Protitanops

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BRONTOTHERIIDAE
Taxonomy Phylogeny

Class: Mammalia
Superorder: Ungulata
Order: Perissodactyla
Suborder: Hippomorpha
Superfamily: Brontotheroidea
Family: BRONTOTHERIIDAE

Traditional classification:
  • Subfamily Lambdotheriinae
  • Subfamily Palaeosyopinae
  • Subfamily Dolichorhininae
  • Subfamily Embolotheriinae
  • Subfamily Brontopinae
  • Subfamily Telmatheriinae
  • Subfamily Menodontinae


Newer classification: 
o Hippomorpha
`--o Brontotheriidae
   |--Eotitanops
   |--Palaeosyops
   |?-Protitanops
   `--+?-o Metatelmatheriinae
      |  |?- Sthenodectes
      |  `-- Metatelmatherium
      |--o Dolichorhininae
      |  |-- Mesatirhinus
      |  `-- Dolichorhinus
      `--+?-o Embolotheriinae
         |  |--+-- Epimanteoceras
         |  |  `-- Dolichorhinoides
         |  `--+--o †Protitan
         |     `--+-- Gnathotitan
         |        `--+--o Rhinotitan
         |           `--+--Parabrontops
         |              `--+--Aktautitan
         |                 `--+--+--Brachydiastematherium 
         |                    |  `-- Metatitan
         |                    `--Embolotherium
         `--o Telmatheriinae
            |--Telmatherium
            `--+--Pseudodiplacodon
               `--+?- Notiotitanops
                  `--+--Duchesneodus
                     `--+--Brontops
                        |--Menops
                        `--Megacerops


Protitanops ("Before Titan's Face") was a genus of brontothere that lived during the Eocene, in the Western United States, especially in Death Valley, California, where the best specimens of the species P. curryi have been found. It bore a strong resemblance to Brontops brontotheres with its knob-shaped horns. However, the position of the horns differed in Protitanops, in that they pointed straight up, rather than more forwards, like in Brontops.


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