Thalattosuchia is the name given to a clade of marine crocodylians from the Early Jurassic to the Early Cretaceous that had a cosmopolitan distribution. The conservation status of a species is an indicator of the likelihood of that species continuing to survive. ... Lower Jurassic (also known as Lias) is the earliest of three epochs of the Jurassic period. ... The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous period. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Subregnum Parazoa Porifera (sponges) Subregnum Agnotozoa Placozoa (trichoplax) Orthonectida (orthonectids) Rhombozoa (dicyemids) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Myxozoa (slime animals) Superphylum Deuterostomia (blastopore becomes anus) Chordata (vertebrates, etc. ... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Superclasses Anapsida Eurapsida Diapsida Reptilia was an old kingdom or phylum classification that has since been divided into 4 classes. ... Classes Ichthyosauria Sauropterygia Lepidosauria Archosauria Diapsids (two arches) are a group of tetrapod animals that developed two holes (temporal fenestra) in each side their skulls, about 300 million years ago during the late Carboniferous period. ... Groups Order Rhynchosauria Order Trilophosauria Order Prolacertiformes Plesion     Archosauriformes Division        Archosauria Archosauromorpha (Greek for ruling reptiles form) are a diverse group or Infraclass of diapsid reptiles that first appeared during the late Permian, but only became common during the Triassic. ... Mesoeucrocodylia is the name of the clade that has replaced the paraphyletic suborder Mesosuchia in phylogenetic taxonomy. ... 1901 (MCMI) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... Subfamilies Family Crocodylidae    Crocodylinae    Alligatorinae    Gavialinae Crocodylia (or crocodylians) is an order of large reptiles that scientists believe branched off from class Reptilia about 220 million years ago. ... The worlds oceans as seen from the South Pacific Ocean Oceans (from Okeanos in Greek, the ancient Greeks noticing the strong current that flowed off Gibraltar and assuming it was a great river) cover almost three quarters (71%) of the surface of the Earth, and nearly half of the... Motto: (French for God and my right) Anthem: Multiple unofficial anthems Capital London Largest city London Official language(s) English Government Constitutional monarchy  - Queen Queen Elizabeth II  - Prime Minister Tony Blair MP Unification    - by Athelstan AD927  Area    - Total 130,395 km² (1st in UK)   50,346 sq mi   - Water (%) Population... A clade is a term belonging to the discipline of cladistics. ... Subfamilies Family Crocodylidae    Crocodylinae    Alligatorinae    Gavialinae Crocodylia (or crocodylians) is an order of large reptiles that scientists believe branched off from class Reptilia about 220 million years ago. ... The Jurassic Period is a major unit of the geologic timescale that extends from about 200 Ma (million years ago), at the end of the Triassic to 146 Ma, at the beginning of the Cretaceous. ... The Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period, about 146 million years ago (Ma), to the beginning of the Paleocene epoch of the Tertiary period (65. ...

Thalattosuchia was named by Fraas in 1901 in order to form a stable name for the Metriorhynchidae. Various authors have considered this to be either an infraorder or a suborder within Mesosuchia. However the term Mesosuchia is no longer considered valid as it is a paraphyletic group. 1901 (MCMI) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... Paleo Template Project Metriorhynchids were a group of aquatic crocodilians that lived in seas during the Jurassic and Cretaceous periods. ... Mesosuchians were a group of terrestrial, semi-aquatic, or fully aquatic crocodilian reptiles. ... Paraphyletic - Wikipedia /**/ @import /skins-1. ...

Since Buffetaut, 1982 demonstrated the shared characteristics of the early forms of Metriorhynchidae and Teleosauridae, Thalattosuchia has consisted of these two families. Paleo Template Project Metriorhynchids were a group of aquatic crocodilians that lived in seas during the Jurassic and Cretaceous periods. ... Paleo Template Project The teleosaurids were marine crocodilians similar to the modern gharial. ...

Some of the early members of Teleosauridae have been discovered in non-marine deposits suggesting thalattosuchians 'moved' from being semi-aquatic freshwater forms to fully-marine forms.

References

• Buffetaut, E. (1982). Radiation évolutive, paléoécologie et biogéographie des Crocodiliens mésosuchienes. Mémoires Societé Geologique de France 142: 1–88

• Fraas, E. (1902). Die Meer-Krocodilier (Thalattosuchia) des oberen Jura unter specieller Berücksichtigung von Dacosaurus und Geosaurus. Paleontographica 49: 1-72