- , 1976
- Nachzucht in der zweiten Generation von Staurotypus salvinii mit weiteren Beobachtungen zum Fortpflanzungsverhalten (Testudines, Kinosternidae). Salamandra 12: 5-16.
- Saint-Girons 1991
- Histologie comparée des fosses nasales de quelques tortues marines (Dermochelys coriacea et Chelonia mydas) et d'eaux douces (Emys orbicularis et Pseudemys scripta) (Reptilia, Dermochelydae, Cheloniidae, Emydidae). Bijd. Dierk. Hague 61: 51-61.
- Samour 1987
- A survey of the Aldabra giant tortoise populations introduced on Curieuse Island, Seychelles. Biol. Conserv. 41: 147-158.
- Sampaio 1971
- A karyological study of two species of tortoises from the Amazon Region of Brazil. Cytologia (Tokyo) 36: 199-204.
- Sanchez-Villagra 1995
- Geographic variation in the matamata turtle, Chelus fimbriatus, with observations on its shell morphology and morphometry. Chelonian Conserv. Biol. 1(4): 293-300.
- Santhuff, 1990
- Graptemys barbouri. Catalog. Amer. Amphib. Rept. 421: 1-2.
- Sarker, 1996
- Population, eco-biological status, captive propagation and conservation problems of Lissemys punctata in Bangladesh. In: B. Devaux (ed.), Proceedings—International Congress of Chelonian Conservation, pp. 43-45. Gonfaron, France: Editions SOPTOM
- Sarma 1988
- A new record of the Assam roofed turtle Kachuga sylhetensis (Jerdon) from the Manas Wildlife Sanctuary, Assam. J. Bombay Nat. Hist. Soc. 85: 623.
- , Itoh 1967
- Preliminary notes on the karyotype of two species of turtles, Clemmys japonica and Geoclemys reevesii. Chromosome Infor. Serv. (8): 21-22.
- Satyamurti 1962
- Guide to the lizards, crocodiles, turtles and tortoises in the reptile gallery. Madras Gov't. Mus. Madras, India. 45 pp.
- Saxena 1994
- Captive husbandry of the Malayan box turtle (Cuora amboinensis) from the Nicobar Islands. Hamadryad 19: 93-94.
- Schamberger, 1986
- The application of habitat modeling to the desert tortoise (Gopherus agassizii) Herpetologica 42: 134-138.
- , 1844
- Over de Schildpadden van den Indischen Archipal., beschrijving einer nieuwe soort van Sumatra. In: C. J. Temminck, Verhandelingen over de Natuurlijke Geschiedenis der Nederlandsche Overzeesche Bezittingen, 1839-44. Zool., pt. 3, Reptilia, pp. 29-36.
- Schleich 1996
- Beitrag zur Systematik des Formenkreises von Mauremys leprosa (Schweigger) in Marokko. Teil I. (Reptilia, Chelonii, Emydidae). Spixiana Suppl. 22: 29-59.
- Schleich 1996
- Amphibians and reptiles of North Africa: biology, systematics, field guide. Koeltz Scientific Books, Koenigstein, Germany. 627 pp.
- Schleich, 1984
- Eine neue Grosskopfschildkröte, Platysternon megacephalum tristernalis nov. ssp., aus Yunnan, China. Spixiana 7: 67-73.
- Schmalz, 1994
- Malacochersus tornieri: Beobachtungen bei Haltung und Nachzucht. Salamandra 30: 12-21.
- , Owens 1944
- Amphibians and reptiles of northern Coahuila, Mexico. Zool. Ser. Field Mus. Natur. Hist. 29: 97-115.
- Schoepff 1792-1801
- Historia Testudinum iconibus illustrata. Palm, Erlangae. 136 pp. [Latin version of Naturgeschichte der Schildkröten mit Abbildungen erlautert. Palm, Erlangen. 160 pp. 1792: 1-32; 1793: 33-88; 1795: 89-136; 1801: 137-160.]
- Schomburgk 1848
- Reisen in British Guiana in... 1840-1844. I. Fauna. Amphibien, pp. 645-661. Leipzig.
- , 1975
- A check-list of West Indian amphibians and reptiles. Carnegie Mus. Natur. Hist. Spl. Publ. (1): 1-216.
- Schweigger 1812
- Monographiae Cheloniorum. Königsberg. Arch. Naturwiss. Math. 1: 271-368, 406-458.
- Schweigger 1814
- Prodromi monographie cheloniorum. Regiomonti. 58 pp.
- , Koons 1994
- Macroclemys temminckii (alligator snapping turtle). Reproduction. Herpetol. Rev. 25: 64.
