Turtles of the World, 7th Edition: Annotated Checklist of Taxonomy, Synonymy, Distribution with Maps, and Conservation Status.

Dijk, Peter Paul van; Iverson, John; Rhodin, Anders G. J.; Shaffer, Bradley; Bour, Roger

doi:10.3854/crm.5.000.checklist.v7.2014

Cited by 122 publications

(98 citation statements)

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“…Of the 335 recognized turtle species [van Dijk et al, 2014], 87 have a known sex-determining mechanism (SDM) established based on either incubation experiments or cytogenetic evidence [Tree of Sex Consortium, 2014; Montiel et al, 2016]. Phylogenetic analyses recover temperature-dependent sex determination (TSD) as the ancestral SDM in turtles, and most evolutionary transitions involved the evolution of genotypic sex determination (GSD) [Janzen and Krenz, 2004;Valenzuela and Adams, 2011], with 2 potential reversals back to TSD inferred by maximum likelihood analysis [Valenzuela and Adams, 2011] ( fig.…”

Section: Evolution Of Turtle Sex Determinationmentioning

confidence: 99%

Cytogenetic Insights into the Evolution of Chromosomes and Sex Determination Reveal Striking Homology of Turtle Sex Chromosomes to Amphibian Autosomes

Montiel

Badenhorst²,

Lee³

et al. 2016

Cytogenet Genome Res

136

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Turtle karyotypes are highly conserved compared to other vertebrates; yet, variation in diploid number (2n = 26-68) reflects profound genomic reorganization, which correlates with evolutionary turnovers in sex determination. We evaluate the published literature and newly collected comparative cytogenetic data (G- and C-banding, 18S-NOR, and telomere-FISH mapping) from 13 species spanning 2n = 28-68 to revisit turtle genome evolution and sex determination. Interstitial telomeric sites were detected in multiple lineages that underwent diploid number and sex determination turnovers, suggesting chromosomal rearrangements. C-banding revealed potential interspecific variation in centromere composition and interstitial heterochromatin at secondary constrictions. 18S-NORs were detected in secondary constrictions in a single chromosomal pair per species, refuting previous reports of multiple NORs in turtles. 18S-NORs are linked to ZW chromosomes in Apalone and Pelodiscus and to X (not Y) in Staurotypus. Notably, comparative genomics across amniotes revealed that the sex chromosomes of several turtles, as well as mammals and some lizards, are homologous to components of Xenopus tropicalis XTR1 (carrying Dmrt1). Other turtle sex chromosomes are homologous to XTR4 (carrying Wt1). Interestingly, all known turtle sex chromosomes, except in Trionychidae, evolved via inversions around Dmrt1 or Wt1. Thus, XTR1 appears to represent an amniote proto-sex chromosome (perhaps linked ancestrally to XTR4) that gave rise to turtle and other amniote sex chromosomes.

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Section: Evolution Of Turtle Sex Determinationmentioning

confidence: 99%

Cytogenetic Insights into the Evolution of Chromosomes and Sex Determination Reveal Striking Homology of Turtle Sex Chromosomes to Amphibian Autosomes

Montiel

Badenhorst²,

Lee³

et al. 2016

Cytogenet Genome Res

136

View full text Add to dashboard Cite

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“…Taxon names were updated following Turtle Taxonomy Working Grop (2014). The analysis was run using PAUP v4.0a149 (Swofford, 2002), all characters were considered unordered and equal weighted, multistate taxa interpreted as polymorphism, gaps treated as “missing.” A heuristic search was performed using 10,000 replicates and TBR branch-swapping.…”

Section: Methodsmentioning

confidence: 99%

Palaeoamyda messeliananov. comb. (Testudines, Pan-Trionychidae) from the Eocene Messel Pit and Geiseltal localities, Germany, taxonomic and phylogenetic insights

Cadena

2016

PeerJ

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BackgroundAbundant pan-trionychid (soft-shell) turtles specimens have been found in Eocene sequences of central Europe, particularly from two localities in Germany, the Messel Pit (a UNESCO World Natural Heritage Site) and Geiseltal, traditionally attributed to Trionyx messelianus or Rafetoides austriacus. Over the last two decades new specimens of this taxon from these two localities have been discovered and fully prepared. However, they have remained unstudied, as well as their phylogenetic position inside Pan-Trionychidae is unknown.ResultsFive new specimens of Palaeoamyda messeliana nov. comb. from Messel Pit and Geiseltal localities are fully described here. A revised diagnosis for the species is also presented here, together with its inclusion in a phylogenetic analysis of Pan-Trionychidae that shows that this species is sister to the extant Amyda cartilaginea, one of the most abundant pan-trionychid (soft-shell) turtles from Asia, both members of the clade Chitrini. The specimens described in here are among the best and most complete fossil pan-trionychid skeletons so far known.

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“…Bour and Zaher (2005) developed a new taxonomic arrangement that placed both P. nasutus and P. raniceps (as well as 8 other species) in the genus Mesoclemmys. Current knowledge of the distribution of Mesoclemmys considers M. nasuta to be restricted to French Guiana and Surinam (Bour and Pauler 1987;McCord et al 2001;Bour and Zaher 2005) and M. raniceps to have a broad geographic range that includes Brazil, Bolivia, Perú, Ecuador, Colombia, and Venezuela (Iverson 1992;McCord et al 2001;Bour and Zaher 2005;Rueda-Almonacid et al 2007;Turtle Taxonomy Working Group 2014).…”

mentioning

confidence: 96%

The Presence ofMesoclemmys ranicepsandMesoclemmys nasutain Venezuela and Comments on the Type Locality ofHydraspis maculata(Chelidae)

Rivas

Barros

Molina

et al. 2015

Chelonian Conservation and Biology

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Turtles of the World, 7th Edition: Annotated Checklist of Taxonomy, Synonymy, Distribution with Maps, and Conservation Status.

Cited by 122 publications

References 0 publications

Cytogenetic Insights into the Evolution of Chromosomes and Sex Determination Reveal Striking Homology of Turtle Sex Chromosomes to Amphibian Autosomes

Cytogenetic Insights into the Evolution of Chromosomes and Sex Determination Reveal Striking Homology of Turtle Sex Chromosomes to Amphibian Autosomes

Palaeoamyda messeliananov. comb. (Testudines, Pan-Trionychidae) from the Eocene Messel Pit and Geiseltal localities, Germany, taxonomic and phylogenetic insights

The Presence ofMesoclemmys ranicepsandMesoclemmys nasutain Venezuela and Comments on the Type Locality ofHydraspis maculata(Chelidae)

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