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Brachydontes

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Journal Article
Published: 01 July 2021
Journal of Paleontology (2021) 95 (4): 861–885.
... of the deciduous and permanent dentition of Interatherium and Protypotherium (Interatheriinae) is presented, based mainly on unpublished materials. Deciduous cheek teeth are brachydont and placed covering the apex of the respective permanent tooth; in addition, some morphological and metrical differences...
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First thumbnail for: Deciduous dentition and dental eruption sequence i...
Second thumbnail for: Deciduous dentition and dental eruption sequence i...
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Details of disarticulated shell beds forming reworked lags within facies A mudstone. A. Two species of Corbula; B. Lag comprising mainly disarticulated oysters and Brachydontes cf. multilinigera Meek (McLearn, 1945); (scale marked in 1 cm divisions). C. Large oysters, possibly Ostrea soleniscus Meek (Stanton, 1893); D. Detail of internal surface of oyster shell showing encrusting serpulid worm tubes (coin = 18 mm diameter). Allomember A, Flatbed Creek.
Published: 01 June 2019
Figure 8. Details of disarticulated shell beds forming reworked lags within facies A mudstone. A. Two species of Corbula ; B. Lag comprising mainly disarticulated oysters and Brachydontes cf. multilinigera Meek ( McLearn, 1945 ); (scale marked in 1 cm divisions). C. Large oysters, possibly
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Comparing functional occlusal traits (EDBI in A, ET in B) of extant Phacochoerus africanus, Pleistocene Potamochoerus sp., and Plio-Pleistocene Metridiochoerus (Supplementary Table 7); Potamochoerus sp. is characterized by a generalized suid dentition (short and brachydont M3s), compared with dedicated grass eaters with specialized dentition such as Phacochoerus and Metridiochoerus; gray diamonds represent results of Phacochoerus africanus (Pha. af.); black filled circles represent results of Potamochoerus sp. (Pota. sp.); colored shades represent the confidence limits of the results of Metridiochoerus (Met.), as shown in Figs. 4 and 5.
Published: 01 November 2022
Figure 6. Comparing functional occlusal traits (EDBI in A, ET in B) of extant Phacochoerus africanus , Pleistocene Potamochoerus sp., and Plio-Pleistocene Metridiochoerus (Supplementary Table 7); Potamochoerus sp. is characterized by a generalized suid dentition (short and brachydont M3s
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Drawing of the main components of the interpreted tidal channel fill exposed between sites 1 and 3 (see Fig. 3). The position of photographs in Figs. 6 and 7A are indicated. Note dinosaur tracks on both top and base of two thin sandstone beds within the upper part of the channel-fill, and brackish-water bivalves (Brachydontes, Ostrea) in the intervening mudstone. The channel cuts down through laminated and cross-bedded sandstone representing foreshore and surf zones, to rest on swaley cross-stratified sandstone representative of the middle shoreface. See Fig. 3 for legend to symbols.
Published: 29 June 2006
-fill, and brackish-water bivalves ( Brachydontes , Ostrea ) in the intervening mudstone. The channel cuts down through laminated and cross-bedded sandstone representing foreshore and surf zones, to rest on swaley cross-stratified sandstone representative of the middle shoreface. See Fig.  3
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A. 30 cm coal capping allomember AX5 in Flatbed Creek (see Fig. 11). Coal is erosively overlain at transgressive surface X by a 1.2 m thick oyster biostrome that marks the base of the Doe Creek unit. B. Detail of mixture of attached and broken oyster shells, with an associated fauna of Brachydontes and encrusting serpulid worms. C. Plan view of oyster bed showing large, horizontal, mutually-intersecting burrows, probably attributable to large arthropods, filled with broken oyster shells. D. Partially preserved carapace and appendages of an arthropod found in association with the burrows shown in C.
Published: 01 March 2019
of Brachydontes and encrusting serpulid worms. C. Plan view of oyster bed showing large, horizontal, mutually-intersecting burrows, probably attributable to large arthropods, filled with broken oyster shells. D. Partially preserved carapace and appendages of an arthropod found in association with the burrows
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Allomembers AX2 to AX5, exposed in the headwaters of Dickebusch Creek, BC. Each allomember is characterized by one or more, few-metre scale, upward-shoaling successions, bounded by flooding surfaces. Bivalves indicated by (B) include oysters, Brachydontes and Corbula, (McLearn, 1945), and are common immediately above flooding surfaces and attest to reduced-salinity conditions. Roots (R) and dinosaur tracks (DT) are very common in the upper parts of successions and indicate shallow-water to emergent conditions. An approximately 5–6 m deep, steeply-incised channel-fill hangs from the X transgressive surface. The channel fill shows no evidence of lateral migration.
