Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States.

  title={Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States.},
  author={Travis M. Thomas and Michael C. Granatosky and Jason R. Bourque and Kenneth L Krysko and Paul E. Moler and Tony Gamble and Eric Suarez and Erin Hoerl Leone and Joe Roman},
The Alligator Snapping Turtle, Macrochelys temminckii, is a large, aquatic turtle limited to river systems that drain into the Gulf of Mexico. [] Key Method We measured cranial (n=145) and post-cranial (n=104) material on field-captured individuals and museum specimens. We analyzed 420 base pairs (bp) of mitochondrial DNA sequence data for 158 Macrochelys. We examined fossil Macrochelys from ca. 15-16 million years ago (Ma) to the present to better assess historical distributions and evaluate named fossil…

Evaluating recent taxonomic changes for alligator snapping turtles (Testudines: Chelydridae).

A sound understanding of species delimitation and richness is critical for the conservation of alligator snapping turtles, especially if the acceptance of a widely distributed species disguises the presence of multiple, smaller-ranged species.

Phylogenetic, population genetic, and morphological analyses reveal evidence for one species of Eastern Indigo Snake (Drymarchon couperi)

Drymarchon kolpobasileus is formally placed into synonymy with D. couperi and inconsistent patterns between mitochondrial and nuclear DNA may be driven by high dispersal of males relative to females.

Establishing Reference Demography for Conservation: A Case Study of Macrochelys temminckii in Spring Creek, Georgia

It is suggested that the population parameters described at Spring Creek are the best approximation of reference demographic conditions for Macrochelys to date, and this study provides a general framework applicable for large, long-lived, endangered turtle species for which demographic data are unavailable.

Taxonomic and conservation implications of population genetic admixture, mito-nuclear discordance, and male-biased dispersal of a large endangered snake, Drymarchon couperi

Examining Drymarchon couperi, a large, federally-protected species in North America that was recently divided into two species, is examined, and inconsistent patterns between mitochondrial and nuclear DNA are suggested to be driven by high dispersal of males relative to females.

The Status of Macrochelys temminckii (Alligator Snapping Turtle) in the Flint River, GA, 22 Years after the Close of Commercial Harvest

The findings suggest that the Alligator Snapping Turtle population in the Flint River has not increased despite 22 years of protection from commercial harvest, and recovery may be hampered by life-history characteristics of the species including delayed maturity and low reproductive output.

Record Size Chelydra serpentina (Snapping Turtle) from Florida's Freshwater Springs

The nature of spring environments, particularly the warm, constant temperatures which facilitate year-round growth appears to be producing record-sized Snapping Turtles in Florida when compared to other Florida localities.

Turtles and Tortoises of the World During the Rise and Global Spread of Humanity: First Checklist and Review of Extinct Pleistocene and Holocene Chelonians.

– We provide a first checklist and review of all recognized taxa of the world’s extinct Pleistocene and Holocene (Quaternary) turtles and tortoises that existed during the early rise and global

A Review of the Fossil Record of Turtles of the Clade Pan-Chelydridae

  • W. Joyce
  • Environmental Science, Geography
    Bulletin of the Peabody Museum of Natural History
  • 2016
Turtles of the total clade Pan-Chelydridae have a relatively sparse fossil record that reaches back to the Late Cretaceous (Santonian) but spread along unclear routes to Asia and Europe during the Paleocene, only to go extinct on those continents by the end of the Pliocene.

Morphological variation in the Mediterranean House Gecko (Gekkonidae: Hemidactylus turcicus) along geographical gradients in the southeastern United States.

Results from this study indicate that morphological variation in H. turcicus is largely homogeneous across its introduced range, and there does appear to be some evidence supporting morphological trends based on longitude, but these findings should be interpreted with caution.

Discovery of an Alligator Snapping Turtle ( Macrochelys temminckii ) Population in Metropolitan Houston, Harris County, Texas

Habitat loss through urbanization is an important threat to many wildlife species. While some species thrive in suboptimal urbanized conditions, many species appear to be incapable of adapting to



Population Structure and Cryptic Evolutionary Units in the Alligator Snapping Turtle

The population structure by river system indicates that many drainages are distinct management units, with the Suwannee River lineage possibly deserving special attention, based on the criterion of genetic distinctiveness.

Phylogeographic uniformity in mitochondrial DNA of the snapping turtle (Chelydra serpentina)

In control‐region sequences of 66 snapping turtles (Chelydra serpentina) collected from 10 south‐eastern states, a single mtDNA haplotype predominated and the two rare variants detected were nearly identical to the common genotype.

Conservation genetics of the alligator snapping turtle: cytonuclear evidence of range-wide bottleneck effects and unusually pronounced geographic structure

Microsatellite data reinforce the conclusion from mtDNA that the Suwannee River population might eventually be recognized as a distinct taxonomic unit, and it was the only population showing fixation or near fixation for otherwise rare microsatellite alleles.


Abstract Historically, the alligator snapping turtle (Macrochelys temminckii Harlan) was heavily collected in Georgia to provide meat to soup canneries. With the exception of previous studies of the

An updated taxonomy of the living Alligator Snapping Turtles ( Macrochelys Gray, 1856), with descriptions of a new tribe, new species and new subspecies

This paper presents a revised and updated taxonomy and nomenclature for the Alligator Snapping Turtles (genus Macrochelys Gray, 1856) of North America.

Complete mitochondrial DNA sequences of the green turtle and blue-tailed mole skink: statistical evidence for archosaurian affinity of turtles.

It is likely that turtles originated from a Permian-Triassic archosauromorph ancestor with two pairs of temporal fenestrae behind the skull orbit that were subsequently lost and the traditional classification of turtles in the Anapsida may need to be reconsidered.

Sequence-based species delimitation for the DNA taxonomy of undescribed insects.

Cataloging the very large number of undescribed species of insects could be greatly accelerated by automated DNA based approaches, but procedures for large-scale species discovery from sequence data


Subadult and adult alligator snapping turtles in Bayou Desiard have similar movement patterns and habitat use and males and females had significant differences in microhabitat use.

The Status of the Turtle Macroclemys floridana Hay

On the basis of four peripheral bones of the turtle Macroclemys, collected from a presumed Pleistocene deposit in Hillsborough County, Florida, Hay (1907) described a new species, floridana. More

Habitats and Movements of Adult Alligator Snapping Turtles in Northeast Louisiana

Home range, habitat use, and daily movements of 11 adult alligator snapping turtles (Macroclemys temmincki) were studied with telemetry in Black Bayou Lake and Bayou Desiard, Ouachita Parish,