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Varanus Louisiadensis
The Louisiade monitor (''Varanus louisiadensis'') is a species of monitor lizard native to the Louisiade Archipelago of Papua New Guinea. The species inhabits all three major islands of the Louisiade Archipelago: Tagula Island, Misima Island, and Rossel Island. It was first described in 2023, alongside '' Varanus tanimbar''. Description ''Varanus louisiadensis'' has a 3% genetic divergence from other species of monitor lizards. Its body is generally black in coloration, with the presence of yellow patterns that become less distinct with age. Measurements taken from a sample of 11 individuals resulted in a snout–vent length Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the mos ... ranging from 115 mm to 460 mm and tail length ranging from 270 mm to 1170 mm. The length of ''V. louisiad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monitor Lizard
Monitor lizards are lizards in the genus ''Varanus,'' the only extant genus in the family Varanidae. They are native to Africa, Asia, and Oceania, and one species is also found in the Americas as an invasive species. About 80 species are recognized. Monitor lizards have long necks, powerful tails and claws, and well-developed limbs. The adult length of extant species ranges from in some species, to over in the case of the Komodo dragon, though the extinct varanid known as megalania (''Varanus priscus'') may have been capable of reaching lengths more than . Most monitor species are terrestrial, but arboreal and semiaquatic monitors are also known. While most monitor lizards are carnivorous, eating eggs, smaller reptiles, fish, birds, insects, and small mammals, some also eat fruit and vegetation, depending on where they live. Distribution The various species cover a vast area, occurring through Africa, the Indian subcontinent, to China, the Ryukyu Islands in sout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louisiade Archipelago
The Louisiade Archipelago is a string of ten larger volcanic islands frequently fringed by coral reefs, and 90 smaller coral islands in Papua New Guinea. It is located 200 km southeast of New Guinea, stretching over more than and spread over an ocean area of between the Solomon Sea to the north and the Coral Sea to the south. The aggregate land area of the islands is about , with Vanatinai (Tagula) being the largest. Rogeia, Samarai and Sariba lie closest to New Guinea, while Misima, Vanatinai, and Rossel islands lie further east. History The islands were discovered by a Spanish expedition led by Luis Váez de Torres in 1606, that was part of the Fernandez de Quiros fleet which had sailed from South America in search of Australia. The Torres expedition visited various islands including Basilaki Island, which he named ''San Buenaventura'' in July 1606. It is possible that Malay and Chinese sailors also visited the islands earlier. More than a century later, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papua New Guinea
Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country in Oceania that comprises the eastern half of the island of New Guinea and its offshore islands in Melanesia (a region of the southwestern Pacific Ocean north of Australia). Its capital, located along its southeastern coast, is Port Moresby. The country is the world's third largest island country, with an area of . At the national level, after being ruled by three external powers since 1884, including nearly 60 years of Australian administration starting during World War I, Papua New Guinea established its sovereignty in 1975. It became an independent Commonwealth realm in 1975 with Elizabeth II as its queen. It also became a member of the Commonwealth of Nations in its own right. There are 839 known languages of Papua New Guinea, on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Island
An island or isle is a piece of subcontinental land completely surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. Sedimentary islands in the Ganges Delta are called chars. A grouping of geographically or geologically related islands, such as the Philippines, is referred to as an archipelago. There are two main types of islands in the sea: continental islands and oceanic islands. There are also artificial islands (man-made islands). There are about 900,000 official islands in the world. This number consists of all the officially-reported islands of each country. The total number of islands in the world is unknown. There may be hundreds of thousands of tiny islands that are unknown and uncounted. The number of sea islands in the world is estimated to be more than 200,000. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagula Island
Vanatinai Island (also called Tagula and Sudest, for the names of the extreme capes of the island) is a volcanic island in the south-east of the Louisiade Archipelago within Milne Bay Province of Papua New Guinea. The reef-fringed island is approximately south-east of New Guinea and south of Misima. With an area of , it is the largest island of the archipelago. Tagula town, the main settlement, is located on the north-west coast. The population was 3628 . The principal export is copra. Geography The island is long, stretching from Cape Tagula to Cape Sudest, and up to wide. A wooded mountain range runs through the length of the island, with the summit, Mount Riu () near the center. The most important peaks of the range are, from west to east: *Mount Madau () *Mount Gangulua () *Mount Riu (formerly called Mount Rattlesnake) () *Mount Imau () *Mount Arumbi () Climate Most of Tagula island has a tropical rainforest climate (Af) but the main settlement of Tagula, locate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misima Island