- Scribner 1995
- Factors contributing to temporal and age-specific genetic variation in the freshwater turtle Trachemys scripta. Copeia
- Seeliger 1945
- Variation in the Pacific mud turtle. Copeia
- Seidel 1994
- Morphometric analysis and taxonomy of cooter and red-bellied turtles in the North American genus Pseudemys (Emydidae). Chelonian Conservation Biol. 1: 117-130.
- Seidel 1978
- Kinosternon flavescens. Catalog. Amer. Amphib. Rept. 216: 1-4.
- Seidel 1988
- Revision of the West Indian emydid turtles (Testudines). Amer. Mus. Novitates (2918): 1-41.
- Seidel 1981
- A taxonomic analysis of pseudemyd turtles (Testudines: Emydidae) from the New River and phenetic relationships in the subgenus Pseudemys. Brimleyana (6): 25-44.
- Seidel 1995
- How many species of cooter turtles and where is the scientific evidence?--A reply to Jackson. Chelonian Conservation Biol. 1: 333-336.
- Seidel 1990
- Growth and population characteristics of the slider turtle, Trachemys decussata, on Grand Cayman Island. J. Herpetol. 24(2): 191-196.
- Seidel, Ernst 1998
- Pseudemys peninsularis. Catalog. Amer. Amphib. Rept. 669: 1-4.
- Seidel, Ernst 1996
- Pseudemys. Catalog. Amer. Amphib. Rept. 625: 1-5.
- Seidel, 1986
- Chrysemys, Pseudemys, Trachemys (Testudines: Emydidae): Did Agassiz have it right? Herpetologica 42: 242-248.
- Seidel, 1987
- Biochemical comparisons among West Indian Trachemys (Emydidae: Testudines). Copeia
- Seidel, 1989
- Variation in turtle myoglobins (subfamily Emydinae: Testudines) examined by isoelectric focusing. Comp. Biochem. Physiol. 94B: 569-573.
- Seidel, Dreslik 1996
- Pseudemys concinna. Catalog. Amer. Amphib. Rept. 626: 1-12.
- Seidel, Lucchino 1981
- Allozymic and morphological variation among the musk turtles Sternotherus carinatus, S. depressus, and S. minor (Kinosternidae). Copeia
- Seidel, Inchaustegui Miranda 1984
- Status of the trachemyd turtles (Testudines: Emydidae) on Hispaniola. J. Herpetol. 18: 468-479.
- Seidel, 1980
- Aspects of evaporative water loss in the mud turtles Kinosternon hirtipes and Kinosternon flavescens. Comp. Biochem. Physiol. 67A: 593-598.
- Seidel, 1997
- Courtship behavior provides additional evidence for a monophyletic Pseudemys, and comments on Mesoamerican Trachemys (Testudines: Emydidae). Herpetol. Rev. 28: 70-72.
- Seidel, 1991
- Morphological variation in turtles of the genus Pseudemys (Testudines: Emydidae) from central Atlantic drainages. Brimleyana (17): 105-135.
- Seidel 1986
- Biochemical comparisons and phylogenetic relationships in the family Kinosternidae (Testudines). Copeia
- Seidel 1981
- Phylogenetic relationships among musk turtles (Genus Sternotherus) and genic variation in Sternotherus odoratus. Herpetologica 37: 161-165.
- 1984
- Parameters of two populations of diamondback terrapins (Malaclemys terrapin) on the Atlantic Coast of Florida. In: R. A. Seigel, L. E. Hunt, J. L. Knight, L. Malaret, and N. L. Zuschlag (eds.), Vertebrate ecology and systematics: a tribute to Henry S. Fitch, pp. 77-87. Univ. Kansas Mus. Nat. Hist. Spec. Publ. 10.
- Sexton 1960
- Notas sobre la reproducción de una tortuga Venezolana, la Kinosternon scorpioides. Soc. Cienc. Natur. LaSalle Mem. 20: 189-197.
- Sexton 1959
- Spatial and temporal movements of a population of the painted turtle, Chrysemys picta marginata (Agassiz). Ecol. Monogr. 29: 113-140.
- Shaffer 1997
- Tests of turtle phylogeny: molecular, morphological and paleontological approaches. Syst. Biol. 46: 235-268.
- Shaffer, Ernst 1979
- The giant land tortoise of Aldabra, Geochelone gigantea. Bull. Maryland Herpetol. Soc. 15: 46-55.
- Shaver 1992
- Lepidochelys kempii (Kemp's ridley sea turtle). Reproduction. Herpetol. Rev. 23: 59.
- , 1793
- Zoology and Botany of New Holland and the Isles Adjacent. London
- Shealy 1976
- The natural history of the Alabama map turtle, Graptemys pulchra Baur, in Alabama. Bull. Florida St. Mus. Biol. Sci. 21: 47-111.
