A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs

S. P. Welles

1962

Article

University of California Publications in Geological Sciences 44(1):1-96

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Taxa discussed in this work:

• Alzadasaurinae
• Aptychodon cretaceus
• Callawayasaurus colombiensis
• Callawayasaurus columbiensis
• Cimoliasaurus caudalis
• Cimoliasaurus lissaensis
• Cimoliasaurus teplicensis
• Cimoliosaurus smithi
• Cryptocleidus cuervoi
• Cryptocleidus cuervoi caroli
• Cryptocleidus cuervoi quesadai
• Discosaurus planior
• Elasmosaurinae
• Elasmosaurus amalitskii
• Elasmosaurus kurskensis
• Elasmosaurus orskensis
• Elasmosaurus serdobensis
• Hunosaurus fasseli
• Iserosaurus littoralis
• Nothosaurops occiduus
• Orophosaurus pauciporus
• Piptomerus hexagonus
• Piptomerus megaloporus
• Piptomerus microporus
• Piratosaurus plicatus
• Plesiosaurus andium
• Plesiosaurus brevifemur
• Plesiosaurus continuus
• Plesiosaurus cycnodeirus
• Plesiosaurus euryspondylus
• Plesiosaurus gulo
• Plesiosaurus helmersenii
• Plesiosaurus lockwoodii
• Plesiosaurus mexicanus
• Plesiosaurus microdeirus
• Plesiosaurus mudgei
• Plesiosaurus neogaeus
• Plesiosaurus nordmanni
• Plesiosaurus ophiodeirus
• Plesiosaurus planus trigonalis
• Plesiosaurus platydeirus
• Plesiosaurus platydeirus
• Plesiosaurus poecilospondylus
• Plesiosaurus vaccinsulensis
• Pliosaurus planus
• Polycotylus brevispondylus
• Polycotylus donicus
• Polycotylus epigurgitis
• Polycotylus ichthyospondylus tanais
• Polycotylus orientalis
• Polycotylus ultimus
• Polyptychodon mackesoni
• Polyptychodon neocomiensis
• Polyptychodon patagonicus
• Purranisaurus potens
• Stereosaurus cratynotus
• Stereosaurus platyomus
• Stereosaurus stenomus

Taxonomy:

