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Rhinophrynidae
The Rhinophrynidae are a family of frogs containing one extant genus, the monotypic ''Rhinophrynus'', and a number of fossil genera. The family is sometimes known as the Mexican burrowing toads or simply burrowing toads. ''Rhinophrynus'' occurs in the Central America north from Costa Rica to Mexico and Texas. Fossil finds of Rhinophrynidae come from Mexico, the United States, and Canada. ''Rhinophrynus'' is a burrowing ant and termite eater. Systematics The Rhinophrynidae are the sister taxon of the Pipidae. The clade formed by these two genera is sometimes referred to as Xenoanura or Taxonomic rank, superfamily Pipoidea. Genera Extant genera: * ''Rhinophrynus'' or ''Mexican burrowing toad'' Late Eocene-Recent Fossil genera: * †''Chelomophrynus'' Henrici 1991 Wagon Bed Formation, Wyoming United States, Eocene * †''Eorhinophrynus'' Hecht 1959 Polecat Bench Formation, Wyoming, United States, Paleocene * †''Rhadinosteus'' Henrici 1998 Morrison Formation, Utah, United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinophrynus Dorsalis, Burrowing Toad, Tamaulipas
The Mexican burrowing toad (''Rhinophrynus dorsalis'') is the single living representative of the family Rhinophrynidae. It is a unique species in its taxonomy and Morphology (biology), morphology, with special adaptations to assist them in digging burrows where they spend most of their time. These adaptations include a small pointed snout and face, keratinized structures and a lack of webbing on front limbs, and specialized tongue morphology to assist in feeding on ants and termites underground. The body is nearly equal in width and length. It is a dark brown to black color with a red-orange stripe on its back along with splotches of color on its body. The generic name ''Rhinophrynus'' means 'nose-toad', from ''wikt:rhino-, rhino-'' (), the combining form of the Ancient Greek ' (, 'nose') and ' (, 'toad'). The Mexican burrowing toad diverged from other amphibians over 190 million years ago and has been evolving independently for a longer period of time than the evolutionary diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinophrynus
The Mexican burrowing toad (''Rhinophrynus dorsalis'') is the single living representative of the family Rhinophrynidae. It is a unique species in its taxonomy and morphology, with special adaptations to assist them in digging burrows where they spend most of their time. These adaptations include a small pointed snout and face, keratinized structures and a lack of webbing on front limbs, and specialized tongue morphology to assist in feeding on ants and termites underground. The body is nearly equal in width and length. It is a dark brown to black color with a red-orange stripe on its back along with splotches of color on its body. The generic name ''Rhinophrynus'' means 'nose-toad', from ''rhino-'' (), the combining form of the Ancient Greek ' (, 'nose') and ' (, 'toad'). The Mexican burrowing toad diverged from other amphibians over 190 million years ago and has been evolving independently for a longer period of time than the evolutionary differences between mammals like humans, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinophrynidae
The Rhinophrynidae are a family of frogs containing one extant genus, the monotypic ''Rhinophrynus'', and a number of fossil genera. The family is sometimes known as the Mexican burrowing toads or simply burrowing toads. ''Rhinophrynus'' occurs in the Central America north from Costa Rica to Mexico and Texas. Fossil finds of Rhinophrynidae come from Mexico, the United States, and Canada. ''Rhinophrynus'' is a burrowing ant and termite eater. Systematics The Rhinophrynidae are the sister taxon of the Pipidae. The clade formed by these two genera is sometimes referred to as Xenoanura or Taxonomic rank, superfamily Pipoidea. Genera Extant genera: * ''Rhinophrynus'' or ''Mexican burrowing toad'' Late Eocene-Recent Fossil genera: * †''Chelomophrynus'' Henrici 1991 Wagon Bed Formation, Wyoming United States, Eocene * †''Eorhinophrynus'' Hecht 1959 Polecat Bench Formation, Wyoming, United States, Paleocene * †''Rhadinosteus'' Henrici 1998 Morrison Formation, Utah, United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pipoidea
Pipoidea are a clade of frogs, that contains the most recent common ancestor of living Pipidae and Rhinophrynidae as well as all its descendants. It is broadly equivalent to Xenoanura. Description The synapomorphies that define Pipoidea are the absence of mentomeckelian bones, absence of lateral alae of the parasphenoid, fusion of the frontoparietals into an azygous element, greatly enlarged otic capsules, and a tadpole with paired spiracles and which lacks beaks and denticles. Later genetic work has supported Pipoidea as a monophyletic group. Taxonomy In 1993 Pipoidea was defined by Ford and Cannatella as a node-based taxon. It has variously been defined as a suborder (original definition), superfamily, or an unranked clade. There is no single, authoritative higher-level classification of frogs, and Vitt and Caldwell (2014) use name Xenoanura for a similar clade, skipping Pipoidea altogether, as did Frost ''et al.'' (2006). The oldest record of the group is '' Rhadin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelomophrynus
