Evolution of Craniodental Correlates of Diet in African Bovidae

Lazagabaster, Ignacio A.; Rowan, John; Kamilar, Jason M.; Reed, Kaye E.

doi:10.1007/s10914-016-9329-x

Cited by 18 publications

(17 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…) or African bovids (Lazagabaster et al . ). It is not surprising that results are less significant when accounting for phylogenetic non‐independence.…”

Section: Discussionmentioning

confidence: 97%

“…), as it has been shown that accounting for phylogenetic non‐independence is important in studies dealing with morphological differences across groups (Scott & Barr ; Lazagabaster et al . ). Phylogenetic ANOVA uses empirically scaled characters evolving along a given phylogenetic tree to calculate null F distributions that are different from those obtained from non‐phylogenetic ANOVAs, bootstrapping or other mathematical randomization techniques (Garland et al .…”

Section: Methodsmentioning

confidence: 97%

See 1 more Smart Citation

Inferring diet from dental morphology in terrestrial mammals

et al. 2016

Self Cite

View full text Add to dashboard Cite

Summary Dietary inferences are a key foundation for paleoecological, ecomorphological and macroevolutionary studies because they inform us about the direct relationships between the components of an ecosystem. However, we need to consider the range of dietary variation we want to investigate and characterize before choosing a proxy. The goal of the present work is to evaluate the differences in dietary discrimination power between our new method, the multidimensional multi‐proxy dental morphology analysis (MPDMA) and unidimensional dental morphology proxies such as orientation patch count (OPCR), relief index (RI) or slope. In order to do that, we three‐dimensionally scanned the dentitions of 134 extant mammals including 28 marsupials (order Diprotodontia) and 106 placentals (orders Carnivora, Primates and Rodentia) and classified their diets using a new classification scheme that emphasizes the primary resource in a given diet. Diet categories included herbivory, carnivory, frugivory, granivory, insectivory, fungivory, gumivory and generalist. Unidimensional proxies significantly discriminate (P < 0·05) between one or two diet categories on the one hand and the rest on the other. For example, OPCR discriminates well between carnivorous and non‐carnivorous species. However, none of the individual proxies discriminate all eight dietary categories. Multi‐proxy dental morphology analysis demonstrates significant morphological differences across diets (MANOVA, d.f. = 7; F = 7·56; P < 0·05) and correctly discriminates diet for 67–82% of the specimens in the data set including and excluding rodents respectively. Combining different morphological variables makes it possible to draw better dietary inferences and fully represent the multidimensional nature of dental morphology and dietary specializations. Our results have important applications in ecological, paleoecological and evolutionary research.

show abstract

“…) or African bovids (Lazagabaster et al . ). It is not surprising that results are less significant when accounting for phylogenetic non‐independence.…”

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

Inferring diet from dental morphology in terrestrial mammals

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…From the Late Jurassic to the Late Cretaceous, multituberculates included in our dataset move toward more extreme negative PC1 and PC2 scores representing the appearance of species with larger diastemas and a greater articulation offset (figure 1 a ). These traits are often associated with more herbivorous diets [31] and are well-developed in many modern browsers and grazers. The consistent pattern recovered by studies measuring different aspects of the feeding apparatus (dental complexity using OPC [22], jaw morphology using GMM analyses [51] and jaw functional morphology using continuous character trait ratios [current study]) lends weight to the hypothesis that multituberculates responded to environmental changes such as the Cretaceous angiosperm radiation [51,52] by adapting multiple aspects of jaw and tooth morphology to a more plant-rich diet.…”

Section: Discussionmentioning

confidence: 99%

“…Six mechanically relevant jaw ratios (relative diastema length, relative molar row length, jaw closing mechanical advantage, jaw slenderness, coronoid process slenderness and relative articulation offset; further described in the electronic supplementary material; and see Anderson et al [30] and Lazagabaster et al [31]) were collected from 256 species representing all major terrestrial mammalian groups from the Middle Jurassic to the end-Eocene. Jaw measurements were collected from images of jaws in the literature, as well as first hand from fossil mammal collections (listed in the electronic supplementary material).…”

Section: Methodsmentioning

confidence: 99%

Patterns of mammalian jaw ecomorphological disparity during the Mesozoic/Cenozoic transition

Benson

Friedman

2019

Proc. R. Soc. B.

