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Corrections: 1. Zanycteris, 2. Conoryctes and 3. Glironia

Saturday, September 7, 2024 20:00

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Should have seen these earlier.
Still glad the LRT pointed these out, no matter how long it took.

Figure x. Zanycteris now nests with the much larger earlier Zalambdalestes, from the Late Cretaceous of Mongolia. ” data-image-caption=”

Figure x. Zanycteris now nests with the much larger earlier Zalambdalestes, from the Late Cretaceous of Mongolia.

” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/05/zalambdalestes-10.jpg?w=270″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/05/zalambdalestes-10.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-88638″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/05/zalambdalestes-10.jpg” alt=”Figure x. Zanycteris now nests with the much larger earlier Zalambdalestes, from the Late Cretaceous of Mongolia.” width=”584″ height=”650″ />

Figure 1. Zanycteris now nests with the much larger earlier Zalambdalestes, from the Late Cretaceous of Mongolia.

1. The tiniest tested mammal,
Early Palaeocene Zanycteris (Figs 1, 2, AMNH 17180) from Colorado now nest with Late Cretaceous Zalambdalestes from Mongolia.

Figure 1b. Zanyctheris skull in 3 views, revised DGS colors. Compare to Zalambdalestes in figure 1. ” data-image-caption=”

Figure 1b. Zanyctheris skull in 3 views, revised DGS colors. Compare to Zalambdalestes in figure 1.

” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/zanycteris_skull3views588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/zanycteris_skull3views588.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-88648″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/zanycteris_skull3views588.jpg” alt=”Figure 1b. Zanyctheris skull in 3 views, revised DGS colors. Compare to Zalambdalestes in figure 1. ” width=”584″ height=”509″ />

Figure 1b. Zanyctheris skull in 3 views, revised DGS colors. Compare to Zalambdalestes in figure 1.

2. Conoryctes is now a creodont marsupial.
According to Wikipedia, “Conoryctidae is an extinct family of mammals from extinct order Taeniodonta, that lived in North America and Europe from the early Paleocene to early Eocene.” In the LRT Conoryctes nested among the basal hoofed animals, based on its skull alone. New comparisons with the creodont marsupial Pterodon (Fig 2) are informative.

Figure 2. Conoryctes now nests with Pterodon = Hyainalouros. ” data-image-caption=”

Figure 2. Conoryctes now nests with Pterodon = Hyainalouros.

” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/pterodon-hyainailouros-conoryctes588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/pterodon-hyainailouros-conoryctes588.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-88653″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/pterodon-hyainailouros-conoryctes588.jpg” alt=”Figure 2. Conoryctes now nests with Pterodon = Hyainalouros. ” width=”584″ height=”509″ />

Figure 2. Conoryctes now nests with Pterodon = Hyainalouros. Missing parts restored with DGS colors.

3. Glironia must be missing a canine.
Earlier it appeared the fifth incisor was an incisor-shaped canine because it appeared to arise from the anterior maxilla. It still does (Fig 3). Now, with comparison to a new sister, Dromiciops (Fig 3), five incisors could be present and canines were absent.

Figure 2. Above: Dromiciops skull and tooth row (right rotated). Below: Glironia skull and tooth row (right, rotated). ” data-image-caption=”

Figure 2. Above: Dromiciops skull and tooth row (right rotated). Below: Glironia skull and tooth row (right, rotated).

” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-2.jpg?w=163″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-2.jpg?w=558″ tabindex=”0″ role=”button” class=”size-full wp-image-88629″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-2.jpg” alt=”Figure 2. Above: Dromiciops skull and tooth row (right rotated). Below: Glironia skull and tooth row (right, rotated).” width=”584″ height=”1073″ />

Figure 3. Above: Dromiciops skull and tooth row (right rotated). Below: Glironia skull and tooth row (right, rotated).

Every little correction, like these
(Figs 1–3) serves to bring the mammal subset of the LRT closer to full resolution. It’s not there yet, but perhaps soon.

References

SVP abstracts 12: Conoryctes, still not a taeniodont

The bushy-tailed opossum, Glironia, has odd teeth

Zanycteris, one of the tiniest mammals of all time, goes under µCT scanning

Source: https://pterosaurheresies.wordpress.com/2024/09/08/corrections-1-zanycteris-2-conoryctes-and-3-glironia/

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