle of Iquique.

Two years later in Paris he repeated the proposal, listing the stone as one of several key items belonging to Egypt's cultural heritage, a list which also included the iconic bust of Nefertiti in the Egyptian Museum of Berlin ; a statue of the Great Pyramid architect Hemiunu in the Roemer-und-Pelizaeus-Museum in Hildesheim, Germany ; the Dendara Temple Zodiac in the Louvre in Paris ; and the bust of Ankhhaf from the Museum of Fine Arts, Boston.

" Two centuries later, Europeans perceived Saracens as poor, uneducated idolaters belonging to a group wholly separate from the Arabs who brought Aristotle to the Latin West and the Moors and Berbers fighting Christians in Spain ; someone who got all of his or her information on Islam from medieval sources would not conclude the three groups represented one continuous culture.

Two car ferries belonging to the Weiße Flotte operate every half-an-hour between the Zudar peninsula on Rügen and Stahlbrode on the mainland, halfway between Stralsund and Greifswald.

Two excellent early examples of this form, belonging respectively to Archbishop St. Heribert ( 1021 ) and Archbishop St. Anno ( d. 1075 ), are preserved in Siegburg, Archdiocese of Cologne.

Today, only Sperry, Granite Park, and Belton Chalets are still in operation, while a building formerly belonging to Two Medicine Chalet is now Two Medicine Store.

Two seals bearing her name, belonging to her servants and dating to the Sargonic period, have been excavated at the Royal Cemetery at Ur.

Two electrons belonging to the same atom can not have the same four quantum numbers, due to the Pauli exclusion principle.

Two possible other dated objects, one dated to a Year 19 and another year 20, have been suggested as belonging to him, but neither have been accepted as dating to his reign.

Two large swine production companies that export mainly to the USA, Germany and Japan, a recycled containerboard mill and box factory privately owned by Sonoran investors, as well as one brewery belonging to the FEMSA group ( recently acquired from Heineken ), are among the main industries in Navojoa.

Two ships of the United States Navy have borne the name USS Perch, named in honor of the perch, a type of fresh-water spiny-finned fish belonging to the family Percidae.

Two hotel employees ( Sorrell Booke and Stefan Gierasch ) attempt to steal the jewels belonging to Mrs. Van Hoskins, while Mr. Jones attempts to get the bag belonging to Mr. Smith.

Two men with the title " auditors of the Jews " were entrusted with the execution of this ordinance, and were to take cognizance of all claims that might arise in connection with goods belonging to the Jews which had been sold before the expulsion for less than half of what was regarded as a fair price.

Two notable monuments in this province are the Hatuniye Medrese of the 15th century, built by Sultan Bayezid II, and a Seljuk bridge spanning the Yeşilırmak River, belonging to the 12th century.

Two inscriptions carved on the face of Alvand mountain, belonging to Darius and Xerxes.

Two fossil species are also recognised, each belonging to a separate genus.

Two of the most important insect orders, Lepidoptera and Diptera, along with Trichoptera, probably evolved from ancestors belonging to, or strictly related to, the Mecoptera.

Two pairs of bronze legs, belonging to sellae curules, preserved in the museum at Naples ( Museo Borbonico, vol.

Two items belonging to each of the " accursed twelve " ( that is, Dimwit Flathead and his eleven siblings ) must be placed into the cauldron and the magic word must be spoken.

Two tribes of the Andaman Islands, belonging to India, have sought to avoid contact with the outside world.

Two historical bridging points exist at Bridgnorth to the North and Bewdley to the South, and whilst the bridge belonging to the former National Coal Board was deemed unsafe for general vehicular traffic there exists in Hampton Loade a private bridge used by the emergency services.