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Albertaceratops nesmoi

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Journal Article

A NEW BASAL CENTROSAURINE CERATOPSID FROM THE OLDMAN FORMATION, SOUTHEASTERN ALBERTA Available to Purchase

MICHAEL J. RYAN
Published: 01 March 2007
Journal of Paleontology (2007) 81 (2): 376–396.
DOI: https://doi.org/10.1666/0022-3360(2007)81[376:ANBCCF]2.0.CO;2
...MICHAEL J. RYAN Abstract A new centrosaurine ceratopsid, Albertaceratops nesmoi , is described from the lower Oldman Formation (Upper Cretaceous) of southern Alberta, and is based on a single, almost complete skull. Referred material is described from equivalent beds in the Judith River Formation...
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View PDF for article title, A NEW BASAL CENTROSAURINE CERATOPSID FROM THE OLDMAN FORMATION, SOUTHEASTERN ALBERTA
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Figure8—Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, medial, and 2, lateral right dentary; 3, predentary in left lateral view. BCP, base of coronoid process; PDC, predentary contact. Scale bar = 10 cm

Figure 8 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, me... Available to Purchase

Published: 01 March 2007
Figure 8 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, medial, and 2, lateral right dentary; 3, predentary in left lateral view. BCP, base of coronoid process; PDC, predentary contact. Scale bar = 10 cm
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Figure6—Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Dorsal, and, 2, ventral view of right squamosal. ES, suture for epoccipital that straddles the parietal-squamosal contact; PC, parietal contact; POC, contact for postorbital; QG, quadrate groove; SM, margin of supratemporal fenestra. Scale bar = 10 cm

Figure 6 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Do... Available to Purchase

Published: 01 March 2007
Figure 6 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Dorsal, and, 2, ventral view of right squamosal. ES, suture for epoccipital that straddles the parietal-squamosal contact; PC, parietal contact; POC, contact for postorbital; QG, quadrate groove; SM, margin of supratemporal
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Comparison of frill ornamentations of (1) Albertaceratops nesmoi in Ryan (2007), (2) previous reconstruction of Medusaceratops lokii frill in Ryan et al. (2010) (gray part represents where the holotype [WDC-DJR-001] corresponds), and (3) new reconstruction of M. lokii frill in this study, mainly based on ROM 73832, ROM 73836, and WDC-DJR-001. Abbreviation: ep, epiparietal.

Comparison of frill ornamentations of ( 1 ) Albertaceratops nesmoi in Rya... Available to Purchase

Published: 28 November 2017
Figure 4 Comparison of frill ornamentations of ( 1 ) Albertaceratops nesmoi in Ryan ( 2007 ), ( 2 ) previous reconstruction of Medusaceratops lokii frill in Ryan et al. ( 2010 ) (gray part represents where the holotype [WDC-DJR-001] corresponds), and ( 3 ) new reconstruction of M . lokii
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Figure3—Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1 holotype from the lower Oldman Formation of Alberta. 1, Left lateral; 2, line drawing of skull. Portions of the postorbital-squamosal and jugal-squamosal sutures are obscured by breakage due to crushing. BS, basisphenoid; EJC, epijugal contact; ES, suture for epoccipital that straddles the parietal-squamosal contact; IOF, infraorbital foramen; J, jugal; L, lacrimal; N, nasal; O, orbit; PAL, palpebral; PO, postorbital; POH, postorbital orbital horncore; PR, midline parietal ramus; P3–7, parietal processes #3–7; PAL, palpebral; PB, parietal ramus; Q, quadrate; QJ, quadratojugal; S, squamosal. Scale bar = 20 cm

Figure 3 — Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1 ho... Available to Purchase

Published: 01 March 2007
Figure 3 — Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1 holotype from the lower Oldman Formation of Alberta. 1, Left lateral; 2, line drawing of skull. Portions of the postorbital-squamosal and jugal-squamosal sutures are obscured by breakage due to crushing. BS, basisphenoid
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Figure4—Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1. 1, Holotype, left nasal; 2, lateral view of right premaxilla and medial view of caudal left premaxilla. Dashed line in 2 indicates the preserved extent of the right premaxilla. 3, Lateral, and 4, medial views of left maxilla. 5, Dorsal view of right jugal; 6, epijugal in lateral view. AM, alveolar margin; AR, ascending ramus; EJC, epijugal contact; JC, jugal contact; LC, lacrimal contact; LPMX, left premaxilla; MXC, contact for the maxilla; NORN, height of nasal ornamentation; OM, margin of orbit; PMXC, contact for premaxilla; PT, contact for palatine; RPMX, right premaxilla. Scale bars = 10 cm

Figure 4 — Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1. ... Available to Purchase

