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Hoburogekko
''Hoburogekko'' is an extinct genus of gecko that includes a single species, ''Hoburogekko suchanovi'', from the Early Cretaceous of Mongolia. It is known from two fossil specimens, one preserving the front part of the skull and the other preserving part of the lower jaw. ''Hoburogekko'' is one of four known Mesozoic geckos or gecko-like lizards, the others being ''Cretaceogekko'' from the Early Cretaceous of Burma, AMNH FR21444, an undescribed specimen from a slightly older deposit in Mongolia, and ''Gobekko'' from the Late Cretaceous of Mongolia. ''Hoburogekko'' is the third oldest known gecko behind AMNH FR21444 and ''Cretaceogekko''. Description The skull of ''Hoburogekko'' is short, blunt, and tall. The proportions of its skull bones are similar to those of the living genus ''Bunopus'', although the two are not closely related. The general appearance of ''Hoburogekko'' resembles that of the living species ''Agamura persica'', ''Bunopus tuberculatus'', ''Pristurus carteri'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gekkonomorpha
Gekkonomorpha is a clade of lizards that includes geckos and their closest relatives. Although it was first named in 1900, Gekkonomorpha was not widely used as a formal taxon until it was given a phylogenetic definition in the 1990s. Under this definition, Gekkonomorpha is a stem-based taxon containing the node-based taxon Gekkota, the group that includes the last common ancestor of all living geckos and its descendants. The extent of Gekkonomorpha beyond gekkotans differs between studies. For example, Lee (1998) defined Gekkonomorpha in such a way that it included not only Gekkota but the legless amphisbaenian and dibamid lizards as well. The phylogenetic analysis of Conrad (2008), which did not support a close relationship between geckos and legless lizards, used Gekkonomorpha in a much more restrictive sense so that it included only Gekkota and a few extinct lizards more closely related to Gekkota than to any other living group of lizards (making them "stem" gekkotans). Some of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gobekko
''Gobekko'' is an extinct genus of gecko or gecko-like lizard from the Late Cretaceous Djadokhta Formation of the Gobi Desert in Mongolia. ''Gobekko'' is either a basal member of Gekkota, the group that includes geckos and the legless pygopodid lizards, or a stem-gekkotan outside Gekkota but within the larger group Gekkonomorpha. It is the fourth oldest known member of Gekkonomorpha after ''Hoburogekko'', a gecko from the Early Cretaceous of Mongolia, AMNH FR21444, an unnamed specimen also from the Early Cretaceous of Mongolia, and ''Cretaceogekko ''Cretaceogekko'' (meaning “Cretaceous gecko”) is an extinct monotypic genus of gecko (represented by the type species ''Cretaceogekko burmae'') known from a single partial specimen preserved in Burmese amber from the Cenomanian of Myanmar. T ...'', a gecko preserved in amber from the Early Cretaceous of Burma. References Cretaceous lizards Late Cretaceous lepidosaurs of Asia Geckos Djadochta fauna Gobi Desert Fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous
The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Proposals for the exact age of the Barremian-Aptian boundary ranged from 126 to 117 Ma until recently (as of 2019), but based on drillholes in Svalbard the defining early Aptian Oceanic Anoxic Event 1a (OAE1a) was carbon isotope dated to 123.1±0.3 Ma, limiting the possible range for the boundary to c. 122–121 Ma. There is a possible link between this anoxic event and a series of Early Cretaceous large igneous provinces (LIP). The Ontong Java-Manihiki-Hikurangi large igneous province, emplaced in the South Pacific at c. 120 Ma, is by far the largest LIP in Earth's history. The Ontong Java Plateau today covers an area of 1,860,000 km2. In the Indian Ocean another LIP began to form at c. 120 Ma, the Kerguelen P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meckelian Groove
The Meckelian groove (or Meckel's groove, Meckelian fossa, or Meckelian foramen, or Meckelian canal) is an opening in the medial (inner) surface of the mandible (lower jaw) which exposes the Meckelian cartilage. Modern mammals (which includes placental
Placental mammals (infraclass Placentalia ) are one of the three extant subdivisions of the class Mammalia, the other two being Monotremata and Marsupialia. Placentalia contains the vast majority of extant mammals, which are partly distinguishe ... mammals) do not have a Meckeli ...
