Primitive<i>Mylohyus</i>(Artiodactyla: Tayassuidae) from the late Hemphillian Bone Valley of Florida

Wright, David B.; Webb, S. David

doi:10.1080/02724634.1984.10011969

Cited by 7 publications

(17 citation statements)

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“…Previously only known from the Palmetto Fauna of Florida (Wright & Webb, 1984;Wright, 1991Wright, , 1998 (Fig 1). Although this discovery expands the range of M. elmorei, it does not negate the assertion by Webb et al (2008) that the species is endemic to the southeastern North America.…”

Section: Discussionmentioning

confidence: 99%

“…Additional measurement data is taken from (T) Schultz and Martin (1975), (H) Hesse (1935), and (C) Colbert (1938). (Wright and Webb, 1984;Wright, 1991Wright, , 1998. Wright (1998) reports material with affinity to Mylohyus longirostris from the Mixon's Bone Bed local fauna of northern Florida; however, no specimens are directly listed to verify this claim.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Dental measurements for both upper and lower dentition (A) follow Wright (1984Wright ( , 1991 with the addition the transverse measurement across the hypoconule/hypoconulid complex.…”

Section: Figurementioning

confidence: 99%

“…Dental nomenclature (B-E) is modified from Wright (1989Wright ( , 1991Wright ( , 1998 in regards to the posterior heel of upper and lower m3. This accessory cusp-bearing, posteriorly-oriented extension of the M3 and m3's talon/talonid is not referred to in a unified manner within the literature but is typically referred to as the "posterior lobe", "posterior heel", or "heel" (Matthew, 1924;Kinsey, 1974;Schultz & Martin, 1975;Dalquest & Mooser, 1980;Wright & Webb, 1984;Wright, 1989Wright, , 1991. Despite indicating a general location on the M3/m3, these terms are undescriptive as they do little to describe the composition of the feature, which bears the hypoconule/hypoconulid and a variable number of accessory cusps.…”

Section: Figurementioning

confidence: 99%

“…Fort Green Mine, Palmetto Mine, Payne Creek, Saddle Creek Mine, and South Pierce quarries) within the Central Florida Phosphate District of Polk, Hillsborough, Manatee, and Hardee counties ( Fig. 1) (Wright & Webb, 1984;Wright, 1989;Hulbert, 2001;Webb et al, 2008). Outside of the Palmetto Fauna, the eastern record is represented by the Pipe Creek paleosinkhole of Indiana (Hh4) (Farlow et al, 2001;Prothero & Sheets, 2013), the Mauville local fauna of Alabama (Hh2) (Hulbert & Whitmore, 2006), and the Tyner Farm locality of Florida (late Hh1 to early Hh2) (Hulbert & Whitmore, 2006;Hulbert et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

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Peer Review #2 of "First occurrence of the enigmatic peccaries Mylohyus elmorei and Prosthennops serus from the Appalachians: latest Hemphillian to Early Blancan of Gray Fossil Site, Tennessee (v0.1)"

2018

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Two peccary species, Mylohyus elmorei and Prosthennops serus are described from the medium-bodied fauna of the Gray Fossil Site (GFS) of northeastern Tennessee. This site, recognized as an oak-hickory forest, is latest Hemphillian or earliest Blancan based on mammalian biochronology, with an estimated age of 4.9-4.5 Ma. The GFS represents the only site outside the Palmetto Fauna of Florida with M. elmorei, greatly expanding the species range north over 920 km, well into the Appalachian region. This is also the first Appalachian occurrence of the relatively widespread P. serus. Our understanding of intraspecific variation for both M. elmorei and P. serus is expanded due to morphological and proportional differences found in cranial and dental material from the GFS, Tyner Farm locality, Palmetto Fauna, and within the literature. The GFS M. elmorei material represents the most complete mandible and second cranium for the species, and preserve intraspecific variation in the length of the diastema, dental proportions, and the complexity of the cuspules hypoconulid complex. Similarly, mandibular material from the GFS for P. serus exhibited larger dentitions and a greater degree of robustness than currently recognized for the species.

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Section: Discussionmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

“…Dental measurements for both upper and lower dentition (A) follow Wright (1984Wright ( , 1991 with the addition the transverse measurement across the hypoconule/hypoconulid complex.…”

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Peer Review #2 of "First occurrence of the enigmatic peccaries Mylohyus elmorei and Prosthennops serus from the Appalachians: latest Hemphillian to Early Blancan of Gray Fossil Site, Tennessee (v0.1)"

2018

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Evolution of sexually dimorphic characters in peccaries (Mammalia, Tayassuidae)

Wright

1993

Paleobiology

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Cladistic analysis of osteological and dental characters in a monophyletic group of Miocene and younger tayassuids demonstrates a pattern of changes in the degree of sexual dimorphism in canine tooth diameter and zygomatic arch width, and in phenotypic correlations between these characters. Primitively, tayassuids have canine teeth that are sexually dimorphic and discretely bimodal in size, and zygomatic arches that are narrow in both sexes. Many late Miocene and Pliocene tayassuids have broad, winglike zygomatic processes. In some species, these processes are large in both sexes, but in others, those of females are much smaller than those of males. The presence of large processes in both sexes is primitive relative to the condition of strong sexual dimorphism. In five separate clades, the zygomatic processes of both sexes become reduced in size, and the degree of sexual dimorphism in canine size becomes reduced as well. The pattern is congruent with predictions derived from a theoretical model of the evolution of sexual dimorphism, and it further indicates the emergence of a new phenotypic correlation between two previously uncorrelated characters, canine size and zygoma size. The advent of this new correlation coincides with the advent of pronounced sexual dimorphism in zygomatic processes. Although such a pattern could be explained by genetically modifying phenotypic expression of homologous characters in one sex or the other, an epigenetic modification of expression is equally plausible: the evolution of sexual dimorphism in homologous characters could be accomplished by placing phenotypic expression of an originally monomorphic character under the control of steroid sex hormones. This hypothesis is consistent with evidence from many vertebrate groups, and it provides testable predictions.

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A newCormohipparion(Mammalia, Equidae) from the Pliocene (latest Hemphillian and Blancan) of Florida

Hulbert

1988

Journal of Vertebrate Paleontology

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PrimitiveMylohyus(Artiodactyla: Tayassuidae) from the late Hemphillian Bone Valley of Florida

Cited by 7 publications

References 4 publications

Peer Review #2 of "First occurrence of the enigmatic peccaries Mylohyus elmorei and Prosthennops serus from the Appalachians: latest Hemphillian to Early Blancan of Gray Fossil Site, Tennessee (v0.1)"

Peer Review #2 of "First occurrence of the enigmatic peccaries Mylohyus elmorei and Prosthennops serus from the Appalachians: latest Hemphillian to Early Blancan of Gray Fossil Site, Tennessee (v0.1)"

Evolution of sexually dimorphic characters in peccaries (Mammalia, Tayassuidae)

A newCormohipparion(Mammalia, Equidae) from the Pliocene (latest Hemphillian and Blancan) of Florida

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