Published: 01 March 2007
Figure 4 — Albertaceratops nesmoi n. gen. and sp. Skull, TMP 2001.26.1. 1, Holotype, left nasal; 2, lateral view of right premaxilla and medial view of caudal left premaxilla. Dashed line in 2 indicates the preserved extent of the right premaxilla. 3, Lateral, and 4, medial views
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Figure5—Albertaceratops nesmoi n. gen. and sp., nasals. 1, Left lateral and, 2, dorsal views of WDCB-MC-002; 3, lateral, 4, medial right nasal TMP 2002.3.37; 5, lateral, 6, dorsal, 7, medial left nasal, TMP 2002.3.32; 8, lateral, 9, medial left nasal TMP 2002.3.31. All photographs are of the original specimens, but the catalogued nasals 3–9 are casts. INO, internal base of nasal ornamentation; NAR, nares; NORN, nasal ornamentation; NP, narial process; PF?, prefrontal? Scale bar = 10 cm

Figure 5 — Albertaceratops nesmoi n. gen. and sp., nasals. 1, Left late... Available to Purchase

Published: 01 March 2007
Figure 5 — Albertaceratops nesmoi n. gen. and sp., nasals. 1, Left lateral and, 2, dorsal views of WDCB-MC-002; 3, lateral, 4, medial right nasal TMP 2002.3.37; 5, lateral, 6, dorsal, 7, medial left nasal, TMP 2002.3.32; 8, lateral, 9, medial left nasal TMP 2002.3.31. All
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Figure7—Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Dorsal view of parietal. Midline ramus has been mediolaterally crushed. Left ramus is crushed under the midline ramus. Right ramus is broken medial to the base of P3 and has been rotated clockwise under the break; 2, outline drawing of reconstructed parietal. P3 processes are based on the shape of parietals from the Montanan bone bed; 3, ventral view of left parietal ramus. P3–7, parietal processes #3–7. Scale bar = 10 cm

Figure 7 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Do... Available to Purchase

Published: 01 March 2007
Figure 7 — Albertaceratops nesmoi n. gen. and sp., TMP 2001.26.1. 1, Dorsal view of parietal. Midline ramus has been mediolaterally crushed. Left ramus is crushed under the midline ramus. Right ramus is broken medial to the base of P3 and has been rotated clockwise under the break; 2, outline
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Figure9—Albertaceratops nesmoi n. gen. and sp. WDCB-MC-001 skull in 1, dorsal, 2, right lateral, and 3, rostral views. FF, frontal fontanelle; N, nasal; NO, narial opening; O, orbit; OHC, orbital horncore; PAL, palpebral; PO, postorbital; RB, rostral bar of premaxilla; SCC, supracranial cavity; SOP, supraorbital pitting. Scale bar = 10 cm

Figure 9 — Albertaceratops nesmoi n. gen. and sp. WDCB-MC-001 skull in 1... Available to Purchase

Published: 01 March 2007
Figure 9 — Albertaceratops nesmoi n. gen. and sp. WDCB-MC-001 skull in 1, dorsal, 2, right lateral, and 3, rostral views. FF, frontal fontanelle; N, nasal; NO, narial opening; O, orbit; OHC, orbital horncore; PAL, palpebral; PO, postorbital; RB, rostral bar of premaxilla; SCC, supracranial
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Figure10—Albertaceratops nesmoi n. gen. and sp. 1, Dorsal left jugal, TMP 2002.3.33; 2, lateral, 3, medial left squamosal, TMP 2002.3.30; 4, lateral, 5, rostral view of right juvenile-sized postorbital horncore, TMP 2002.69.10; 6, dorsal left postorbital horncore, TMP 2002.3.36; 7, medial right dentary, TMP 2002.69.8. All photographs are of the original specimens, but all catalogued specimens except 4, 5, and 7 are casts. CP, coronoid process; EJC, epijugal contact; IOFM, margin of infraorbital fenestra; O, orbit; PALS, parietal suture; PS, parietal suture; QG, quadrate groove. Scale bars = 10 cm

Figure 10 — Albertaceratops nesmoi n. gen. and sp. 1, Dorsal left jugal... Available to Purchase

Published: 01 March 2007
Figure 10 — Albertaceratops nesmoi n. gen. and sp. 1, Dorsal left jugal, TMP 2002.3.33; 2, lateral, 3, medial left squamosal, TMP 2002.3.30; 4, lateral, 5, rostral view of right juvenile-sized postorbital horncore, TMP 2002.69.10; 6, dorsal left postorbital horncore, TMP 2002.3.36; 7
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Figure11—Albertaceratops nesmoi n. gen. and sp., parietals. 1, Dorsal, 2, ventral right parietal ramus, TMP 2002.03.38; 3, ventral, 4, dorsal left parietal process P3, TMP 2002.03.38. All photographs are of the original specimens, but the catalogued parietals are casts. P3–5, parietal processes #3–5; SQC, squamosal contact. Scale bar = 10 cm

Figure 11 — Albertaceratops nesmoi n. gen. and sp., parietals. 1, Dorsa... Available to Purchase

Published: 01 March 2007
Figure 11 — Albertaceratops nesmoi n. gen. and sp., parietals. 1, Dorsal, 2, ventral right parietal ramus, TMP 2002.03.38; 3, ventral, 4, dorsal left parietal process P3, TMP 2002.03.38. All photographs are of the original specimens, but the catalogued parietals are casts. P3–5, parietal
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Fig. 7.

