
sphenacodontia

sphenacodontia vyutpann synapsid kaa ack tanaa-adharit vansh haye. ise amson aur laurin (2011) dwara "sabse badey vansh key roop mein paribhaashit kiya gayaa thaa jisamen" haptodus bellie "," haptodus garnatensis "aur" sphenakodan ferrox "shamil hain, lekin" adaphosaurus pagonias "naheen. way pahali baar pensylvanian (oopari carboniferous) yug key anta mein dikhaai dete hain. carboniferous key anta seey laker permian key anta taka, unamen seey adhikansh badey baney rahey, kewal kuchh hii aakar mein chhote hoe gaye.
besal sphenacodontia praarambhik pelicosors seey paitrik therapids (joe badale mein adhik unnat roopon aur anta mein standhaariyon key poorvaj they) taka ack sankramankalin vikaasvaadi shrinkhala kaa gathan kartaa haye. koee yeh kaha sakata haye kii sphenacodontians proto-therapids hain (bhale hii anya sphenacodontians seey therapids key poorvajon key alag honey aur jeevaashm record mein therapids kii pahali upasthiti key beach lagbhag 30 million saal kaa antar haye).
visheshataaen.
paribhaashit visheshtaon mein isaki aantarik satah parr dikhaai dene vaale maxilla kaa motaa honah, badey saamane (caniform) daanton key oopar; aur premaxillary daanton koo gahare saaket mein sthaapit kiya jaanaa shamil haye. anya sabhi (bahan samooh aur adhik adim) synapsid clads key daant uthale saaket mein sthaapit hotey hain.
vargeekaran.
nimnalikhit vargeekaran fröbisch "et al kaa anusaran kartaa haye."(2011), benson (2012) aur spinder (2016) jaba taka kii anyatha ullekh naheen kiya gayaa hoe.
varg synapsida