Description: This is a juvenile Titanothere humerus that I found on our private lease last year. The measurements are about 14 inches long. This bone has been soaked in penetrant so it is solid and won't crack or break. As these bones washed down the rivers before being deposited, they bounced around and the ends broke off. The bone has cracks filled in, but is still solid and very heavy. The ends of the bone are long gone from erosion and deposition. Cool piece BrontotheriidaeFrom Wikipedia, the free encyclopediaJump to navigationJump to searchBrontotheres Temporal range: 56–34 Ma PreЄЄOSDCPTJKPgNEoceneBrontotherium hatcheri skeleton at the National Museum of Natural History, Washington, DCScientific classificationKingdom:AnimaliaPhylum:ChordataClass:MammaliaOrder:PerissodactylaFamily:†Brontotheriidae Marsh, 1873GeneraSee textSynonymsMenodontidaeTitanotheriidaeBrontotheriidae, also called Titanotheriidae, is a family of extinct mammals belonging to the order Perissodactyla, the order that includes horses, rhinoceroses, and tapirs. Superficially, they looked rather like rhinos, although they were actually more closely related to horses; Equidae and Brontotheriidae make up the suborder Hippomorpha. They lived around 56–34 million years ago, until the very close of the Eocene.Contents1Characteristics and evolution2Classification of Brontotheres3Notes4References5External linksCharacteristics and evolution[edit]MegaceropsSkull of RhinotitanBrontotheres retain four toes on their front feet and three toes on their hind feet. Their teeth are adapted to shearing (cutting) relatively nonabrasive vegetation. Their molars have a characteristic W-shaped ectoloph (outer shearing blade).The evolutionary history of this group is well known, due to an excellent fossil record in North America.[1] The earliest brontotheres, such as Eotitanops, were rather small, no more than a meter in height, and were hornless.Brontotheres, over time, evolved massive body sizes, although some small species, such as Nanotitanops, did persist through the Eocene. Some genera, such as Dolichorhinus, evolvedhighly elongated skulls. Later brontotheres were massive in size, up to 2.5 m (8.2 ft) in height with bizarre horn-like skull appendages. For instance the North American brontothere Megacerops evolved large sexually dimorphic paired horns above their noses. The sexually dimorphic horns suggest that brontotheres were highly gregarious (social) and males may have performed some sort of head-clashing behavior in competition for mates. However, unlike rhinos, the horns of brontotheres are composed of bone, the frontal bone and nasal bone, and were placed side-to-side rather than front-to-back.Brontotheres probably became extinct due to an inability to adapt to drier conditions and tougher vegetation (such as grasses) that spread during the Oligocene.[1]Classification of Brontotheres[edit]Classification for Brontotheriidae after Mihlbachler 2008[2] And Mader 2010[3] Brontotheriidae Eotitanopinae Palaeosyopinae Brontotheriinae Brontotheriini Rhadinorhinina Telmatheriina Brontotheriina Brontotheriita Embolotheriita Two classification systems for Brontotheriidae are presented below. The first contains 43 genera and 8 subfamilies, and although it is based on a 1997 publication by McKenna and Bell, it summarizes research that was conducted before 1920 and is badly outdated. The second classification is based on 2004 and 2005 research by Mihlbachler et al., which indicates that many of the previous subfamily names are invalid. Several more recently discovered brontotheres are included in the newer classification.Life reconstruction of Protitanops curr
Price: 349.99 USD
Location: Torrington, Wyoming
End Time: 2025-02-07T22:31:07.000Z
Shipping Cost: 20 USD
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