Published: 01 March 2019
Figure 14. Allomembers AX2 to AX5, exposed in the headwaters of Dickebusch Creek, BC. Each allomember is characterized by one or more, few-metre scale, upward-shoaling successions, bounded by flooding surfaces. Bivalves indicated by (B) include oysters, Brachydontes and Corbula , ( McLearn
Journal Article
Journal: Paleobiology
Published: 01 February 2010
Paleobiology (2010) 36 (1): 113–136.
... (e.g., goats, pronghorn, and camels [ O'Gara 1978 ; Kohler-Rollefson 1991 ]) as well as mesodont grazers (e.g., Indian chital and chousingha [ Schaller 1967 ]). Solounias and Semprebon (2002) report grazing in certain brachydont fossil equids. Table 1 shows summary conclusions from other...
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First thumbnail for: Dietary interpretation and paleoecology of herbivo...
Second thumbnail for: Dietary interpretation and paleoecology of herbivo...
Third thumbnail for: Dietary interpretation and paleoecology of herbivo...
Journal Article
Published: 06 July 2007
Canadian Journal of Earth Sciences (2007) 44 (5): 585–592.
... of the tooth enamel itself is smooth, and cusps and crests are rounded. The teeth are brachydont. Fig. 2. Photograph of Boreameryx braskerudi , holotype, left jaw fragment with m1–m3 (CMN 52710). (A) medial view; (B) occlusal view; (C) lateral view. The basic four-cusped selenodont structure...
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First thumbnail for: Boreameryx , an unusual new artiodactyl (Mammalia)...
Second thumbnail for: Boreameryx , an unusual new artiodactyl (Mammalia)...
Third thumbnail for: Boreameryx , an unusual new artiodactyl (Mammalia)...
Journal Article
Journal: Geology
Published: 01 September 2012
Geology (2012) 40 (9): 823–826.
... information. Three classes of molar tooth crown height are recorded in the NOW database: brachydont, mesodont, and hypsodont. The criterion for assigning species to classes is based on the ratio of height to length of the second molar (upper or lower). Brachydont teeth have a ratio <0.8, mesodont teeth...
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First thumbnail for: Neogene aridification of the Northern Hemisphere
Second thumbnail for: Neogene aridification of the Northern Hemisphere
Journal Article
Published: 24 August 2017
Journal of Paleontology (2017) 91 (6): 1272–1295.
... , including also the monotypic genus Pachypithecus and its species P . macrognathus Ameghino, 1897 . According to Ameghino, Archaeopithecidae shared some features with primates, such as brachydont dentition and a primate-like jaw, which he cited as a reason to consider this family in the Prosimiae, just...
Journal Article
Published: 01 July 2004
Journal of Paleontology (2004) 78 (4): 731–740.
.... Prosciurus ? Rensberger and Li , 1986 , p. 764, figs. 1–1, 1–3, 2. Pseudallomys Korth , 1992 , p. 171, fig. 1. Cheek teeth brachydont, unlike meniscomyines and aplodontines, but with high cusps and crests, accounting for roughly a third of the total tooth height, unlike prosciurines...
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First thumbnail for: PHYLOGENY AND BIOGEOGRAPHY OF THE GENUS ANSOMYS (M...
Second thumbnail for: PHYLOGENY AND BIOGEOGRAPHY OF THE GENUS ANSOMYS (M...
Third thumbnail for: PHYLOGENY AND BIOGEOGRAPHY OF THE GENUS ANSOMYS (M...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1949
AAPG Bulletin (1949) 33 (4): 511–532.
... pelecypod Brachydontes multilinigera has in this paper been included in the overlying Kaskapau formation. In the Pouce Coupe area this species occurs approximately 120 feet above the top of the formation whereas along the creeks north of Spirit River approximately 50 miles east, it occurs precisely...
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First thumbnail for: Upper Cretaceous in Western Peace River Plains, Al...
Second thumbnail for: Upper Cretaceous in Western Peace River Plains, Al...
Third thumbnail for: Upper Cretaceous in Western Peace River Plains, Al...
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Figure 2. Cheek tooth crown height in extant and fossil equids. A, B, Basic tooth morphology, redrawn from Janis and Fortelius (1988). A, Brachydont, or low-crowned (human) tooth. The crown is defined as the enamel-covered part of the tooth above the gum line (Peyer 1968). B, Hypsodont, or high-crowned, (horse) tooth in which the height of the crown is increased through ontogenetically delayed root formation and finite tooth crown growth. Eruption of the crown occurs gradually in hypsodont teeth as the exposed part of the crown wears away (worn away crown marked by dashed lines). Note that the enamel is often present in most of the tooth, blurring somewhat the distinction between crown and root. C, Relative cheek tooth crown heights for fossil equids, redrawn and modified from MacFadden (1992: Fig. 11.6). Hypsodonty Index (HI) = M1MSTHT/M1APL (MacFadden 1992, 1998). Abbreviations (genera and species referred to in the text and in Fig. 1): ar = Archaeohippus; co = Cormohipparion; de = Desmatippus; di = Dinohippus; ep = Epihippus; eq = Equus; hi = Hipparion; hp = Hypohippus; hy = Hyracotherium; ka = Kalobatippus; meg = Megahippus; mes = Mesohippus (bairdii); mi = “Merychippus” insignis; mio = Miohippus; mp = “Merychippus” primus; na = Nannippus; ne = Neohipparion; on = Onohippidium; or = Orohippus; pc = “Parahippus“cognatus; pl = “P.” leonensis; pr = Protohippus.