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Clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between organisms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carphodactylidae
The Carphodactylidae, informally known as the southern padless geckos, are a family of geckos, lizards in the infraorder Gekkota. The family consists of 32 described species in 7 genera, all of which are endemic to Australia. They belong to the superfamily Pygopodoidea (or Diplodactyloidea), an ancient group of east Gondwanan geckos now only found in Australasia. Despite their well-developed limbs, molecular phylogenies have demonstrated that Carphodactylidae is the sister group to Pygopodidae, a highly specialized family of legless lizards. Carphodactylids, despite being the most species-poor family of geckos, are still diverse in habits. Many have unusual, specialized tails with reduced rates of autotomy. They lack adhesive toepads and instead cling to bark or substrate with sharply curved claws and a limited array of lamellae. Carphodactylids are relatively large by gecko standards; most are nocturnal and all are oviparous, with a typical clutch size of two eggs. Unlike mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polytomy
An internal node of a phylogenetic tree is described as a polytomy or multifurcation if (i) it is in a rooted tree and is linked to three or more child subtrees or (ii) it is in an unrooted tree and is attached to four or more branches. A tree that contains any multifurcations can be described as a multifurcating tree. Soft polytomies vs. hard polytomies Two types of polytomies are recognised, soft and hard polytomies. Soft polytomies are the result of insufficient phylogenetic information: though the lineages diverged at different times – meaning that some of these lineages are closer relatives than others, and the available data does not allow recognition of this. Most polytomies are soft, meaning that they would be resolved into a typical tree of dichotomies if better data were available. In contrast, a hard polytomy represents a true divergence event of three or more lineages. Applications Interpretations for a polytomy depend on the individuals, that are represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gekkota
Geckos are small, mostly carnivorous lizards that have a wide distribution, found on every continent except Antarctica. Belonging to the infraorder Gekkota, geckos are found in warm climates throughout the world. They range from . Geckos are unique among lizards for their vocalisations, which differ from species to species. Most geckos in the family Gekkonidae use chirping or clicking sounds in their social interactions. Tokay geckos (''Gekko gecko'') are known for their loud mating calls, and some other species are capable of making hissing noises when alarmed or threatened. They are the most species-rich group of lizards, with about 1,500 different species worldwide. All geckos, except species in the family Eublepharidae lack eyelids; instead, the outer surface of the eyeball has a transparent membrane, the cornea. They have a fixed lens within each iris that enlarges in darkness to let in more light. Since they cannot blink, species without eyelids generally lick t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pygopodid
Pygopodidae, commonly known as legless lizards, snake-lizards, or flap-footed lizards, is a family of squamates with reduced or absent limbs, and are a type of gecko. At least 35 species are placed in two subfamilies and eight genera. They have unusually long, slender bodies, giving them a strong resemblance to snakes. Like snakes and most geckos, they have no eyelids, but unlike snakes, they have external ear holes and flat, unforked tongues. They are native to Australia and New Guinea. Pygopodids have no fore limbs at all, but they do possess vestigial hind limbs in the form of small, flattened flaps. These may have some role in courtship and defensive behaviour, and may even aid in locomotion through vegetation. Some species are insectivorous burrowing animals, but others are adapted to moving through dense spinifex or other vegetation. Shared gecko characteristics The pygopodids and other geckos share a number of characteristics: * the production of parchment-shelled e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllurus
''Phyllurus'' is a small genus of Australian leaf-tailed geckos, lizards in the family Carphodactylidae. Rarely seen outside their native habitat, they are notable for their highly effective camouflage which is in part aided by the spiny tubercles that cover every body part. Most member species, except for ''P. caudiannulatus'', ''P. gulbaru'' and ''P. kabikabi'', have very flattened, leaf-shaped tails. Some of these species have recently been reassigned to the genus ''Saltuarius''. The ''Phyllurus'' geckos resemble the ''Uroplatus'' geckos of Madagascar. This is an example of convergent evolution because they are not closely related. Species The following species are recognized as being valid. www.reptile-database.org. *'' Phyllurus amnicola'' Couper, Schneider, Hoskin & Covacevich, 2000 – Mount Elliot leaf-tailed gecko *'' Phyllurus caudiannulatus'' Covacevich, 1975 – Bulburin leaf-tailed gecko *'' Phyllurus championae'' Couper, Schneider, Hoskin & Covacevich, 2000– Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllurus Platurus
The broad-tailed gecko, southern leaf-tailed gecko, or Sydney leaf-tailed gecko (''Phyllurus platurus'') is a common gecko of the family Carphodactylidae found in the Sydney Basin. The species uses its mottled colour to camouflage against bark or rock, and if threatened can drop its large fleshy tail as a decoy. The tail is also useful for fat storage. This species of gecko is available in captivity as a pet, they are a nocturnal ambush hunter, relying on camouflage and patience to catch prey. Primary prey items include large nocturnal invertebrates such as spiders, cockroaches and beetles. Description Snout to vent length of 9.5 cm. Total length up to 15 cm. Mottled brown in colour with low bumpy tubercules over the body, original tails are mottled the same colour as the body with large slightly spiny tubercules, whereas regenerated tails are chunkier mottled and smooth. Habitat Common generally in the greater Sydney Basin area, north to Newcastle and south to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic
In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An unrooted tree diagram (a network) makes no assumption about the ancestral line, and does ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
