 Homologues of most of the bones of temnospondyls are also seen in other early tetrapods , aside from a few bones in the skull , such as interfrontals , internasals , and interparietals , that have developed in some temnospondyl taxa . Most temnospondyls have tabular horns in the backs of their skulls , rounded projections of bone separated from the rest of the skull by indentations called otic notches ; in some temnospondyls , such as Zatrachys , they are pointed and very prominent . Among the most distinguishing features of temnospondyls are the interpterygoid vacuities , two large holes in the back of the palate . Another pair of holes , choanae , are present in front of these vacuities , and connect the nasal passage with the mouth . Temnospondyls often have teeth on their palates , as well as in their jaws . Some of these teeth are so large , they are referred to as tusks . In some temnospondyls , such as Nigerpeton , tusks in the lower jaw pierce the palate and emerge through openings in the top of the skull . 
 Homologues of most of the bones of temnospondyls are also seen in other early tetrapods , aside from a few bones in the skull , such as interfrontals , internasals , and interparietals , <a href='null_relcl' title='1'><mark>that</mark></a><a href='been_done' title='2'><mark>have</mark></a> developed in some temnospondyl taxa . Most temnospondyls <a href='got' title='3'><mark>have</mark></a> tabular horns in the backs of their skulls , rounded projections of bone separated from the rest of the skull by indentations called otic notches ; in some temnospondyls , such as Zatrachys , they are pointed and very prominent . Among the most distinguishing features of temnospondyls are the interpterygoid vacuities , two large holes in the back of the palate . Another pair of holes , choanae , <a href='drop_aux' title='4'><mark>are</mark></a>present in front of these vacuities , and connect the nasal passage with the mouth . Temnospondyls often <a href='got' title='5'><mark>have</mark></a> teeth on their palates , as well as in their jaws . Some of these teeth are so large , they are referred to as tusks . In some temnospondyls , such as Nigerpeton , tusks in the lower jaw pierce the palate and emerge through openings in the top of the skull . 
Homologues of most of the bones of temnospondyls are also seen in other early tetrapods , aside from a few bones in the skull , such as interfrontals , internasals , and interparietals , done developed in some temnospondyl taxa . Most temnospondyls got tabular horns in the backs of their skulls , rounded projections of bone separated from da rest of the skull by indentations called otic notches ; in some temnospondyls , such as Zatrachys , they are pointed and very prominent . Among the most distinguishing features of temnospondyls are tdainterpterygoid vacuities , 2 large holes in the bacc of thdaalate . Another pair of holes , choanae , present in front of dem vacuities , and connect thedasal passage wit the mouth . Temnospondyls often got teeth on their palates , as well as in their jaws . sum of these teef are soo large , they are referred to as tusks . In ssumtemnospondyls , such as Nigerpeton , tusks in the lower jaw pierce the palate and emerge thru openings in the da of the skull .