- Shipman 1993
- Natural history of the alligator snapping turtle (Macroclemys temminckii) in Kansas. Kansas Herpetol. Soc. Newsl. 93: 14-17.
- Shively, 1985
- Factors limiting the upstream distribution of the Sabine map turtle. Amer. Midl. Nat. 114: 292-303.
- Shoop 1967
- Graptemys nigrinoda in Mississippi. Herpetologica 23: 56.
- Siaca, Fritts 1995
- Patrines de cercimiento de las tortugas gigantes (Geochelone ephippium) de la Isla de Pinzón, Galagagos. Rev. Acad. Colomb. Cienc. 19: 741-744.
- Siaca-Colon 1994
- Patterns of growth and maturation in giant tortoises from Pinzón and Española islands, Galapagos, Ecuador. M. S. thesis, George Mason Univ., Fairfax.
- Siebenrock 1906a
- Schildkröten von Ostafrika and Madagaskar. In: A. Voeltzkow, Reise in Ostafrika in den Jahren 1903-1905, 2: 1-40. Stuttgart.
- Siebenrock 1909
- Synopsis der rezenten Schildkröten mit Berücksichtigung der in historischer Zeit ausgestorbenen Arten. Zool. Jahrb., suppl. 10: 427-618.
- Siebenrock 1903a
- Schildkröten des ostlichen Hinterindien. Sitz. Acad. Wiss. Wien. Math.-natur. Kl. 112: 333-353.
- Siebenrock 1901
- Beschreibung einer neuen Schildkrötengattung aus der Familie Chelydidae von Australien: Pseudemydura. Anz. Akad. Wiss. Wien. 22: 248-250.
- Siebenrock 1907
- Über einige, zum Teil seltene Schildkröten aus Südchina. Sitz. Acad. Wiss. Wien. Math.-natur. Kl. 116: 1741-1776.
- Siebenrock 1903b
- Über zwei seltene und eine neue Schildkröte des Berliner Museum. Sitz. Akad. Wiss. Wien. Mathnatur. Kl. 112: 439-445.
- Siebenrock 1906b
- Zur Kenntnis der Schildkrötenfauna der Insel Hainan. Zool. Anz. 30: 578-586.
- Siebenrock 1914
- Eine neue Chelodina- Art aus Westaustralien. Anz. Akad. Wiss. Wien 17: 386-387.
- Siebenrock 1906c
- Eine neue Cinosternum- Art aus Florida. Zool. Anz. 30: 727-728.
- Sites 1984
- Biochemical characters and the reconstruction of turtle phylogenies: Relationships among batagurine genera. Syst. Zool. 33: 137-158.
- , Lovich 1995
- Exploitation of the alligator snapping turtle, Macroclemys temminckii, in Louisiana: a case study. Chelonian Conserv. Biol. 1: 221-222.
- , Rhodin 1986
- Authorship of the scientific name of the leatherback sea turtle. J. Herpetol. 20(3): 450-451.
- , Glass 1947
- A new musk turtle from southeastern United States. J. Washington Acad. Sci. 37: 22-24.
- , 1950
- Type localities of Mexican reptiles and amphibians. Univ. Kansas Sci. Bull. 33: 313-380.
- , Ramsey 1952
- A new turtle from Texas. Wasmann J. Biol. 10: 45-54.
- Snell 1995
- Geographical characteristics of the Galápagos Islands. Noticias de Galápagos 55: 18-24.
- Soini 1996
- Reproducion, abundancia y situacion de quelonios acuaticos en la Reserva Nacional Pacaya-Samiria, Peru. Folia Amazonica 8: 147-164.
- Soini 1994
- Ecologia reproductiva de la taricaya (Podocnemis unifilis) en el Rio Pacaya, Peru. Folia Amazonica 6: 105-124.
- Sonnini, 1802
- Histoire naturelle des reptiles avec figures dessinées d'apres nature. I. Deterville, Paris. 280 pp.
- , 1995
- Observations on feeding habits of Hydromedusa maximiliani (Testudines: Chelidae) in southeastern Brazil. Chelonian Conserv. Biol. 1: 320-322.
- , 1994
- Incubation temperature influences sex and hatchling size in the neotropical turtle Podocnemis unifilis. J. Herpetol. 28(4): 453-464.
- Spence 1979
- The western Australian swamp tortoise Pseudemydura umbrina. Int. Zool. Yearb. 19: 58-60.
- Spotila 1996
- Worldwide population decline of Dermochelys coriacea: are leatherback turtles going extinct? Chelonian Conserv. Boil. 2(2): 209-222.