Reconstructions of Centrosaurinae parietals. (A) Xenoceratops foremostensi... Available to Purchase

Published: 08 November 2012
Fig. 7. Reconstructions of Centrosaurinae parietals. (A) Xenoceratops foremostensis ; (B) Centrosaurus apertus ; (C) Styracosaurus albertensis ; (D) Achelousaurus horneri ; (E) Albertaceratops nesmoi ; (F) Pachyrhinosaurus lakustai ; (G) Einiosaurus procurvicornus ; (H) Diabloceratops
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(A) Panorama of Wendy’s Bonebed (WBB) field locality looking NNE with the Milk River at the left. WBB is marked with a vertical arrow; horizontal arrowheads mark the limit of the excavation. White line indicates the top of the Taber Coal Zone (TCZ). WBB sits approximately 18 m above the TCZ. AQ indicates holotype quarry of Albertaceratops nesmoi approximately 450 m from WBB, approximately 8 m above the top of the TCZ. (B) Enlargement of black box (partially obscured by hillside) in Fig. 3A showing the extent of the Foremost (F Fm) and Oldman (O Fm) formations, and the Taber Coal Zone (TCZ) below AQ. (C) WBB in 2005 prior to excavation. White arrowheads bound the bone layer at the base of an approximately 1 m thick dark argillaceous sandstone (see Fig. 1 for bonebed section). (D) Inset of black box in Fig. 3C showing limb element (LE) in situ at the top of the bone layer with lower boundary indicated by white arrowheads. [Colour online.]

(A) Panorama of Wendy’s Bonebed (WBB) field locality looking NNE with the M... Available to Purchase

Published: 29 March 2022
the TCZ. AQ indicates holotype quarry of Albertaceratops nesmoi approximately 450 m from WBB, approximately 8 m above the top of the TCZ. (B) Enlargement of black box (partially obscured by hillside) in Fig. 3A showing the extent of the Foremost (F Fm) and Oldman (O Fm) formations, and the Taber Coal
Journal Article

A new ceratopsid from the Foremost Formation (middle Campanian) of Alberta Available to Purchase

Michael J. Ryan, David C. Evans, Kieran M. Shepherd
Published: 08 November 2012
Canadian Journal of Earth Sciences (2012) 49 (10): 1251–1262.
DOI: https://doi.org/10.1139/e2012-056
...Fig. 7. Reconstructions of Centrosaurinae parietals. (A) Xenoceratops foremostensis ; (B) Centrosaurus apertus ; (C) Styracosaurus albertensis ; (D) Achelousaurus horneri ; (E) Albertaceratops nesmoi ; (F) Pachyrhinosaurus lakustai ; (G) Einiosaurus procurvicornus ; (H) Diabloceratops...
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New material and systematic re-evaluation of Medusaceratops lokii (Dinosauria, Ceratopsidae) from the Judith River Formation (Campanian, Montana) Available to Purchase

Kentaro Chiba, Michael J. Ryan, Federico Fanti, Mark A. Loewen, David C. Evans
Published: 28 November 2017
Journal of Paleontology (2018) 92 (2): 272–288.
DOI: https://doi.org/10.1017/jpa.2017.62
...Figure 4 Comparison of frill ornamentations of ( 1 ) Albertaceratops nesmoi in Ryan ( 2007 ), ( 2 ) previous reconstruction of Medusaceratops lokii frill in Ryan et al. ( 2010 ) (gray part represents where the holotype [WDC-DJR-001] corresponds), and ( 3 ) new reconstruction of M . lokii...
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View PDF for article title, New material and systematic re-evaluation of Medusaceratops lokii (Dinosauria, Ceratopsidae) from the Judith River Formation (Campanian, Montana)
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Taphonomy of a monodominant Gryposaurus sp. bonebed from the Oldman Formation (Campanian) of Alberta, Canada Available to Purchase

Evan E. Scott, Kentaro Chiba, Federico Fanti, Beverly Z. Saylor, David C. Evans, Michael J. Ryan
Published: 29 March 2022
Canadian Journal of Earth Sciences (2022) 59 (6): 389–405.
DOI: https://doi.org/10.1139/cjes-2020-0200
... the TCZ. AQ indicates holotype quarry of Albertaceratops nesmoi approximately 450 m from WBB, approximately 8 m above the top of the TCZ. (B) Enlargement of black box (partially obscured by hillside) in Fig. 3A showing the extent of the Foremost (F Fm) and Oldman (O Fm) formations, and the Taber Coal...
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View PDF for article title, Taphonomy of a monodominant Gryposaurus sp. bonebed from the Oldman Formation (Campanian) of Alberta, Canada
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