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Polymorphic characters in the reconstruction of the phylogeny of geoemydid turtles

Garbin, Rafaella C. ; Ascarrunz, Eduardo ; Joyce, Walter G.

In: Zoological Journal of the Linnean Society, 2018, vol. 184, no. 3, p. 896-918

New material of “Eurysternidae” (Thalassochelydia, Pan-Cryptodira) from the Kimmeridgian of the Swiss Jura Mountains

Püntener, Christian ; Anquetin, Jérémy ; Billon-Bruyat, Jean-Paul

In: Palaeovertebrata, 2020, vol. 43, no. 1, p. e2

The region of Porrentruy (Swiss Jura Mountains) is known for its rich and diverse assemblage of Late Jurassic coastal marine turtles (Thalassochelydia). Dominated by the “Plesiochelyidae”, this assemblage also includes representatives of the two other thalassochelydian groups, the “Thalassemydidae” and “Eurysternidae.” In this study, we present new shell-based material from Porrentruy...

Evolution of neck vertebral shape and neck retraction at the transition to modern turtles: an integrated geometric morphometric approach

Werneburg, Ingmar ; Wilson, Laura A.B. ; Parr, William C. H. ; Joyce, Walter G.

In: Systematic Biology, 2014, p. syu072

The unique ability of modern turtles to retract their head and neck into the shell through a side-necked (pleurodiran) or hidden-necked (cryptodiran) motion is thought to have evolved independently in crown turtles. The anatomical changes that led to the vertebral shapes of modern turtles, however, are still poorly understood. Here we present comprehensive geometric morphometric analyses that...