erratum in Re: LATE SURVIVING CYNODONT (

[Pieter.Depuydt@rug.ac.be]

Please replace 'Theropsids' by Reptilia (slip of the pen, will never 
mail again late in the evening). 

> Very right. The stapes we mammals inherited from our pre-Synapsid amniote 
> ancestor since this small bone is also present in extant Theropsids, 
> lizards and birds. Articular became malleus, quadrate became incus, 
> and the other postdentary bone, the  angular with its reflected lamina became 
> the tympanic bone, which holds the eardrum.
> According to a theory advocated by Allin, the intermediate cynodont 
> status with its already reduced postdentary bones already played some 
> role in conducting sounds from the eardrum (behind the squamosal) to 
> the fenestra ovalis in the braincase (one problem with this theory: 
> the high inertia of this intermediate structures only allowed 
> conduction of very low frequency sounds).