Early Cretaceous Sinobaatar: another Mesozoic aye-aye
Earlier misunderstandings are cleared up here
by reidentifying certain of the crushed elements in the skull of Early Cretaceous Sinobaatar (Fig 1, Hu and Wang 2002) a traditional multituberculate.
Figure 1. Sinobaatar skull revisited, now with a postorbital bar created by a broken jugual.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg?w=584″ class=”size-full wp-image-91786″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg” alt=”Figure 1. Sinobaatar skull revisited, now with a postorbital bar created by a broken jugual. ” width=”584″ height=”557″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg?w=584&h=557 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg?w=150&h=143 150w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg?w=300&h=286 300w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/sinobaatar-skullctscan588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Sinobaatar skull revisited, now with a postorbital bar created by a broken jugal. DGS colors added here.
Never far from the multis in the LRT,
the extant aye-aye, Daubentonia (Fig 1) and Middle Jurassic Megaconus (Fig 2), now nest with Sinobaatar in the large reptile tree (LRT, 2337 taxa).
Figure 2. Daubentonia, the aye-aye is a living Sinobaatar.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg?w=192″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg?w=584″ class=”size-full wp-image-91787″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg” alt=”Figure 2. Daubentonia, the aye-aye is a living Sinobaatar. ” width=”584″ height=”913″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg?w=584&h=913 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg?w=96&h=150 96w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg?w=192&h=300 192w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/02/daubentonia-skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 2. Daubentonia, the aye-aye is a living Sinobaatar.
Sinobaatar lingyuanensis
(Hu and Wang 2002, Early Cretaceous, rat-sized) is a small multituberculate close to Rugosodon. Several specimens are known. One jaw is inside the belly of a theropod.
Figure 1. Sinobaatar in situ. DGS colors and reconstuctions added here.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg?w=211″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg?w=584″ class=”size-full wp-image-85601″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg” alt=”Figure 1. Sinobaatar in situ. DGS colors and reconstuctions added here.” width=”584″ height=”830″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg?w=584&h=830 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg?w=106&h=150 106w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg?w=211&h=300 211w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/04/sinobaatar_insitu588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 3. Sinobaatar in situ. DGS colors and reconstuctions added here. The old skull reconstruction is shown here.
Siinobaatar is known from
a plate preserving the limbs, but missing the torso (Fig 3). In this view the palate is visible.
References
Hu Y Wang YQ 2002. Sinobaatar gen nov: First multituberculate from the Jehol Biota of Liaoning, Northeast China. Chinese Science Bulletin 47(11): 933–938.
Source: https://pterosaurheresies.wordpress.com/2025/02/20/early-cretaceous-sinobaatar-another-mesozoic-aye-aye/
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