''Chelomophrynus'' is an extinct genus of anurans in the family Rhinophrynidae. A single species is known, ''Chelomophrynus bayi'' from the Uintan Wagon Bed Formation of Wyoming. It was probably a subterranean feeder, like the modern member of the family, ''Rhinophrynus dorsalis''. As most burrowing anurans, it likely used its hind feet for digging, thereby entering ground backwards. See also * Prehistoric amphibian * List of prehistoric amphibians This list of prehistoric amphibians is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be amphibians, excluding purely vernacular terms. The list includes all commonly accepted gen ... References † Prehistoric amphibian genera Eocene amphibians Paleogene amphibians of North America Fossil taxa described in 1991 {{mesobatrachia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibian Families
Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant taxon, extant (living) amphibians belong to the monophyletic subclass (biology), subclass Lissamphibia, with three living order (biology), orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater ecosystem, freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their biological life cycle, life cycle typically starts out as aquatic animal, aquatic larvae with gills known as tadpoles, but some species have devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhadinosteus
''Rhadinosteus parvus'' (meaning "long slender bone") is an extinct species of frogs that lived during the Late Jurassic.Foster, J. (2007). "''Rhadinosteus parvus''." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. p. 137. Fossils of the species were found at the Rainbow Park site in Utah's Dinosaur National Monument, from several slabs of rock which contain multiple partial specimens, from sediments belonging to the Morrison Formation. ''R. parvus'' was likely a member of Pipoidea and may have been a member of the family Rhinophrynidae.Foster, J. (2007). "Appendix." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. pp. 327-329. Description ''Rhadinosteus parvus'' was a moderately sized frog, 42mm in length. Unlike the other members of Pipoidea its skeleton is not specialized for any specific task (such as aquatic life in Pipimorpha species). See also * List of prehistoric am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eorhinophrynus
''Eorhinophrynus'' is an extinct genus of frogs from Wyoming. See also * List of prehistoric amphibians References Paleogene amphibians † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species or languages). It is one of the mo ... Prehistoric amphibian genera Fossil taxa described in 1959 {{mesobatrachia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Jurassic
The Late Jurassic is the third Epoch (geology), epoch of the Jurassic Period, and it spans the geologic time scale, geologic time from 161.5 ± 1.0 to 143.1 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic stratum, strata.Owen 1987. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age. In the past, ''Malm'' was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units. Subdivisions The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock: Paleogeography During the Late Jurassic Epoch, Pangaea broke up into two supercontinents, Laurasia to the north, and Gondwana to the south. The result of this break-up was the emergence of the Atlantic Ocean, which initially was relatively narrow. Life forms This epoch is well known for many famous types of d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morrison Formation
The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone, and limestone and is light gray, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period. It is centered in Wyoming and Colorado, with outcrops in Montana, North Dakota, South Dakota, Nebraska, Kansas, the panhandles of Oklahoma and Texas, New Mexico, Arizona, Utah, and Idaho. Equivalent rocks under different names are found in Canada. It covers an area of 1.5 million square kilometers (600,000 square miles), although only a tiny fraction is exposed and accessible to geologists and paleontologists. Over 75% is still buried under the prairie to the east, and much of its western paleogeographic extent was eroded during exhuma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
