Maiopatagium: perhaps another case of taxon exclusion

Meng et al. 2017 bring us
a new gliding mammaliaform (pre-mammal) from the Jurassic (160 mya) of China, Maiopatagium furculiferum (BMNH 2940, Figs. 1,2).

Unfortunately
it does not look like any pre-mammals tested here.

Figure 1. Maiopatagium in situ in white and UV light. The X marks an area surrounded by fur lacking proptagial data. Is the propatagium wishful thinking?

Figure 1. Maiopatagium in situ in white and UV light. The X marks an area surrounded by fur lacking proptagial data. Is the propatagium wishful thinking?

Meng et al nest Maiopatagium
between Sinoconodon and Haldanodon, taxa more primitive than mammals. By contrast the large reptile tree (LRT, 1044 taxa) nests Maiopatagium between the interatheres, Interatherium + Paedotherium and the former enigma taxa Groeberia + Vintana, all  marsupials, not Haramyidae, contra Meng et al. 2017, who do not appear to have tested against all ;possible candidate taxa.

Figure 2. Maiopatagium imagery from Meng et al. 2017, plus reconstruction of the extended manus and pes and some bones colorized.

Figure 2. Maiopatagium imagery from Meng et al. 2017, plus reconstruction of the extended manus and pes and some bones colorized. The purported gliding membrane may instead simply be loose skin. Pink area between fingers perhaps falsely adds gliding membrane.

There is another newly described and similar taxon,
Vilevolodon that I need to look at before proceeding further. I’ll have more to say about both taxa later. 

References
Meng Q-J, Grossnickle DM, Liu D, Zhang Y-G, Neander AI, Ji Q and Luo Z-X 2017.
New gliding mammaliaforms from the Jurassic. Nature (advance online publication)
doi:10.1038/nature23476

wiki/Maiopatagium

 

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