Quiroga J C
Z Mikrosk Anat Forsch. 1980;94(4):580-92.
Endocranial casts of the cynodonts Andescynodon mendozensis, Probelesoden sp., Massetognathus pascualis and M. teruggii are studied qualitatively and quantitatively. The former two show large and flat olfactory bulbs, little or no representation of the olfactory peduncles, long and narrow cerebral region and laterally protruding flocculus at the cerebellar region, specially developed in Andescynodon. The specimens of Massetognathus show long, narrow and elevated olfactory bulbs, well represented olfactory peduncles, wide cerebral region (specially in M. pascuali) and pineal foramen (specially developed in M. teruggii). The encephalization quotients are in agreement with previous results on cynodont endocasts. One specimen of Andescynodon shows a range of 0.097-0.15 and Massetognathus pascuali 0.12-0.18.
对犬齿兽类的门多萨安氏犬齿兽（Andescynodon mendozensis）、原前颌兽属（Probelesoden sp.）、帕斯夸马塞托兽（Massetognathus pascualis）和特鲁吉马塞托兽（M. teruggii）的颅内模型进行了定性和定量研究。前两者显示出大而扁平的嗅球，嗅束的显示很少或没有，脑区狭长，小脑区域有向外侧突出的绒球，在安氏犬齿兽中尤为发达。马塞托兽的标本显示出长而窄且隆起的嗅球，嗅束显示良好，脑区宽阔（特别是在帕斯夸马塞托兽中）以及松果孔（在特鲁吉马塞托兽中特别发达）。脑化商与先前关于犬齿兽颅内模型的结果一致。一个安氏犬齿兽标本的脑化商范围为0.097 - 0.15，帕斯夸马塞托兽为0.12 - 0.18。
