Decoupling of morphological disparity and taxonomic diversity during the end-Permian mass extinction

Wan, Junyu; Foster, William J.; Tian, Li; Stubbs, Thomas L.; Benton, Michael J.; Qiu, Xincheng; Yuan, Aihua

doi:10.1017/pab.2020.57

Cited by 12 publications

(11 citation statements)

References 101 publications

(180 reference statements)

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“…Such decoupled changes in taxonomic diversity and morphological disparity can suggest different proxies for understanding the ecological impact of an extinction event for example (Wan et al . 2021). Morphological disparity of trilobites has been extensively documented in the Cambrian and the Ordovician (Foote 1991 a ; Smith & Lieberman 1999; Webster 2007; Hopkins 2013; Jacobs & Carlucci 2019).…”

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confidence: 99%

Morphological disparity trends in Devonian trilobites from North Africa

2022

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The Devonian was a time of drastic environmental change that shaped the morphology of trilobites. This study aims to investigate their morphological evolution and to show the influence of some abiotic and biotic factors (bathymetry, feeding habits and visual abilities) on their shape. A dataset was compiled to investigate the shape of three structures (cephalon as a whole, central part of the cephalon, and pygidium) of Devonian trilobites from North Africa, using a geometric morphometric approach. Based on empirical morphospaces, the morphological changes were quantified through the Devonian stages. The results reveal important variations in the morphological disparity of the glabella shape, the facial suture location, the pygidial length and the presence of spines. In the Lochkovian, morphological disparity was low, subsequently increased in the Pragian with numerous innovations, and reached a maximum in the Emsian. If the morphospace occupancy remained until the Eifelian, a severe loss of disparity occurred in the Givetian, a time known for important environmental changes. Disparity then remained low in the Late Devonian. The shapes inherited from the Silurian persisted throughout the Devonian whereas Pragian novelties were most affected by losses. These persistent shapes were more versatile for environmental adaptation, helping those trilobites to survive the environmental events. Similarly, the trilobite orders that survived Devonian events had a wide morphological spectrum and were better adapted to withstand environmental change.

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Morphological disparity trends in Devonian trilobites from North Africa

2022

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“…Particularly, morphological disparity may unveil hidden evolutionary patterns and causalities (Deline, 2021;Deline et al, 2018;Nel et al, 2018) through the insight into the relative importance of genomic and ecological factors in macroevolution (Foote, 1997). The study of the relationship of disparity vs species diversity may reveal interesting evolutionary correlations and causalities particularly, when the objects are difficult to observe (Copilaș-Ciocianu & Sidorov, 2021;Triantis et al, 2016) or not anymore, such as in fossils (e.g., Neige, 2003;Nel et al, 2018;Ruta et al, 2013;Wan et al, 2021).…”

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confidence: 99%

Comparative analysis of morphospace of Neotropical Sericini (Coleoptera: Scarabaeidae): disparity in the light of species diversity and activity patterns

Pacheco

Monné²,

Ahrens

2021

Org Divers Evol

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The striking diversity among herbivorous Scarabaeoidea is still poorly understood. Therefore, we compare in these work linear measurements of body features of Neotropical and Old World linages of Sericini chafers to uncover patterns possibly linked to foraging behavior (day or night activity) or to the success of their diversification in terms of diversity. If diversity in Sericini chafers would be linked to morphological disparity, we would expect in the much less diverse Neotropical lineage a very clear drop of morphological disparity. Comparing the two major sister clades, Old World and Neotropical Sericini, in terms of their disparity and diversity, the here elaborated distance data do not support the hypothesis that morphological disparity could be a driver for the diversity of Sericini in the Old World. The influence of the metacoxal length on morphological disparity appears to represent a possible key for a better understanding of the evolution of Sericini in the Neotropical region (including their lower diversity) and answers the question of why they are so much less diverse than their sister lineage in the Old World. The increasing length of the metacoxal plate appears to be a result of the presence of a secondary metacoxal joint in Old World Sericini, which has a crucial impact on hind leg mobility and digging behavior. General body shape and single morphological characters appear under similar general evolutionary pressure: high morphometric disparity between nocturnal and diurnal Neotropical species was also corroborated by disparity estimated from discrete morphological characters.

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“…So far, landmark‐based geometric morphometrics has rarely been applied to the Palaeozoic ostracods (but see Wan et al . 2021 for a case study). In this study, we integrate both landmarks and semi‐landmarks for the quantification of ostracod shape.…”

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confidence: 99%

“…2015; Wan et al . 2021), the shape–size relationship of ostracods has rarely been assessed statistically.…”

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Allometry in Late Devonian Podocopa ostracods (Crustacea) and its implications for ostracod ontogeny

Song

Huang

Qie

2023

Papers in Palaeontology

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Podocopa ostracods have abounded in various marine and non‐marine habitats since the early Palaeozoic and left a diverse fossil record in strata worldwide. This is particularly useful for stratigraphic correlation and palaeoenvironmental and palaeogeographical reconstructions. However, despite being the most numerous ostracods during the Palaeozoic, their origins, evolution, ontogeny and phylogeny remain poorly defined. This paper represents the first study of morphological variation in Devonian Platycopida ostracods (an order of Podocopa) using a geometric morphometric approach. Our results identify substantial shape variation in Cribroconcha honggulelengensis Song & Crasquin from the Upper Devonian Hongguleleng Formation of western Junggar, northwest China, demonstrating a remarkable change in juveniles between stages A‐3 and A‐2. Using linear regressions between principal component scores from right lateral view and carapace length, we demonstrate allometric growth patterns for this species. The body plan of C. honggulelengensis developed along an ontological variable: from an ovate outline with rare pores to an oblong outline with dense and large pores. Environmental factors should play an important role in shape determination during ontogeny of C. honggulelengensis.

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Decoupling of morphological disparity and taxonomic diversity during the end-Permian mass extinction

Cited by 12 publications

References 101 publications

Morphological disparity trends in Devonian trilobites from North Africa

Morphological disparity trends in Devonian trilobites from North Africa

Comparative analysis of morphospace of Neotropical Sericini (Coleoptera: Scarabaeidae): disparity in the light of species diversity and activity patterns

Allometry in Late Devonian Podocopa ostracods (Crustacea) and its implications for ostracod ontogeny

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