Hippos and their ancestors to scale
Turns out
one of the largest hippos of all time is extant. Fossil taxa were smaller to much smaller (Fig 1). Eocene Oodectes is a small oreodont at the base of clades leading to the hippo clade.
Figure 1. Hippopotamus and its relatives and ancestors to scale.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg?w=106″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg?w=363″ class=”size-full wp-image-89712″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg” alt=”Figure 1. Hippopotamus and its relatives and ancestors to scale.” width=”584″ height=”1647″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg?w=584&h=1647 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg?w=53&h=150 53w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg?w=106&h=300 106w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/hippo-ancestors588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Hippopotamus and its relatives and ancestors to scale.
According to Science Daily:
“analysis has linked today’s hippos to a lineage of anthracotheres,”
In the LRT anthracotheres are pig relatives, not related to hippos.
According to Wikipedia – Hippopotamus
“Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the hippopotamids are cetaceans from which they diverged about 55 million years ago.”
In the LRT eight nodes of desmostylians nest between the hippo clade (Fig 1) and mysticetes (baleen whales). Odontocetes (toothed whales) had a separate ancestry.
Figure 2. Oodectes mandible. Here the groove is the first indication of the evolution of canine honing in hippos.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg?w=584″ class=”size-full wp-image-89719″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg” alt=”Figure 2. Oodectes mandible. Here the groove is the first indication of the evolution of canine honing in hippos.” width=”584″ height=”280″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg?w=584&h=280 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg?w=150&h=72 150w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg?w=300&h=144 300w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/oodectes_herpestoides.mandible588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 2. Oodectes mandible. Here the groove is the first indication of the evolution of canine honing in hippos.
Wikipedia does not include
the list of hippo ancestors recovered by the LRT (Fig 1). So, once again, paleontologists left a phylogenetic vacuum waiting to be filled by someone… anyone… an amateur.
Being in the right place at the right time with a raft of data coming in from the Internet makes it possible for the LRT to test 2325 trait-based taxa. Now it needs a competing study, or two, or three, to test hypothetical interrelationships recovered here.
Corrections continue.
References
wiki/Hippopotamus
Source: https://pterosaurheresies.wordpress.com/2024/11/12/hippos-and-their-ancestors-to-scale/
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