Xiphiacetus

{{Short description|Extinct genus of mammals}}

{{Automatic Taxobox

| fossil_range = Miocene, {{fossilrange|20.43|7.246}}

| image = Xiphiacetus sp.jpg

| image_caption = Fossil X. bossi

| taxon = Xiphiacetus

| authority = {{Harvnb|Lambert|2005}}

| subdivision_ranks = Species

| subdivision =

• †X. bossi
  {{Harvnb|Kellogg|1925}}
• †X. cristatus
  {{Harvnb|du Bus|1872}}

}}

Xiphiacetus is an extinct genus of cetacean known from the Miocene (early Burdigalian to late Tortonian, {{Mya|

20.430|7.246}} of Europe and the U.S. East Coast.{{Paleodb|67732|Xiphiacetus}}. Retrieved September 2013.{{Cite web|title=Xiphiacetus (Eurhinodelphis) - The Long-Snouted Dolphin - Facts and Fossil Examples|url=https://www.fossilguy.com/gallery/vert/mammal/marine/eurhinodelphis/eurhinodelphis_miocene.htm|access-date=2022-02-14|website=www.fossilguy.com|language=en-us}}

{{Harvnb|du Bus|1872}} described Priscodelphinus cristatus based on partial and poorly preserved skulls with extremely long and narrow rostra with a huge number of densely packed teeth. He estimated the rostrum of a large specimen to be {{Convert|90|cm|abbr=on}} long and the cranium to be {{Convert|20|cm|abbr=on}} long and slightly wider. He also found a series of well-preserved cervicals and a few of the anterior-most thoracics.{{Harvnb|du Bus|1872|pp=497–498}}

{{Harvnb|Kellogg|1925}} described Eurhindelphis bossi based on an almost complete skull missing ear bones, both mandibles, sixteen vertebrae, ten ribs, an incomplete scapula, a humerus, and a partial sternum. Kellogg named his species after its discoverer, Norman H. Boss, who had discovered the type specimen in 1918.{{Harvnb|Kellogg|1925|p=8}} Kellogg also described several other fossils.

{{Harvnb|Lambert|2005}} recombined these two taxa and placed them under the generic name Xiphiacetus.{{Paleodb|67732|Xiphiacetus}}. Retrieved September 2013.