Fig. 28 in Cranial Anatomy Of Kryptobaatar Dashzevegi (Mammalia, Multituberculata), And Its Bearing On The Evolution Of Mammalian Characters

Fig. 28. The floor of the endocranium of the platypus Ornithorhynchus anatinus in dorsal view (modified from Zeller, 1989: fig. 6, with the author's permission). Parallel lines represent the cut edge of the braincase. Abbreviations: al anterior lamina; bo basioccipital; fV2 foramen for maxillary nerve fV3 foramen for mandibular nerve; hf hypophyseal fossa; iam internal acoustic meatus; jfo 1 hyf confluent jugular and hypoglossal foramina; jsp jugum sphenoidale; mlcp middle clinoid process (ossified remnant of pila antotica); onsf orbitonasal foramen; pet petrosal; pp pila preoptica; prc prootic canal; psf pseudoptic foramen (for II, III, IV, V1, VI); ptc posttemporal canal; sf subarcuate fossa; sq squamosal; tus tuberculum sellae; vaq vestibular aqueduct.