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Crocodylus Checchiai
''Crocodylus checchiai'' is an extinct species of crocodile from the Miocene to Pliocene of Libya and Kenya. ''C. checchiai'' was named in 1947 based on a skull from the Sahabi Formation. Remains from the lower Nawata Formation in the Turkana Basin of Kenya that were first attributed to the Nile crocodile have now been reassigned to ''C. checchiai'', extending its geographic range. The morphology of the species, in particular the pronounced rostral boss, indicates that it may be the connecting link between African and American species of the genus ''Crocodylus''. History and naming The remains of ''C checchiai'' were originally described by the Italian paleontologist Angiola Maria Maccagno in 1938. The holotype, an adult skull with an associated mandible, was discovered in the Sahabi Formation and later stored in the Istituto di Paleontologia dell’Università di Roma, where it was then thought to be lost. In the years following, four more skulls were excavated in Libya and store ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodylus Checchiai
''Crocodylus checchiai'' is an extinct species of crocodile from the Miocene to Pliocene of Libya and Kenya. ''C. checchiai'' was named in 1947 based on a skull from the Sahabi Formation. Remains from the lower Nawata Formation in the Turkana Basin of Kenya that were first attributed to the Nile crocodile have now been reassigned to ''C. checchiai'', extending its geographic range. The morphology of the species, in particular the pronounced rostral boss, indicates that it may be the connecting link between African and American species of the genus ''Crocodylus''. History and naming The remains of ''C checchiai'' were originally described by the Italian paleontologist Angiola Maria Maccagno in 1938. The holotype, an adult skull with an associated mandible, was discovered in the Sahabi Formation and later stored in the Istituto di Paleontologia dell’Università di Roma, where it was then thought to be lost. In the years following, four more skulls were excavated in Libya and store ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prefrontal Bone
The prefrontal bone is a bone separating the lacrimal and frontal bones in many tetrapod skulls. It first evolved in the sarcopterygian clade Rhipidistia, which includes lungfish and the Tetrapodomorpha. The prefrontal is found in most modern and extinct lungfish, amphibians and reptiles. The prefrontal is lost in early mammaliaforms and so is not present in modern mammals either. In dinosaurs The prefrontal bone is a very small bone near the top of the skull, which is lost in many groups of coelurosaurian theropod dinosaurs and is completely absent in their modern descendants, the birds. Conversely, a well developed prefrontal is considered to be a primitive feature in dinosaurs. The prefrontal makes contact with several other bones in the skull. The anterior part of the bone articulates with the nasal bone and the lacrimal bone. The posterior part of the bone articulates with the frontal bone and more rarely the palpebral bone The palpebral bone is a small dermal bone found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Guinea Crocodile
The New Guinea crocodile (''Crocodylus novaeguineae'') is a small species of crocodile found on the island of New Guinea north of the mountain ridge that runs along the centre of the island. The population found south of the mountain ridge, formerly considered a genetically distinct population, is now considered a distinct species, Hall's New Guinea crocodile (''C. halli''). In the past it included the Philippine crocodile, ''C. n. mindorensis'', as a subspecies, but today they are regarded as separate species. The habitat of the New Guinea crocodile is mostly freshwater swamps and lakes. It is most active at night when it feeds on fish and a range of other small animals. A female crocodile lays a clutch of eggs in a nest composed of vegetation and she lies up nearby to guard the nest. There is some degree of parental care for newly hatched juveniles. This crocodile was over-hunted for its valuable skin in the mid 20th century, but conservation measures have since been put in plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Crocodile
The freshwater crocodile (''Crocodylus johnstoni''), also known as the Australian freshwater crocodile, Johnstone's crocodile or the freshie, is a species of crocodile endemic to the northern regions of Australia. Unlike their much larger Australian relative, the saltwater crocodile, freshwater crocodiles are not known as man-eaters, although they bite in self-defence, and brief, nonfatal attacks have occurred, apparently the result of mistaken identity. Taxonomy and etymology When Gerard Krefft named the species in 1873, he intended to commemorate the man who first reported it to him, Australian native police officer and amateur naturalist Robert Arthur Johnstone (1843–1905). However, Krefft made an error in writing the name, and for many years, the species has been known as ''C. johnsoni''. Recent studies of Krefft's papers have determined the correct spelling of the name, and much of the literature has been updated to the correct usage, but both versions still exist. Accor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saltwater Crocodile
The saltwater crocodile (''Crocodylus porosus'') is a crocodilian native to saltwater habitats and brackish wetlands from India's east coast across Southeast Asia and the Sundaic region to northern Australia and Micronesia. It has been listed as Least Concern on the IUCN Red List since 1996. It was hunted for its skin throughout its range up to the 1970s, and is threatened by illegal killing and habitat loss. It is regarded as dangerous to humans. The saltwater crocodile is considered to be the largest living reptile. Males can grow up to a length of , rarely exceeding , and a weight of . Females are much smaller and rarely surpass . It is also called the estuarine crocodile, Indo-Pacific crocodile, marine crocodile, sea crocodile, and informally as the saltie. A large and opportunistic hypercarnivorous apex predator, they ambush most of their prey and then drown or swallow it whole. They are capable of prevailing over almost any animal that enters their territory, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippine Crocodile
