Today several Insectivores (clade within the Mammalia)
and other taxa are added to the large reptile tree (now 744 taxa). And, no surprise, the little fur-balls nest together (subset Fig. 1). Talpa is a mole. Scutisorex is a shrew. Solenodon is, well, a solenodon!
As you can see,
Tenrecs are no longer insectivores. Insectivores are sisters to Solenodon and that clade is a sister to the rodents + Rugosodon (Jurassic, Yuan et al. 2013), a multiuberculate mammal. Rugosodon is the oldest multituberculate so far described, so it should be one of the least derived. They have flexible ankles, according to Wikipedia.
Wikipedia reports, “Multituberculates are extinct rodent-like mammals usually placed outside either of the two main groups of living mammals—Theria, including placentals and marsupials, and Monotremata—but closer to Theria than to monotremes. (references on that page). Sorry to report this, but after testing in the large reptile tree, multituberculates appear to be rodent-like because they are rodent sisters. If you have any suggestions for taxa that might attract Rugosodon away from rodents, toward the base of the Mammalia, please pass them on.
If you want to check my work
I’ll have images and pages set up at ReptileEvolution.com after the upcoming weekend. Otherwise, nearly all the images I used for data were Googled. So you can find the same data online.