title: 1904 in paleontology
text: # 1904 in paleontology
  
  Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 1904.
  
  ## Dinosaurs
  
  ### Newly named dinosaurs
  
  Data courtesy of George Olshevsky's dinosaur genera list.
  
  | Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images |
  | - | - | - | - | - | - | - | - | - |
  | Algoasaurus | Gen et sp nov | Nomen dubium. | Broom | Late Jurassic-Early Cretaceous | Kirkwood Formation | South Africa | now considered an indeterminate sauropod | Algoasaurus |
  | Centrosaurus | gen et sp nov | Valid | Lambe | Late Cretaceous | Dinosaur Park Formation | Canada ( Alberta) | Type species: Centrosaurus apertus | Centrosaurus |
  
  ## Plesiosaurs
  
  * Plesiosaur gastroliths documented.
  
  ## Synapsids
  
  ### Non-mammalian
  
  | Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images |
  | - | - | - | - | - | - | - | - | - |
  | Glanosuchus | Gen et sp nov | Valid | Broom | Middle Permian | Middle Abrahamskraal Formation | South Africa | A member of Scylacosauridae. | Glanosuchus |
  | Placerias | Gen et sp nov | Valid | Lucas | Late Triassic (Carnian) | Chinle Formation | USA ( Arizona and North Carolina) | A member of Stahleckeriidae. | Placerias |
  | Prodicynodon | Gen et sp nov | Valid | Broom | Late Permian | | | | |
  | Scapanodon | Gen et sp nov | Junior synonym | Broom | Middle Permian | | | A junior synonym of Titanosuchus. | |
  
  ### Metatherians
  
  | Name | Authors | Age | Location | Notes | Images |
  | - | - | - | - | - | - |
  | Argyrolagus | Ameghino | 4 Millions years ago | Argentina | A Distante relative of the Shrew Opossum | |
  
  ### Eutherians
  
  **Cetaceans**
  
  | Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
  | - | - | - | - | - | - | - | - |
  | Eocetus | Nom. nov. | Valid | Fraas | Middle Eocene (Bartonian) | Giushi Formation | Egypt  Morocco | A protocetid. Replacement name for Mesocetus Fraas, 1904 (non van Beneden, 1880). |
  | Mesocetus | Gen. et. sp. nov | | Fraas | Middle Eocene (Bartonian) | | | |
  | Protocetus | Gen. et sp. nov. | Valid | Fraas | Middle Eocene (Lutetian) | Mokattam Formation | Egypt | A protocetid. |
  
  ## Even-toed Ungulates
  
  | Name | Status | Authors | Age | Location | Notes | Images |
  | - | - | - | - | - | - | - |
  | Prosthennops | Valid | Matthew | 10 Millions of years ago | Honduras  Mexico  USA ( Alabama, Florida, Kansas, Maryland, Nebraska, Nevada, Oregon, South Dakota, Texas, Virginia and Washington) | An Extinct Tayassuid. | |
  