Osteology, phylogeny, and functional morphology of two Jurassic lizard species and the early evolution of scansoriality in geckoes

Simões, Tiago R.; Nydam, Randall L.; Jiménez-Huidobro, Paulina

doi:10.1111/zoj.12487

Cited by 23 publications

(53 citation statements)

References 51 publications

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“…Yabeinosaurus has a much larger anteromedial process on the frontal (Evans & Wang ) and Eichstaettisaurus has one of comparable size to Ardeosaurus (Simões et al . ). The suture between frontal and parietal is transverse with a distinct interdigitation illustrated by Mateer () but not well preserved in the Ettling specimen.…”

Section: Resultsmentioning

confidence: 97%

“…digitatellus holotype (Simões et al . ). The projection is covered almost completely in the Ettling specimen by a compound osteoderm of similar shape.…”

Section: Resultsmentioning

confidence: 97%

“…Posteriorly, they reach about one‐third of the orbit; a bit further than in Yabeinosaurus (Evans & Wang ), but less than in Eichstaettisaurus (Simões et al . ).…”

Section: Resultsmentioning

confidence: 97%

“…The frontals are not fused (Figs 1–3), similar to other specimens of Ardeosaurus (Mateer ), although Simões et al . () suggested partial fusion in the holotype of A . digitatellus .…”

Section: Resultsmentioning

confidence: 97%

“…The four taxa were also added to the similar data set provided by Simões et al . () and analysed according to settings published there.…”

Section: Methodsmentioning

confidence: 99%

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An exceptionally preserved Jurassic skink suggests lizard diversification preceded fragmentation of Pangaea

Tałanda

2018

Palaeontology

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The present distribution of lizards is usually explained as a result of relatively recent global events, i.e. faunal turnovers or exchanges within and between particular continents mostly connected with glaciations and land‐bridges. However, today's disjunct distribution of the North American Xantusiidae and African Cordyliformes (close relatives of skinks) does not fit generally accepted biogeographical patterns. A new, exquisitely preserved specimen of the Late Jurassic lizard Ardeosaurus brevipes from the Solnhofen area, Germany sheds some light on the problem. A posterior projection of its parietal is known only in the Dibamidae, Gekkota and Scincoidea, taxa representing first branches on the molecular tree of lizards. The projection of the parietal is proposed to be an apomorphy of the Squamata that was lost in the common ancestor of Lacertoidea and Toxicofera (snakes, anguimorphs and iguanians). This implies a basalmost position of A. brevipes on the Squamata tree. The location of the supratemporal such as in A. brevipes characterizes all the Scincoidea and some geckos, but most geckos lack osteoderms, which are common in Scincoidea. This makes A. brevipes the oldest known crown‐member of this lineage. Moreover, this indicates that the main groups of modern lizards were already present in the Jurassic. Ancestors of Cordyliformes migrated to Gondwana in the Late Jurassic together with dinosaurs, prior to the Cretaceous separation of this ancient continent.

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Section: Resultsmentioning

confidence: 97%

“…digitatellus holotype (Simões et al . ). The projection is covered almost completely in the Ettling specimen by a compound osteoderm of similar shape.…”

Section: Resultsmentioning

confidence: 97%

“…Posteriorly, they reach about one‐third of the orbit; a bit further than in Yabeinosaurus (Evans & Wang ), but less than in Eichstaettisaurus (Simões et al . ).…”

Section: Resultsmentioning

confidence: 97%

“…The frontals are not fused (Figs 1–3), similar to other specimens of Ardeosaurus (Mateer ), although Simões et al . () suggested partial fusion in the holotype of A . digitatellus .…”

Section: Resultsmentioning

confidence: 97%

“…The four taxa were also added to the similar data set provided by Simões et al . () and analysed according to settings published there.…”

Section: Methodsmentioning

confidence: 99%

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An exceptionally preserved Jurassic skink suggests lizard diversification preceded fragmentation of Pangaea

Tałanda

2018

Palaeontology

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The Origin and Early Evolutionary History of Snakes

2022

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Snakes comprise nearly 4,000 extant species found on all major continents except Antarctica. Morphologically and ecologically diverse, they include burrowing, arboreal, and marine forms, feeding on prey ranging from insects to large mammals. Snakes are strikingly different from their closest lizard relatives, and their origins and early diversification have long challenged and enthused evolutionary biologists. The origin and early evolution of snakes is a broad, interdisciplinary topic for which experts in palaeontology, ecology, physiology, embryology, phylogenetics, and molecular biology have made important contributions. The last 25 years has seen a surge of interest, resulting partly from new fossil material, but also from new techniques in molecular and systematic biology. This volume summarises and discusses the state of our knowledge, approaches, data, and ongoing debates. It provides reviews, syntheses, new data and perspectives on a wide range of topics relevant to students and researchers in evolutionary biology, neontology, and palaeontology.

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The Origin and Early Diversification of Squamates

Evans¹

2022

The Origin and Early Evolutionary History of Snakes

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Squamata, the group that encompasses snakes, lizards, and amphisbaenians, is the largest (>10,500 sp.) and most disparate group of modern reptiles. Extant squamates are distributed over all but the coldest parts of the world; range in size (snout-vent length, SVL) from millimetres to metres; and show a diversity of diets, shapes, locomotor patterns, and reproductive strategies. Snakes (Serpentes) account for roughly 35 per cent of all extant squamate species and their origin and relationships, which have long intrigued herpetologists, are the focus of this volume. This chapter aims to provide a foundation for subsequent chapters, by reviewing what is currently known of the early stages of squamate evolution and diversification.Most researchers recognize eight extant major squamate clades (Fig. 2.1): Dibamidae; Gekkota; Scincoidea (=Scinciformata [1]), encompassing Xantusiidae, Scincidae, and Cordyliformes; Lacertoidea (=Laterata [1]), encompassing Lacertidae and Teiioidea; Amphisbaenia; Iguania; Anguimorpha; and Serpentes. Although Camp [2] considered Gekkota to be primitive squamates (part of his Ascalabota), the first comprehensive cladistic analysis [3], based on morphological characters, placed Iguania as the sister group of other squamates (Scleroglossa). Within Scleroglossa, Estes et al. [3] united Scincoidea + Lacertoidea in Scincomorpha, and Scincomorpha + Anguimorpha as Autarchoglossa. The position of three limb-reduced clades, Dibamidae, Amphisbaenia, and Serpentes, was unresolved within Scleroglossa. The topology of Estes et al. [3] remained the working hypothesis for most herpetologists until 2004 with the publication of phylogenies based on molecular data [4,5]. The molecular trees placed Gekkota rather than Iguania as the sister group of other squamates (invalidating Scleroglossa), with Scincoidea, and then Lacertoidea (including Amphisbaenia) as successive outgroups to a Toxicofera that

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Osteology, phylogeny, and functional morphology of two Jurassic lizard species and the early evolution of scansoriality in geckoes

Cited by 23 publications

References 51 publications

An exceptionally preserved Jurassic skink suggests lizard diversification preceded fragmentation of Pangaea

An exceptionally preserved Jurassic skink suggests lizard diversification preceded fragmentation of Pangaea

The Origin and Early Evolutionary History of Snakes

The Origin and Early Diversification of Squamates

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