View full text Add to dashboard Cite

The radiation of mammals after the Cretaceous/Palaeogene (K/Pg) boundary was a major event in the evolution of terrestrial ecosystems. Multiple studies point to increases in maximum body size and body size disparity, but patterns of disparity for other traits are less clear owing to a focus on different indices and subclades. We conducted an inclusive comparison of jaw functional disparity from the Early Jurassic–latest Eocene, using six mechanically relevant mandibular ratios for 256 species representing all major groups. Jaw functional disparity across all mammals was low throughout much of the Mesozoic and remained low across the K/Pg boundary. Nevertheless, the K/Pg boundary was characterized by a pronounced pattern of turnover and replacement, entailing a substantial reduction of non-therian and stem-therian disparity, alongside a marked increase in that of therians. Total mammal disparity exceeded its Mesozoic maximum for the first time during the Eocene, when therian mammals began exploring previously unoccupied regions of function space. This delay in the rise of jaw functional disparity until the Eocene probably reflects the duration of evolutionary recovery after the K/Pg mass extinction event. This contrasts with the more rapid expansion of maximum body size, which occurred in the Palaeocene.

show abstract

“…Further, investigations of jaw morphology and diet across Mammalia are rare, especially in comparison to similar studies of mammalian tooth shape (Evans et al 2007;Boyer 2008;Christensen 2014;Pineda-Munoz et al 2017;Berthaume et al 2019). And a majority of studies on mammalian jaw shape and diet are qualitative (e.g., Maynard Smith and Savage 1959), lack statistical correction for phylogenetic non-independence (e.g., Grossnickle and Polly 2013), or focus on mammalian subclades rather than all of Mammalia (Radinsky 1981;Radinsky 1985;Anapol and Lee 1994;Janis 1995;Mendoza et al 2002;Nogueira et al 2005;Figueirido et al 2010;Meloro and O'Higgins 2011;Monteiro and Nogueira 2011;Ross et al 2012;Lazagabaster et al 2016;Maestri et al 2016;Arregoitia et al 2017). I incorporate data from 21 taxonomic orders of therians, thus providing insight on convergent evolutionary changes in jaw morphology across broad taxonomic groups.…”

mentioning

confidence: 99%

Feeding ecology has a stronger evolutionary influence on functional morphology than on body mass in mammals

Grossnickle

2020

Evolution

View full text Add to dashboard Cite

Ecological specialization is a central driver of adaptive evolution. However, selective pressures may uniquely affect different ecomorphological traits (e.g., size and shape), complicating efforts to investigate the role of ecology in generating phenotypic diversity. Comparative studies can help remedy this issue by identifying specific relationships between ecologies and morphologies, thus elucidating functionally relevant traits. Jaw shape is a dietary correlate that offers considerable insight on mammalian evolution, but few studies have examined the influence of diet on jaw morphology across mammals. To this end, I apply phylogenetic comparative methods to mandibular measurements and dietary data for a diverse sample of mammals. Especially powerful predictors of diet are metrics that capture either the size of the angular process, which increases with greater herbivory, or the length of the posterior portion of the jaw, which decreases with greater herbivory. The size of the angular process likely reflects sizes of attached muscles that produce jaw movements needed to grind plant material. Further, I examine the impact of feeding ecology on body mass, an oft‐used ecological surrogate in macroevolutionary studies. Although body mass commonly increases with evolutionary shifts to herbivory, it is outperformed by functional jaw morphology as a predictor of diet. Body mass is influenced by numerous factors beyond diet, and it may be evolutionarily labile relative to functional morphologies. This suggests that ecological diversification events may initially facilitate body mass diversification at smaller taxonomic and temporal scales, but sustained selective pressures will subsequently drive greater trait partitioning in functional morphologies.

show abstract

Evolution of Craniodental Correlates of Diet in African Bovidae

Cited by 18 publications

References 50 publications

Inferring diet from dental morphology in terrestrial mammals

Inferring diet from dental morphology in terrestrial mammals

Patterns of mammalian jaw ecomorphological disparity during the Mesozoic/Cenozoic transition

Feeding ecology has a stronger evolutionary influence on functional morphology than on body mass in mammals

Contact Info

Product

Resources

About