Misima (formerly called St. Aignan) is a volcanic island in the northwest of Louisiade Archipelago within Milne Bay Province of Papua New Guinea. History Misima Island was inhabited by Austronesians since about 1500 BC. The island was sighted in 1768 by French captain Louis Antoine de Bougainville and explored 1793 by French explorer Antoine Bruni d'Entrecasteaux. Misima island owes its name to Élisabeth-Paul-Édouard de Rossel, which was a lieutenant of the Counter admiral Antoine Bruny d'Entrecasteaux during his journey of scientific exploration. In 1888 the British Empire annexed Misima Island, and it became part of British New Guinea (since 1904 - the Territory of Papua administered by Australia). Gold was discovered on Misima late in 1888. By March 1889, eighty men were on the island digging for gold, and a storekeeper had set up a business. Since 1975, Misima belongs to the independent state of Papua New Guinea. A gold and silver mine was opened on the island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossel Island
Rossel Island (named after de Rossel, a senior officer on the French expedition of d'Entrecasteaux, 1791-1793; also known as Yela) is the easternmost island of the Louisiade Archipelago, within the Milne Bay Province of Papua New Guinea. Tree Islet is situated to the north-west, while Wule Island is situated westward. Geography The mountainous island measures east-west, and is up to wide. With an area of , it is the second largest island of the archipelago, after Vanatinai. The higher parts of the island are almost constantly cloud-capped during the southeast monsoon. The mountain ridges form short, narrow crests, with occasional peaks; their outline is smooth, and the ridges are covered with vegetation. Most of the shoreline is either bordered by mangroves, with occasional sandy beaches, or covered with jungle. From the bluff to the island's north point, very steep hills slope down to the shore. Between the north point of the island and Cape Deliverance are some well-wooded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanimbar Monitor
The Tanimbar monitor (''Varanus tanimbar'') is a species of monitor lizard native to the Tanimbar archipelago of Maluku, Indonesia. It was first described in 2023 using specimens that were preserved at the Western Australian Museum. Another species of ''Varanus'', the Louisiade monitor, was described in the same study. Distribution ''Varanus tanimbar'' is the only species of monitor lizard native to the Tanimbar Islands, where it resides on the two largest islands: Yamdena and Selaru Selaru is an island in Indonesia in the Tanimbar Islands group, Southeast Maluku. It is located south of Yamdena. It is one of the 92 officially listed outlying islands of Indonesia. File:COLLECTIE TROPENMUSEUM Een groep jonge mannen te Adaoet .... References {{Taxonbar, from=Q121593234 Varanus Reptiles described in 2023 Lizards of Indonesia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Divergence
Genetic divergence is the process in which two or more populations of an ancestral species accumulate independent genetic changes (mutations) through time, often leading to reproductive isolation and continued mutation even after the populations have become reproductively isolated for some period of time, as there isn’t genetic exchange anymore. In some cases, subpopulations living in ecologically distinct peripheral environments can exhibit genetic divergence from the remainder of a population, especially where the range of a population is very large (see parapatric speciation). The genetic differences among divergent populations can involve silent mutations (that have no effect on the phenotype) or give rise to significant morphological and/or physiological changes. Genetic divergence will always accompany reproductive isolation, either due to novel adaptations via selection and/or due to genetic drift, and is the principal mechanism underlying speciation. On a molecular gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snout–vent Length
Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the most common measurement taken in herpetology, being used for all amphibians, lepidosaurs, and crocodilians (for turtles, carapace length (CL) and plastral length (PL) are used instead). The SVL differs depending on whether the animal is struggling or relaxed (if alive), or various other factors if it is a preserved specimen. For fossils, an osteological correlate such as precaudal length must be used. When combined with weight and body condition, SVL can help deduce age and sex. Advantages Because tails are often missing or absent, especially in juveniles, SVL is seen as more invariant than total length. Even in the case of crocodiles, tail tips may be missing. Methods The measurements may be taken with dial calipers or digital calipe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reptiles Described In 2023
Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians (tuatara). As of March 2022, the Reptile Database includes about 11,700 species. In the traditional Linnaean classification system, birds are considered a separate class to reptiles. However, crocodilians are more closely related to birds than they are to other living reptiles, and so modern cladistic classification systems include birds within Reptilia, redefining the term as a clade. Other cladistic definitions abandon the term reptile altogether in favor of the clade Sauropsida, which refers to all amniotes more closely related to modern reptiles than to mammals. The study of the traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. The earliest known proto-reptiles originated around 31 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monitor Lizards Of New Guinea
Monitor or monitor may refer to: Places * Monitor, Alberta * Monitor, Indiana, town in the United States * Monitor, Kentucky * Monitor, Oregon, unincorporated community in the United States * Monitor, Washington * Monitor, Logan County, West Virginia * Monitor, Monroe County, West Virginia * Loope, California, formerly Monitor Arts, entertainment, and media Fictional characters * Monitor (Mar Novu), a DC comics character * Monitors (DC Comics), a group of fictional comic book characters, who appear in books published by DC Comics Periodicals * ''Monitor'' (magazine), a weekly newsmagazine published in Podgorica, Montenegro * ''Monitor'' (Polish newspaper), an 18th-century Polish newspaper * ''Concord Monitor'', a daily newspaper in New Hampshire, United States * ''The Monitor'' (Sydney), a biweekly newspaper published between 1826 and 1841 * ''Daily Monitor'', a Ugandan newspaper Television * ''Monitor'' (UK TV programme), a BBC arts programme which aired from 1958 to 196 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