• Namuncurania belongs to Plesiosauria - Rusconi (1943)
• Cryptocleidus cuervoi caroli belongs to Cryptocleidus cuervoi - Torre and Rojas (1949)
• Cryptocleidus cuervoi quesadai belongs to Cryptocleidus cuervoi - Torre and Rojas (1949)
• Elasmosaurus amalitskii belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus bernardi belongs to Plesiosauria - Welles (1962)
• Plesiosaurus balticus belongs to Plesiosauria - Welles (1962)
• Elasmosaurus serdobensis belongs to Elasmosauridae - Welles (1962)
• Elasmosaurus orskensis belongs to Elasmosauridae - Welles (1962)
• Elasmosaurus orientalis belongs to Plesiosauria - Welles (1962)
• Cimoliosaurus nazarowi belongs to Plesiosauria - Welles (1962)
• Trinacromerum latimanus belongs to Dolichorhynchops - Welles (1962)
• Iserosaurus littoralis belongs to Plesiosauria - Welles (1962)
• Hunosaurus fasseli belongs to Plesiosauria - Welles (1962)
• Plesiosaurus lockwoodii belongs to Plesiosauria - Welles (1962)
• Cimoliasaurus teplicensis belongs to Plesiosauria - Welles (1962)
• Cimoliasaurus lissaensis belongs to Plesiosauria - Welles (1962)
• Aptychodon cretaceus belongs to Plesiosauria - Welles (1962)
• Stereosaurus stenomus belongs to Plesiosauria - Welles (1962)
• Stereosaurus platyomus belongs to Plesiosauria - Welles (1962)
• Stereosaurus cratynotus belongs to Plesiosauria - Welles (1962)
• Polycotylus ichthyospondylus tanais belongs to Dolichorhynchopidae - Welles (1962)
• Polycotylus epigurgitis belongs to Plesiosauria - Welles (1962)
• Polycotylus brevispondylus belongs to Dolichorhynchopidae - Welles (1962)
• Pliosaurus planus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus poecilospondylus belongs to Plesiosauria - Welles (1962)
• Cimoliasaurus caudalis belongs to Elasmosauridae - Welles (1962)
• Uronautes cetiformis belongs to Plesiosauria - Welles (1962)
• Polycotylus tenuis belongs to Plesiosauria - Welles (1962)
• Plesiosaurus traversii belongs to Plesiosauria - Welles (1962)
• Plesiosaurus australis belongs to Plesiosauria - Welles (1962)
• Piptomerus microporus belongs to Plesiosauria - Welles (1962)
• Piptomerus megaloporus belongs to Plesiosauria - Welles (1962)
• Piptomerus hexagonus belongs to Plesiosauria - Welles (1962)
• Orophosaurus pauciporus belongs to Plesiosauria - Welles (1962)
• Nothosaurops occiduus belongs to Tetrapoda - Welles (1962)
• Mauisaurus brachiolatus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus brevifemur belongs to Plesiosauria - Welles (1962)
• Embaphias circulosus belongs to Plesiosauria - Welles (1962)
• Elasmosaurus intermedius belongs to Plesiosauria - Welles (1962)
• Polycotylus ultimus belongs to Plesiosauria - Welles (1962)
• Polycotylus orientalis belongs to Plesiosauria - Welles (1962)
• Polycotylus donicus belongs to Plesiosauria - Welles (1962)
• Pliosaurus gigas belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus vaccinsulensis belongs to Tetrapoda - Welles (1962)
• Cimoliosaurus smithi belongs to Plesiosauria - Welles (1962)
• Plesiosaurus pachyomus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus helmersenii belongs to Elasmosauridae - Welles (1962)
• Aphrosaurus furlongi belongs to Aphrosaurus - Welles (1962)
• Plesiosaurus nordmanni belongs to Plesiosauria - Welles (1962)
• Oligosimus grandaevus belongs to Plesiosauria - Welles (1962)
• Discosaurus vetustus belongs to Plesiosauria - Welles (1962)
• Discosaurus planior belongs to Plesiosauria - Welles (1962)
• Namuncurania malarguense belongs to Tetrapoda - Welles (1962)
• Alzadasaurus tropicus belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus neogaeus belongs to Plesiosauridae - Welles (1962)
• Plesiosaurus andium belongs to Ischyrhiza chilensis - Welles (1962)
• Morenosaurus stocki belongs to Morenosaurus - Welles (1962)
• Fresnosaurus drescheri belongs to Fresnosaurus - Welles (1962)
• Peloneustes kanzleri belongs to Plesiosauria - Welles (1962)
• Leurospondylus ultimus belongs to Leurospondylus - Welles (1962)
• Hydrotherosaurus alexandrae belongs to Hydrotherosaurus - Welles (1962)
• Ogmodirus belongs to Alzadasaurinae - Welles (1962)
• Morenosaurus belongs to Alzadasaurinae - Welles (1962)
• Fresnosaurus belongs to Alzadasaurinae - Welles (1962)
• Aphrosaurus belongs to Alzadasaurinae - Welles (1962)
• Alzadasaurus belongs to Alzadasaurinae - Welles (1962)
• Alzadasaurinae belongs to Elasmosauridae - Welles (1962)
• Elasmosaurinae belongs to Elasmosauridae - Welles (1962)
• Woolungasaurus glendowerensis belongs to Elasmosauridae - Welles (1962)
• Cimoliasaurus cantabrigiensis belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus planus trigonalis belongs to Plesiosauria - Welles (1962)
• Plesiosaurus constrictus belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus ophiodeirus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus microdeirus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus ichthyospondylus belongs to Dolichorhynchops - Welles (1962)
• Plesiosaurus euryspondylus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus cycnodeirus belongs to Plesiosauria - Welles (1962)
• Lutkesaurus belongs to Plesiosauria - Welles (1962)
• Elasmosaurus kurskensis belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus planus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus platydeirus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus mudgei belongs to Plesiosauria - Welles (1962)
• Plesiosaurus gouldii belongs to Plesiosauria - Welles (1962)
• Mauisaurus gardneri belongs to Elasmosauridae - Welles (1962)
• Polyptychodon mackesoni belongs to Tetrapoda - Welles (1962)
• Plesiosaurus gurgitis belongs to Elasmosauridae - Welles (1962)
• Plesiosaurus continuus belongs to Plesiosauria - Welles (1962)
• Plesiosaurus latispinus belongs to Plesiosauria - Welles (1962)
• Polyptychodon neocomiensis belongs to Plesiosauria - Welles (1962)
• Plesiosaurus neocomiensis belongs to Plesiosauria - Welles (1962)
• Plesiosaurus degenhardti belongs to Plesiosauria - Welles (1962)