- Sprando, 1988
- Spermiogenesis in the red-ear turtle (Pseudemys scripta) and the domestic fowl (Gallus domesticus): a study of cytoplasmic events including cell volume changes and cytoplasmic elimination. J. Morphol. 198: 95-118.
- Srinarumol 1995
- Population Biology of the Malayan Snail-eating Turtle Malayemys subtrijuga (Schlegel & Müller, 1844). Unpublished M. Sc. thesis, Chulalongkorn University, Bangkok. 126 pp.
- Stebbins 1985
- A field guide to western reptiles and amphibians. 2nd ed. Houghton Mifflin Co., Boston. 336 pp.
- Stejneger 1925b
- New species and subspecies of American turtles. J. Washington Acad. Sci. 15: 462-463.
- Stejneger 1944
- Notes on the American soft-shell turtles with special reference to Amyda agassizii. Bull. Mus. Comp. Zool. Harvard 94: 1-75.
- Stejneger 1902
- Some generic names of turtles. Proc. Biol. Soc. Washington 15: 235-238.
- Stejneger 1925a
- Chinese amphibians and reptiles in the United States National Museum. Proc. U. S. Natl. Mus. 66: 1115.
- Stejneger 1918
- Description of a new snapping turtle and a new lizard from Florida. Proc. Biol. Soc. Washington 31: 89-92.
- Stejneger 1909
- Generic names of some chelyid turtles. Proc. Biol. Soc. Washington 22: 125-128.
- Stejneger, 1939
- A check list of North American amphibians and reptiles. 4th ed. Harvard Univ. Press, Cambridge, Massachusetts.
- Sternberg 1981
- The worldwide distribution of sea turtle nesting beaches. Sea Turtle Rescue Fund, Center Environ. Ed., Washington, D.C.
- Stickel 1950
- Population and home range relationships of the box turtle, Terrapene c. carolina (Linnaeus). Ecol. Monogr. 20: 351-378.
- Stimson 1986
- On the correct zoological name of the Australasian turtle genus Emydura Bonaparte. J. Herpetol. 20: 279-280.
- Stoddart 1982
- Tortoises and tourists in the western Indian Ocean: The Curieuse Experiment. Biol. Conserv. 24: 67-80.
- Stoneburner 1980
- Body depth: an indicator of morphological variation among nesting groups of adult loggerhead sea turtles (Caretta caretta). J. Herpetol. 14: 205-206.
- Stang 1983
- Spatial and temporal activity patterns in two terrestrial turtles. J. Herpetol. 17: 43-47.
- Strauch 1890
- Bemerkungen über die Schildkrötensammlung im Zoologischen Museum. Mem. Acad. St. Petersburg (7)38: 1-127.
- Strecker 1927
- Observations on the food habitats of Texas amphibians and reptiles. Copeia
- Street 1979
- The reptiles of northern and central Europe. B. T. Batsford Ltd., London. 268 pp.
- , Painter 1997
- Trachemys gaigeae (Big Bend slider). Reproduction. Herpetol. Rev. 28: 149-150.
- , 1987
- The eastern box turtle, Terrapene c. carolina (Testudines: Emydidae), in North Carolina. Brimleyana 13: 123-131.
- Surface 1908
- First report on the economic features of the turtles of Pennsylvania. Zool. Bull. Div. Zool. Pennsylvania Dept. Agric. 6: 105-196.
- Swindells, 1964
- Ability of Testudo elongata to withstand excessive heat. British J. Herpetol. 3: 166.
- Swingland 1989a
- Geochelone elephantopus. Galapagos giant tortoise. In: I. R. Swingland, and M. W. Klemens (eds.). The Conservation Biology of Tortoises, pp. 24-28. Occ. Pap. IUCN/SSC 5, Tortoise and Freshwater Specialists Group. IUCN, Gland, Switzerland.
- Swingland 1989b
- Geochelone gigantea. Aldabra giant tortoise. In: I. R. Swingland, and M. W. Klemens (eds.). The Conservation Biology of Tortoises, pp. 105-110. Occ. Pap. IUCN/SSC 5, Tortoise and Freshwater Specialists Group. IUCN, Gland, Switzerland.
- Swingland, 1978
- The natural regulation of giant tortoise populations on Aldabra Atoll. Reproduction. J. Zool. (London) 186: 285-309.
- Swingland, 1979
- The natural regulation of giant tortoise populations on Aldabra Atoll: recruitment. Phil. Trans. Royal Soc. London, B 286: 177-188.
- Swingland, Klemens 1989
- The conservation biology of tortoises. Occ. Pap. IUCN Species Surv. Comm. 5: 1-202.