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The Turtles of Mexico is the first comprehensive guide to the biology, ecology, evolution, and distribution of more than fifty freshwater and terrestrial turtle taxa found in Mexico. Legler and Vogt draw on more than fifty years of fieldwork to elucidate the natural history of these species. The volume includes an extensive introduction to turtle anatomy, taxonomy, phylogeny, biogeography, and physiology. A key to the turtles of Mexico is included along with individual species accounts featuring geographic distribution maps and detailed color illustrations. Specific topics discussed for each species include habitat, diet, feeding behavior, reproduction, predators, parasites, growth and ontogeny, sexual dimorphism, growth rings, economic use, conservation, legal protection, and taxonomic studies. This book is a complete reference for scientists, conservationists, and professional and amateur enthusiasts who wish to study Mexican turtles.

Western Painted Turtles (Ckrysemys picta bellii) are 1 of only 2 native turtles in the Pacific Northwest. In October 2021, we recaptured an adult male 21 y after it was initially marked. In 2000, it had at least 9 annuli, indicating an age of at least 30 y in 2021. This approximates only half the maximum known age for the larger C. picta species complex east of the continental divide (61 y). Further, in 2000, this adult male was 37-43 mm larger than the largest or oldest males recorded from eastern populations of C. p. bellii, which suggests that fundamental differences may exist in growth between eastern and western populations that may reflect different age-size relationships. These relationships, along with longevity data, are foundational to conservation that seeks to understand demography and survival in western populations. Study of eastern populations shows that determination of age limits may span decades, so collaboration for data-sharing over long timelines to understand the patterns in western populations will be crucial.

Uno de los linajes de tortugas mas diversos en los registros tanto del Jurasico Superior como del Cretacico Inferior de Europa es el de las tortugas basales Pleurosternidae (Paracryptodira), estando tambien presente en Norteamerica. El representante europeo mas antiguo de este linaje es la especie portuguesa Selenemys lusitanica, conocida desde el Kimmeridgiense superior hasta el Titoniense inferior (Jurasico Superior). La informacion sobre el caparazon de este taxon era hasta el momento muy limitada, estando restringida a aquella aportada en la publicacion en la que la especie fue definida. Nuevos ejemplares de varias localidades del Kimmeridgiense superior al Titoniano en la Subcuenca de Consolacion, en la Cuenca Lusitanica (Portugal) son aqui estudiados. Proceden de los distritos de Leiria y de Lisboa. Entre estos restos se incluye el caparazon mas completo de la especie encontrado hasta el momento, asi como varias placas aisladas que permiten mejorar el conocimiento sobre la misma. De esta forma, nueva informacion sobre la anatomia del caparazon de Selenemys lusitanica es aportada, asi como sobre su variabilidad intraespecifica. Palabras clave Paracryptodira * Pleurosternidae * Jurasico Superior * Cuenca Lusitanica * Anatomia del caparazon * Variabilidad intraespecifica One of the most diverse turtle lineages in the Upper Jurassic and Lower Cretaceous record of Europe is that of the stem turtles Pleurosternidae (Paracryptodira), also distributed in North America. The oldest European representative of this lineage is the Portuguese Selenemys lusitanica, known from upper Kimmeridgian to lower Tithonian levels (Late Jurassic). The information on the shell of this taxon is so far very limited, being exclusively restricted to that provided in the publication in which the taxon was defined. New specimens from several upper Kimmeridgian to Tithonian localities in the Consolacao Sub-basin of the Portuguese Lusitanian Basin, both from the Leiria District and the Lisbon District, are studied here. They include the most complete shell of the species found so far, as well as several isolated plates that allow us to improve knowledge about it. Thus, new information about the shell anatomy of Selenemys lusitanica is provided, but also about its intraspecific variability. Keywords Paracryptodira * Pleurosternidae * Late Jurassic * Lusitanian Basin * Shell anatomy * Intraspecific variability