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- noun Plural form of
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Furthermore, while the cochleal canal is shorter, and the promontorium is smaller, in basal mammaliaforms than is the case in mammals (Luo et al. 1995), Morganucodon in more mammal-like in these features than are more basal mammaliaforms (like Sinoconodon).
But several studies have shown that basal mammaliaforms were intermediate in these regards, and different from mammals (Rosowski & Graybeal 1991, Graybeal et al. 1998, Luo et al. 1995).
Pam Gill compared the lower jaws of the contemporaneous basal mammaliaforms
And the thing is, that (1) while we know that mammals have pinnae, that doesn’t mean that non-mammalian mammaliaforms did, and (2) it’s well established that basal mammaliaforms like Megazostrodon differed in bony ear anatomy from mammals.
The ossified Meckel’s cartilage and internal groove in Mesozoic mammaliaforms: implications to origin of the definitive mammalian middle ear.
It’s a docodont: a mid-Mesozoic group of mammaliaforms the larger clade of mammals and their closest relatives.