Decennatherium

{{Short description|Extinct genus of mammals}}

{{Automatic taxobox

| fossil_range = Late Miocene (Tortonian) {{Fossil range|11.6|7.8}}

| image = Decennatherium rex male skull.PNG

| image_caption = Skull of the male D. rex holotype specimen

| taxon = Decennatherium

| authority = Crusafont, 1952

| subdivision_ranks = Species

| subdivision =

• D. pachecoi Crusafont, 1952
• D. crusafonti Bosscha-Erbrink, 1976
• D. rex Ríos, Sánchez & Morales, 2017
• D. asiaticum Ríos, Danowitz & Solounias, 2019

| subdivision_ref = {{Cite journal|author1=Maria Rios |author2=Melinda Danowitz |author3=Nikos Solounias |year=2019 |title=First identification of Decennatherium Crusafont, 1952 (Mammalia, Ruminantia, Pecora) in the Siwaliks of Pakistan |journal=Geobios |volume=57 |pages=97–110 |doi=10.1016/j.geobios.2019.10.007 |bibcode=2019Geobi..57...97R |s2cid=212818436 }}

}}

Decennatherium is an extinct genus of giraffids. The genus contains a total of four species with two species from Spain, D. pachecoi and D. rex, and two species respectively from Iran and Pakistan, D. crusafonti and D. asiaticum. In 2025, Solounias and Danowitz assigned the YGSP 47357, 6392, and 47192, previously referred to Lyrakeryx, to Decennatherium.{{cite book|last1=Solounias|first1=N.|last2=Danowitz|first2=M.|year=2025|chapter=Siwalik Giraffoidea|editor1=Badgley, C.|editor2=Morgan, M.E.|editor3=Pilbeam, D.|title=At the Foot of the Himalayas: Paleontology and Ecosystem Dynamics of the Siwalik Record|publisher=Johns Hopkins University Press|pages=361|isbn=978-1421450278}}