taxonID	type	description	language	source
03D787A6FFC4FFD7FF34F95790FAC122.taxon	materials_examined	Holotype. MNHN-AC A. 4540, “ collected near Memphis ” (skull also figured in Bour 1987). (Western lineage; Figure 9). Amended diagnosis. Carapacial caudal notch narrow and triangular or U-shaped, contained wholly on the pygal and not extending onto peripheral set 11, and pygal with two serrations and without medial suture; Peripheral 11 with 1 serration; pleural scute set 1 does not overlap onto the nuchal; distal rib end of costal 1 enters middle of peripheral 3; posterior projection of the squamosal globular and obtusely angled in lateral aspect, usually upwardly inflected; dermal scale on the frontals reduced in size; processus trochlearis oticum relatively straight with a single distal protuberance; posterior margin of squamosal-opisthotic contact relatively straight in dorsal aspect; mandible relatively narrow with slender triturating surfaces. Although generally the caudal notch is small and triangular, observable variation occurs within the species.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC5FFD4FF34FAC8902AC6B1.taxon	materials_examined	Holotype. UF 166146, adult male skeleton from Santa Fe River and State Road 235, Alachua County, Florida (29.87872 o N, 82.33619 o W, datum WGS 84, elev. 23 m), found dead, apparently from gunshot wounds, in very low water in 2003 by Jason R. Bourque (see Figures 10, 11, 12). (Suwannee lineage; Figure 9). Paratypes. UF 22267, partial skeleton from Santa Fe River, near Town of Santa Fe, Alachua County, Florida, on 9 April 1962 by George R. Zug; UF 12694, partial skeleton from Fletcher Spring, Lafayette County, Florida (29.84672 o N, 82.89256 o W, elev. 9 m), on 19 November 1961 by B. Sites, D. Desautels, and D. Young.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC5FFD4FF34FAC8902AC6B1.taxon	diagnosis	Diagnosis. Macrochelys suwanniensis is distinguished by the following: carapacial caudal notch very wide and lunate (Figure 10), usually comprising the pygal and peripheral set 11 (shared with Chelydra); pygal sutured medially (composed of two bones) often with no serrations; Peripheral 11 with 1 – 2 serrations; distal rib end of costal 1 enters posterior third of peripheral 3; pleural scute set 1 with broad overlap onto the nuchal; dermal scale on the frontals very wide; processus trochlearis oticum with developed proximal and distal protuberances; squamosal contacts opisthotic anteriorly when viewed in dorsal aspect; mandible broad with expanded triturating surfaces and developed labial rugosity just anterior to the coronoid; posterior projection of the squamosal acutely angled in lateral aspect, dorsally straight or downwardly directed, and posteriorly extensive past the plane of the quadrate (Figure 11).	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC5FFD4FF34FAC8902AC6B1.taxon	discussion	Comments. Most carapaces of Macrochelys suwanniensis exhibited a medially sutured pygal. This feature is significant when considering caudal notch width and is likely at least part of the reason this species possesses the widest caudal notch amongst congeners. The extra suture may allow the caudal notch to expand as the turtle grows larger. This is in contrast to M. temminckii, which possesses a single unsutured pygal bone and consequently the narrowest caudal notch of extant Macrochelys. Peripheral 11 is usually doubly serrated; i. e., the serrations that are typically contained on the pygal bone in the western and central species have migrated onto the 11 th peripheral set in M. suwanniensis.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC5FFD4FF34FAC8902AC6B1.taxon	distribution	Distribution. Restricted to the Suwannee River drainage in Florida and Georgia.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC5FFD4FF34FAC8902AC6B1.taxon	etymology	Etymology. Specific epithet refers to combination of the new Latin suwanni – (referring to the Suwannee River) and the Latin – ensis (belongs to the) to form the composite noun suwanniensis. Specimens examined. See Appendix.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC6FFCDFF34F89292AFC682.taxon	materials_examined	Holotype. UF 3998, partial skeleton from the Apalachicola River, Gadsden County, Florida, on 4 April 1953 by the Florida Museum of Natural History (see Figures 13, 14). (Central lineage; Figure 9). Paratypes. UF 52676, partial skeleton from Waddells Mill Creek, Jackson County, Florida, on 10 April 1978 by L. Richard Franz et al.; UF 152479 skull from Econfina Creek, Bay County, Florida (30.15274 o N, 85.55748 o W, elev. 2 m, 13.1 m depth), on 21 August 1982 by Joseph P. Ward and Joseph J. Ward.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC6FFCDFF34F89292AFC682.taxon	diagnosis	Diagnosis. Macrochelys apalachicolae is distinguished by the following: carapacial caudal notch narrow and triangular or narrow and U-shaped (Figure 13), relatively shallow, and reduced; posterior projection of the squamosal globular and obtusely angled in lateral aspect (Figure 5,14); pygal with two serrations, with medial suture; peripheral 11 with one serration; distal rib end of costal 1 enters posterior third of peripheral 3; pleural scute set 1 with slight to no overlap onto the nuchal; processus trochlearis oticum relatively straight with a single distal protuberance; posterior margin of squamosal-opisthotic contact relatively straight in dorsal aspect.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC6FFCDFF34F89292AFC682.taxon	discussion	Comments. Although there is a general pattern of small triangular pygal regions of the carapace, there is observable variation within the species. All cranial specimens are characterized by large, globular squamosal projections that are intermediate between those of M. suwannensis and M. temminckii. Although M. apalachicolae is genetically most similar to M. temminckii, in some ways it is morphologically more similar to M. suwanniensis; they share the unique synapomorphy of a sutured pygal. Macrochelys apalachicolae is somewhat morphologically intermediate between M. temminckii and M. suwannensis with regard to carapacial caudal notch proportions. The degree of overlap of pleural 1 onto the nuchal also suggests this (usually lying on or just anterior to the nuchalcostal 1 suture), as does a pygal that possesses two serrations (a western character) that is typically sutured medially (a character found in M. suwannensis).	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC6FFCDFF34F89292AFC682.taxon	distribution	Distribution. Restricted to river drainages bounded by the Choctawhatchee and Ochlockonee rivers in Florida, Georgia, and Alabama.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
03D787A6FFC6FFCDFF34F89292AFC682.taxon	etymology	Etymology. Specific epithet refers to the new Latin apalachicol – (referring to the Apalachicola River) and the Latin – ae (treating the name of the river as a Latin cognate in the First Declension, genitive case), combined to form the composite noun apalachicolae. Fossil record. The earliest fossil representatives of Macrochelys in Florida are from the early Miocene, early Barstovian NALMA, ca. 15 – 16 Ma. These fossils are fragmentary and consist of a partial costal 8 (UF-Vertebrate Paleontology [VP] 259076) and partial hyo- and hypoplastron (UF-VP 259077). Although difficult to ascribe to the species level, they are contemporaneous with Macrochelys stricta (Matthew 1924) from the early Barstovian of Nebraska.	en	Thomas, Travis M., Granatosky, Michael C., Bourque, Jason R., Krysko, Kenneth L., Moler, Paul E., Gamble, Tony, Suarez, Eric, Leone, Erin, Enge, Kevin M., Roman, Joe (2014): Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: Macrochelys), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141-165, DOI: 10.11646/zootaxa.3786.2.4