Published: 01 March 2006
Figure 2. Cheek tooth crown height in extant and fossil equids. A, B, Basic tooth morphology, redrawn from Janis and Fortelius (1988) . A, Brachydont, or low-crowned (human) tooth. The crown is defined as the enamel-covered part of the tooth above the gum line ( Peyer 1968 ). B, Hypsodont
Journal Article
Published: 29 June 2006
Canadian Journal of Earth Sciences (2006) 43 (6): 631–652.
...-fill, and brackish-water bivalves ( Brachydontes , Ostrea ) in the intervening mudstone. The channel cuts down through laminated and cross-bedded sandstone representing foreshore and surf zones, to rest on swaley cross-stratified sandstone representative of the middle shoreface. See Fig.  3...
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First thumbnail for: Middle Turonian dinosaur paleoenvironments in the ...
Second thumbnail for: Middle Turonian dinosaur paleoenvironments in the ...
Third thumbnail for: Middle Turonian dinosaur paleoenvironments in the ...
Journal Article
Published: 01 November 2018
Rocky Mountain Geology (2018) 53 (2): 129–136.
... due to the fragmentary nature of the specimen. Discussion .—This specimen is clearly a heteromyid with brachydont cheek teeth similar to Perognathus; however, due to its condition, no specific identification can be made. Perognathus ranges from the Hemingfordian to Recent throughout most...
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First thumbnail for: Age of a Pliocene basin fill along the Sevier Rive...
Second thumbnail for: Age of a Pliocene basin fill along the Sevier Rive...
Third thumbnail for: Age of a Pliocene basin fill along the Sevier Rive...
Journal Article
Journal: Paleobiology
Published: 01 March 2006
Paleobiology (2006) 32 (2): 236–258.
...Figure 2. Cheek tooth crown height in extant and fossil equids. A, B, Basic tooth morphology, redrawn from Janis and Fortelius (1988) . A, Brachydont, or low-crowned (human) tooth. The crown is defined as the enamel-covered part of the tooth above the gum line ( Peyer 1968 ). B, Hypsodont...
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First thumbnail for: Evolution of hypsodonty in equids: testing a hypot...
Second thumbnail for: Evolution of hypsodonty in equids: testing a hypot...
Third thumbnail for: Evolution of hypsodonty in equids: testing a hypot...
Journal Article
Published: 01 December 1965
Bulletin of Canadian Petroleum Geology (1965) 13 (4): 503–508.
... and Brachydontes to shallow marine forms such as Inoceramus. The general fossil assemblages and configuration of the type Dunvegan Formation would suggest he marine margin of a delta. The stratigraphic relations of tlie formation are shown in Fig. 1. The Dunvegan Formation is generally accepted to be of an early...
Journal Article
Published: 01 September 2014
Jour. Geol. Soc. India (2014) 84 (3): 352–360.
... specimen except for the anterior part of the M 1 , which is slightly broken (Plate II, 5; Table 2 ). The cheek teeth are brachydont, presenting a middle stage of wear. The basal cingulum is slightly seen in these teeth. The M 1 looks smaller in size than the M 2 . The entostyle is absent in the M 1...
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First thumbnail for: Cervid remains from the Middle Siwaliks of Hasnot ...
Second thumbnail for: Cervid remains from the Middle Siwaliks of Hasnot ...
Third thumbnail for: Cervid remains from the Middle Siwaliks of Hasnot ...
Journal Article
Published: 01 March 2013
Journal of Paleontology (2013) 87 (2): 289–296.
... tooth row; plane of angular process inclined medioventrally making medial surface of mandible strongly concave, tooth row not vertically aligned with lower incisor; cheek teeth brachydont to mesodont and lophate; dental formula 1/1–0/0–1/1–3/3; P4–p4 progressively larger relative to M1/m1; distinct...
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First thumbnail for: Pipestoneomyidae, a New Family of Fossil Rodents (...
Second thumbnail for: Pipestoneomyidae, a New Family of Fossil Rodents (...
Third thumbnail for: Pipestoneomyidae, a New Family of Fossil Rodents (...
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1947
AAPG Bulletin (1947) 31 (11): 2054–2060.
...–9,350 feet are definitely Mesozoic in age, but there is uncertainty as to the precise position of the sediments. Reeside 5 identified Ostrea, Alectryonia, Plicatula, Camptonectes? , and Brachydontes from the core at 9,115–9,116 feet. Henbest 6 reports that the foraminifer related...
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First thumbnail for: Two Recent Wells in Coastal Plain of North Carolin...