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petrosals

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Journal Article
Published: 01 September 1983
Journal of Paleontology (1983) 57 (5): 1040–1046.
...Donald R. Prothero Abstract Two fragmentary mammalian petrosals were collected in 1968 and 1969 from the Upper Jurassic Morrison Formation, Bone Cabin Draw, Wyoming, and from the Early Cretaceous Kelvin Formation near Coalville, Utah. The Morrison petrosal (AMNH 104830) came from a mammal...
Journal Article
Published: 01 January 2012
Journal of Paleontology (2012) 86 (1): 44–50.
...Maureen A. O'Leary; Biren A. Patel; Mark N. Coleman Abstract We provide the first detailed endocranial description of the petrosal bone of the ear region of the anthracotheriid artiodactyl Bothriogenys, based on two new specimens from the early Oligocene of the Jebel Qatrani Formation, Fayum, Egypt...
FIGURES | View All (5)
Journal Article
Published: 01 May 1982
Journal of Paleontology (1982) 56 (3): 795–805.
Journal Article
Published: 01 November 1996
Journal of Paleontology (1996) 70 (6): 1045–1066.
Journal Article
Published: 01 September 2020
Journal of Paleontology (2020) 94 (5): 979–1006.
... into the middle ear cavity, with the facial nerve exiting through a stylomastoid foramen primitivum; and (4) unexpanded caudal and rostral tympanic processes of the petrosal. The absence of any preserved bullar elements in the middle ear contrasts with that of other plesiadapiforms for which the region has been...
FIGURES | View All (20)
Image
Comparisons of the relative shape of the <b>petrosal</b> bone of the ear in terres...
Published: 01 January 2012
F igure 4 Comparisons of the relative shape of the petrosal bone of the ear in terrestrial, aquatic and semiaquatic artiodactyls. 1 , 2 , CT scans of left ear region in coronal view: 1 , Hippopotamus amphibius (AMNH 53769); 2 , the anthracotheriid Bothriogenys cf. gorringei (DPC 5248
Image
Skull of holotype AMNH FM 13142 of hyaenodontid  Sinopa lania  Matthew,  19...
Published: 01 August 2021
in inferior view; ( 4, 5 ), right dentary in lateral ( 4 ) and superior ( 5 ; inverted) views. Same 20 mm scale applies to Figure 10.3–10.5 . Abbreviations: bo, basioccipital; ctp, caudal tympanic process of the petrosal; eo, exoccipital; fc, fenestra cochleae; fsm, stylomastoid foramen; fv, fenestra
Image
CT data for comparative sample. Relative <b>petrosal</b> density is not reported f...
Published: 01 January 2012
T able 1 CT data for comparative sample. Relative petrosal density is not reported for extinct taxa (n/a) because they are lithified making a comparison to bone unreliable. Volume of the tegmen tympani alone is standardized against volume of the petrosal, excluding the mastoid region, which can
Image
Natural endocast and cranial fragments of  Microsyops annectens  (UW 14559)...
Published: 01 September 2020
) left lateral views. Asterisk in ( 3 ) is on the bone of the endocranial surface of the right petrosal, for orientation. Left petrosal/squamosal fragment in ( 4 ) ventral; and ( 5 ) endocranial views; “pr” in ( 4 ) indicates the promontorium. Scale bars represent 5 mm.
Image
CT-based comparisons of relative <b>petrosal</b> density and volume.  1 , bones un...
Published: 01 January 2012
F igure 5 CT-based comparisons of relative petrosal density and volume. 1 , bones under comparison; and 2 , relative density (i.e., radiological density) of the petrosal compared to a standard reference (basioccipital bone) in one individual each of 15 species: of aquatic taxa (Delphinus
Image
Oblique view of the left side of the basicranium of  Microsyops annectens  ...
