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Desmatochelys
''Desmatochelys'' (from Greek δεσμός ''desmos'' 'link' + χέλῡς ''khelus'' ‘tortoise’) is an extinct genus of sea turtles belonging to the family Protostegidae. This genus contains two known species, ''D. lowii'' and ''D. padillai''. ''D. lowii'' was first discovered in 1895, followed by ''D. padillai'' in 2015. Having been estimated at over 120 million years old, ''D. padillai'' is currently the oldest known species of sea turtle. ''Desmatochelys'' lived during the Cretaceous, and had a wide geographic range, primarily along the Western Interior Seaway. Taxonomy The genus contains two species: * ''Desmatochelys lowi'' * ''Desmatochelys padillai'' Initially, ''Desmatochelys'' formed its own family, Desmatochelydae. Later it was reassigned into the family Protostegidae. There is some debate among the paleontological community over the placement of Protostegidae (and therefore ''Desmatochelys'') within turtle phylogeny. According to Elizabeth L. Nicholls, the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmatochelys Padillai
''Desmatochelys'' (from Greek δεσμός ''desmos'' 'link' + χέλῡς ''khelus'' ‘tortoise’) is an extinct genus of sea turtles belonging to the family Protostegidae. This genus contains two known species, ''D. lowii'' and ''D. padillai''. ''D. lowii'' was first discovered in 1895, followed by ''D. padillai'' in 2015. Having been estimated at over 120 million years old, ''D. padillai'' is currently the oldest known species of sea turtle. ''Desmatochelys'' lived during the Cretaceous, and had a wide geographic range, primarily along the Western Interior Seaway. Taxonomy The genus contains two species: * ''Desmatochelys lowi'' * ''Desmatochelys padillai'' Initially, ''Desmatochelys'' formed its own family, Desmatochelydae. Later it was reassigned into the family Protostegidae. There is some debate among the paleontological community over the placement of Protostegidae (and therefore ''Desmatochelys'') within turtle phylogeny. According to Elizabeth L. Nicholls, the genu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protostegidae
Protostegidae is a family of extinct sea turtle, marine turtles that lived during the Cretaceous period. The family includes some of the largest sea turtles that ever existed. The largest, ''Archelon'', had a head long. Like most sea turtles, they had flattened bodies and flipper (anatomy), flippers for front appendages; protostegids had minimal carapace, shells like Dermochelyidae, leatherback turtles of modern times. Anatomy As some of the first sea turtle, marine turtles, the protostegids set the general body plan for future species of sea turtles. They had a generally depressed turtle body plan, complete with four limbs, a short tail, and a large head at the end of a relatively short neck. Like other sea turtles, they possessed oar-like front appendages especially evolved for swimming in the open ocean. Similar to the still-extant taxon, extant, possibly closely related Dermochelyidae, protostegids possessed extremely reduced carapaces. Some specimens had skeletal protrusio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santanachelys Gaffneyi
''Santanachelys gaffneyi'' is an extinct species of sea turtle. It is the only species in the genus ''Santanachelys'', which itself is a member of the extinct family Protostegidae. The species was first described from a 20-centimeter long fossil specimen unearthed in 1998 from the Santana Formation of eastern Brazil. From the rock layer from which it was excavated, it was determined that the specimen was from the Early Cretaceous period (112 million years old). It is therefore one of the oldest known sea turtles. but a new fossil named ''Desmatochelys'' ''padillai'' in 2015 is estimated to be as old as 120 million years. While the specimen showed many characteristics of modern sea turtles, it differed from the typical sea turtle body plan in several ways. One glaring difference is that ''Santanachelys'' had distinguishable digits at the tip of its forearms. Instead of the fully fused, hydrodynamic paddles that modern sea turtles possess, the early sea turtle's digits were disti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelonioidea
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, Kemp's ridley, and olive ridley sea turtles. All six of the sea turtle species present in US waters (all of those listed above except the flatback) are listed as endangered and/or threatened under the Endangered Species Act. The seventh sea turtle species is the flatback, which exists in the waters of Australia, Papua New Guinea and Indonesia. Sea turtles can be separated into the categories of hard-shelled (cheloniid) and leathery-shelled ( dermochelyid).Wyneken, J. 2001. The Anatomy of Sea Turtles. U.S Department of Commerce NOAA Technical Memorandum NMFS-SEFSC-470, 1-172 pp. There is only one dermochelyid species which is the leatherback sea turtle. Description For each of the seven types of sea turtles, females and males are the sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Turtle
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, Kemp's ridley, and olive ridley sea turtles. All six of the sea turtle species present in US waters (all of those listed above except the flatback) are listed as endangered and/or threatened under the Endangered Species Act. The seventh sea turtle species is the flatback, which exists in the waters of Australia, Papua New Guinea and Indonesia. Sea turtles can be separated into the categories of hard-shelled (cheloniid) and leathery-shelled ( dermochelyid).Wyneken, J. 2001. The Anatomy of Sea Turtles. U.S Department of Commerce NOAA Technical Memorandum NMFS-SEFSC-470, 1-172 pp. There is only one dermochelyid species which is the leatherback sea turtle. Description For each of the seven types of sea turtles, females and males are the sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinochelys
Rhinochelys is an extinct genus of sea turtles belonging to the family Protostegidae. Fossil records Fossils of ''Rhinochelys'' have been found in Cenomanian-age marine deposits of southern England, Lebanon, and France. Species Three species of ''Rhinochelys'' are recognized:Scavezzoni I, Fischer V. (2018) Rhinochelys amaberti Moret (1935), a protostegid turtle from the Early Cretaceous of France. PeerJ 6:e4594 https://doi.org/10.7717/peerj.4594 * ''Rhinochelys pulchriceps'' (Owen, 1851) * ''Rhinochelys amaberti'' Moret, 1935 * ''Rhinochelys nammourensis'' Tong, Hirayama, Makhoul & Escuillie, 2006Haiyan Tong, Hirayama R., Makhoul, E. & Escuillie F. 2006. Rhinochelys (Chelonioidea : Protostegidae) from the Late Cretaceous (Cenomanian) of Nammoura, Lebanon. Atti della società italiana di scienze naturali e del museo civico di storia naturale di Milano 147 (1) : 113 – 138 ''Rhinochelys cantabrigiensis'' and ''R. elegans'', both named by Richard Lydekker in 1889, are recover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senckenberg Research Institute Courier
''Courier Forschungsinstitut Senckenberg'' (Senckenberg Research Institute Courier) was a multilingual (German and English) scientific journal focusing on geology and paleontology. The Senckenberg Nature Research Society The Senckenberg Nature Research Society (german: link=no, Senckenberg Gesellschaft für Naturforschung, until 2008 ''Senckenbergische Naturforschende Gesellschaft'') is a German scholarly society with headquarters in Frankfurt am Main. Overview ... published 260 volumes from 1973 to 2008. References External links * {{Authority control Defunct journals Publications established in 1973 Publications disestablished in 2008 Multilingual journals Biweekly journals Geology journals Paleontology journals E. Schweizerbart academic journals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Cretaceous
Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Lower Wick is a small hamlet located in the county of Gloucestershire, England. It is situated about five miles south west of Dursley, eighteen miles southwest of Gloucester and fifteen miles northeast of Bristol. Lower Wick is within the civil ... Gloucestershire, England See also * Nizhny {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet or species epithet) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the specific the proper term for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...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] |