The Philippine crocodile (''Crocodylus mindorensis''), also known as the Mindoro crocodile, the Philippine freshwater crocodile, the ''bukarot'' in Ilocano, and more generally as a ''buwaya'' in most Filipino lowland cultures, is one of two species of crocodiles found in the Philippines; the other is the larger saltwater crocodile ''(Crocodylus porosus)''. The Philippine crocodile, the species endemic only to the country, went from data deficient to critically endangered in 2008 from exploitation and unsustainable fishing methods, such as dynamite fishing. Conservation methods are being taken by the Dutch/Filipino Mabuwaya foundation,"Philippine Crocodile Comeback" . cepf.net. Retrieved on 2007-10-22. the Crocodile Conservation Society and the Zoological Institute of HerpaWorld in |
Siamese Crocodile
The Siamese crocodile (''Crocodylus siamensis'') is a medium-sized freshwater crocodile native to Indonesia (Borneo and possibly Java), Brunei, East Malaysia, Laos, Cambodia, Myanmar, Thailand and Vietnam. The species is critically endangered and already extirpated from many regions. Its other common names include Siamese freshwater crocodile, Singapore small-grain, and soft-belly. Phylogeny Below is a cladogram based on a 2018 tip dating study by Lee & Yates simultaneously using morphological, molecular (DNA sequencing), and stratigraphic (fossil age) data, as revised by the 2021 Hekkala ''et al.'' paleogenomics study using DNA extracted from the extinct ''Voay''. Characteristics The Siamese crocodile is a medium-sized, freshwater crocodilian, with a relatively broad, smooth snout and an elevated, bony crest behind each eye. Overall, it is olive-green, with some variation to dark-green. Young individuals measure and weigh , growing to a length of and a weight of as an ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mugger Crocodile
The mugger crocodile (''Crocodylus palustris'') is a medium-sized broad- snouted crocodile, also known as mugger and marsh crocodile. It is native to freshwater habitats from southern Iran to the Indian subcontinent, where it inhabits marshes, lakes, rivers and artificial ponds. It rarely reaches a body length of and is a powerful swimmer, but also walks on land in search of suitable waterbodies during the hot season. Both young and adult mugger crocodiles dig burrows to which they retreat when the ambient temperature drops below or exceeds . Females dig holes in the sand as nesting sites and lay up to 46 eggs during the dry season. The sex of hatchlings depends on temperature during incubation. Both parents protect the young for up to one year. They feed on insects, and adults prey on fish, reptiles, birds and mammals. The mugger crocodile evolved at least and has been a symbol for the fructifying and destructive powers of the rivers since the Vedic period. It was first sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodylus Palaeindicus
''Crocodylus palaeindicus'' is an extinct species of crocodile from southern Asia. ''C. palaeindicus'' lived from the Miocene to the Pliocene. It may be an ancestor of the living Mugger crocodile. History ''C. palaeindicus'' was first named by Scottish paleontologist Hugh Falconer in 1859. Falconer found fossils of the species in the Siwalik Hills of India along with the remains of many other animals like turtles, ostriches, camels, saber-toothed cats, mastodons. Richard Lydekker later named another crocodile from the Siwalik Hills which he called ''C. sivalensis''. Although the two crocodiles are very similar, ''C. sivalensis'' was distinguished from ''C. palaeindicus'' because the margin of its skull was less convex. ''C. sivalensis'' has recently been synonymized with ''C. palaeindicus'', as the slight differences in shape are thought to be from natural variation or from fossilization. In later years, fossils were also found from Pakistan and Myanmar. Classification Histori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodylus Falconensis
''Crocodylus falconensis'' is an extinct species of crocodile known from the early Pliocene of the lower part of the Vergel Member of the San Gregorio Formation of Venezuela. ''C. falconensis'' was named in 2013 after Falcón State and is thought to be the basalmost species of '' Crocodylus'' found in the Neotropics. Description ''C. falconensis'' was a medium-sized species of crocodile with a robust, generalist skull shape. The orbits and the supratemporal fenestrae are notably smaller than those of other ''Crocodylus'' species of the same age, while the nares are comparably larger (however still small relative to the overall skull size). The premaxilla surrounds the nares entirely, excluding the nasal bones from contacting them. Another feature differentiation ''Crocodylus falconensis'' from other species of the genus is that the supraoccipital reaches or at least almost reaches the foramen magnum. The roughly triangular skull had a prominent notch located behind the nares to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morelet's Crocodile
Morelet's crocodile ''(Crocodylus moreletii)'', also known as the Mexican crocodile or Belize crocodile, is a modest-sized crocodilian found only in fresh waters of the Atlantic regions of Mexico, Belize and Guatemala. It usually grows to about in length. It is a Least Concern species. The species has a fossil record in Guatemala. Taxonomy and etymology Morelet's crocodile was first described in 1850 in Mexico by the French naturalist Pierre Marie Arthur Morelet. The species was subsequently named after him. It was long confused with the American and Cuban crocodiles because of similar characteristics and an ambiguous type locality. It was not generally accepted as a separate species until the 1920s. Evolution The genus '' Crocodylus'' likely originated in Africa and radiated outwards towards Southeast Asia and the Americas, although an Australia/Asia origin has also been considered. Phylogenetic evidence supports ''Crocodylus'' diverging from its closest recent relative, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