Published: 01 September 2020
tympanic process of the petrosal. Scale bar represents 5 mm. Abbreviations: acf = anterior carotid foramen; ap = tympanic process of the alisphenoid; as = alisphenoid; at = auditory tube; bo = basioccipital; bs = basisphenoid; bstp = basisphenoid tympanic process; cc = cochlear canaliculus; eg
Image
Microsyops annectens  (UW 12362). ( 1 ) Photograph of the cranium lightly d...
Published: 01 September 2020
carotid artery and promontorial and stapedial branches. The asterisks indicate the very small caudal tympanic process of the petrosal. Scale bar represents 5 mm. Abbreviations: acf = anterior carotid foramen; as = alisphenoid; bo = basioccipital; bs = basisphenoid; bstp = basisphenoid tympanic process; cr
Image
Figure  5. Sample CT-scans of  Remingtonocetus harudiensis  (IITR 2770):  1...
Published: 01 July 2011
1 . Abbreviations: Cri pl = Cribriform plate; Dor pet fis = dorsal petrosal fissure; Inv = involucrum; Lat rec = lateral recess of nasopharyngeal duct; Nas cav = nasal cavity; Max sin = Maxillary sinus; Mid ear,middle ear cavity; Nuc sh = Nuchal shield; Occ = occipital; Olf bul = Olfactory bulb
Journal Article
Published: 01 July 2011
Journal of Paleontology (2011) 85 (4): 703–718.
... 1 . Abbreviations: Cri pl = Cribriform plate; Dor pet fis = dorsal petrosal fissure; Inv = involucrum; Lat rec = lateral recess of nasopharyngeal duct; Nas cav = nasal cavity; Max sin = Maxillary sinus; Mid ear,middle ear cavity; Nuc sh = Nuchal shield; Occ = occipital; Olf bul = Olfactory bulb...
FIGURES | View All (7)
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Labeled ventral view of  Microsyops annectens  (UW 12362), lightly dusted w...
Published: 01 September 2020
rotundum; gf = glaserian fissure; glf = glenoid fossa; hf = hypoglossal foramen; if = incisive foramen; ips = inferior petrosal sinus; ju = jugal; ma = mastoid; mx = maxilla; oc = occipital; occ = occipital condyle; os = orbitosphenoid; pal = palatine; pet = petrosal; pgf = postglenoid foramen; pgp
Image
New fossil anthracotheriid skull (DPC 5248) in  1 , dorsal; and  2 , ventra...
Published: 01 January 2012
F igure 2 New fossil anthracotheriid skull (DPC 5248) in 1 , dorsal; and 2 , ventral views, referred to Bothriogenys cf. gorringei Andrews and Beadnell, 1902 . The petrosal is visible through the dorsal aspect of the skull where the calvarium is broken. Other images of this skull
Series: Contributions to Geology
Published: 01 January 1988
DOI: 10.2113/gsrocky.26.special_paper_4.1
EISBN: 9780989762632
... defined fossa muscularis minor in Lambdopsalis suggest that Lambdopsalis (possibly a burrower) adapted to low-frequency perception. Lambdopsalis possesses a large alisphenoid (perforated by the trigeminal foramina) and a slender “anterior lamina of the petrosal.” The discovery supports Presley’s...
Series: Contributions to Geology
Published: 01 January 1988
DOI: 10.2113/gsrocky.26.special_paper_4.1
EISBN: 9780989762632
Image
Figure  3 . Photographs (left) and interpretive drawings (right) of the rig...
Published: 01 March 2011
Figure 3 . Photographs (left) and interpretive drawings (right) of the right petrosal of USNM 487920, holotype of Galecyon chronius n. sp. in: 1, ventral view; 2, dorsal view. Abbreviations: fr  =  fenestra rotunda; iam  =  internal acoustic meatus; mp  =  mastoid process; mt  =  mastoid
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Khroma's endocranial space, segmented from the Le Puy scan and represented ...
Published: 01 July 2014
toward the posterior, to intersect the petrosals (well-ossified bones [bright white] within the basicranial complex). Maximum transverse width of endocast is 225 mm, maximum dorsoventral depth is 118 mm, and maximum anteroposterior length is 205 mm.