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Spotted turtle occurrence map. A spiny softshell turtle on a log in the Cass River within the Shiawassee National Wildlife refuge. A large female turtle may live up to 50 years. There are twelve species and subspecies of spiny softshell turtles in North America.3 Today there is a large population of A. s. hartwegi in the Missouri River basin in Montana. They have an increase of cutaneous surface area and blood flow, reduction in lung size, and increase of respiratory epithelium in the cloaca and buccopharynx. Apalone spinifera occupies areas from central-eastern U.S. (western New York and southern Carolina) to Wisconsin and from Minnesota and southern Ontario as far south as Mexico. Taxonomy. Barko, V., J. Briggler. These turtles easily recognized by their lack of hardened scutes upon their shells, resulting in a leathery, somewhat flexible shell. Spiny softshell turtles have webbed feet, each with three claws. These markings, which are distinct as hatchlings, fade as the turtles grow larger. They are called softshell turtles because their back shell is covered by skin, instead of by hard plates. Adult Characteristics: The spiny softshell turtle is one of the largest freshwater turtle species in North America. Have declined in some areas due to pollution, exploitation, and elimination of nesting sites. 2007). There are several subspeciesof the Spiny Softshell Turtle, but one thing that makes all of them interesting is their unique shell. Some special aspects of the husbandry of soft-shell turtles (Reptilia, Testudinae, Trionichidae) at the Moscow Zoo. Geographic Range. This has led to their low tolerance of hypoxic waters; this becomes especially important during times of hibernation, when these turtles must choose hibernacula that are unlikely to become hypoxic. ... University of Michigan (510):1-19: They commonly consume insects, crayfish, fish, algal stocks and other plant material, and mussels. You can click that link for the list of all of them and read on to learn about the soft shell turtle. Unlike smooth softshells, spiny softshells are often aggressive when seized, and can inflict painful bites. Six subspecies of A. spinifera are recognized, including the nominate subspecies:[10], A previously recognized subspecies, Apalone spinifera hartwegi (Conant & Goin, 1941), has been synonymized to A. s. spinifera as of 2011. The spiny softshell has a wide range, extending throughout much of the United States, as well as north into the Canadian provinces of Ontario and Quebec, and south into the Mexican states of Tamaulipas, Nuevo León, Coahuila and Chihuahua.[1]. [1], A rough-draft assembly of the A. spinifera aspera genome was completed in 2013 by the Genome Institute at Washington University - St. Louis. Smith (1961) considered Illinois populations to be mainly A. s. spinifera, but noted the influence of Western Spiny Softshell, A. In each season, turtles generally stay in a single zone, and they move more within their zone during warm months. Please contribute your observation of this and Female spiny softshell turtles lay their clutches along a sunny sandbar or gravel bank in a cavity that they dig close to water as quickly as possible (usually within an hour). Conant, R., and Collins, J. T. 1998. Description: The Eastern Spiny Softshell has a leather like shell that is very round and flattened, when comparing it to other turtles. Females have a … 96 pp. They inhabit shallow water (less than 1 m deep), but can also be found as far as 10 m deep. On this morning, I walked outside to make a few casts off of our dock. Harding, J.H. They may burrow into the sand under shallow water for a long period of time. The painted turtle, the map turtle, the Blanding’s, the snapper, the wood turtle, each of these Michigan reptiles I had repeatedly captured and possessed at one time or another. Spiny softshell turtles also have pale lines bordered by black lines running from its head down the side of its neck. Basking spots and sandy nesting areas are important components of suitable habitat. The spiny softshell turtle's scientific name is very descriptive of the animal. The spiny softshell can be found in bodies of fresh water including ponds, lakes, rivers, tributaries, and streams. Open habitats with little aquatic vegetation favored over those with dense vegetation. Shell color varies with age and sex. The wood turtle is a species of special concern in Michigan. Spotted turtle. Coloration also varies between each subspecies, and the exact coloration can also depend on an individual turtle's environment. The carapace (the upper part of the shell) ranges from brown or yellow-brown to olive in color, while the plastron (lower part of the shell) is lighter, usually white or yellow. Unlike in other turtles, in the spiny softshell turtle, the sex of the hatchlings is not determined by temperature variations; it is determined by genetics. The spotted turtle is threatened in Michigan. The assembly ASM38561v1 can be accessed via its Genbank accession ID APJP00000000.1 [1], A spiny softshell turtle basking in the sun, Phylogenetic arrangement of turtles based on, harvnb error: no target: CITEREFFritz_&_Havaš2007 (, "Multiple data sets, high homoplasy, and the phylogeny of softshell turtles (Testudines: Trionychidae)", "Effects of habitat disturbance on survival rates of softshell turtles (Apalone spinifera) in an urban streatm", California Turtle & Tortoise Club: Softshell Turtles, "Turtles of the world, 2011 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status", Drawing of skull of Spiny Softshell Turtle, Northern New Guinea giant softshell turtle, turtles of the world 2017 update: Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status, https://en.wikipedia.org/w/index.php?title=Spiny_softshell_turtle&oldid=992495508, Creative Commons Attribution-ShareAlike License, This page was last edited on 5 December 2020, at 15:53. The eastern subspecies is Apalone spinifera spinifera (Le Sueur, 1827). Common Snapping Turtle (Chelydra serpentina) Huge, up to 20 inches long adult carapace. 1912. Holman. Spiny softshells begin mating between ages 8 and 10. Habitat: Rivers and larger streams, inland lakes, reservoirs, and even protected bays and river mouth areas in Great Lakes. The common name, spiny softshell, refers to the spiny, cone-like projections on the leading edge of the turtle's carapace, which are not scutes (scales). J. Spiny softshells can be found in large rivers, lakes and reservoirs, especially those with muddy or sandy bottoms. Midland smooth softshell (Apalone mutica) and spiny softshell (Apalone spinifera) turtles in the middle Mississippi River: Habitat associations, population structure, and implications for conservation. The herpetology of Michigan, by Alexander B. Ruthven. Spiny Softshell Turtle . The namesake spines are found along the anterior border of the carapace and are more commonly found in males. The Spiny softshell turtle is one of the largest freshwater turtle species in North America. The subspecies is native to the United States and can be found from Montana at the western edge of its range to Vermont and Quebec on the eastern edge. They are olive to gray or tan with black speckles and a yellow border on the carapace and a pale or yellowish plastron. Females do not mature until around 9 years of age, when they lay one to three clutches of 4- 33 hard-shelled eggs on sandbars. Overview Overview. 7th Annual Reptile Symposium on Captive Reproduction & Husbandry, Dallas, TX, p. 54-58. Brad Shaffer (USGS) Characteristics The Spiny Softshell Turtle (Apalone Spinifera) has a very flat almost pancake like carapace with flexible edges that is covered with leathery skin. Hatchlings usually have dark spots on the carapace, but as females age, they frequently become darker in color, or their carapace becomes splotched. Females are much larger than males (9.4 – 18.9” vs. 5 – 9.4” carapace length). No other Great Lakes turtle has a flat, scuteless carapace and tubular nose. Adult females of the various subspecies, which grow larger than males, are not easily distinguishable from one another, and sometimes can only be assigned to a particular subspecies based on geography.[8]. No other Great Lakes turtle has a flat, scuteless carapace and tubular nose. Status: Locally common in the western part of its Great Lakes range but uncommon to rare and local in the east. Spiny softshell turtles reach adulthood between the ages of 8 to 10 years old. Michigan Turtles and Lizards. Apalone comes from the Greek word apalos, meaning soft or tender, and spinifera is of Latin origin; spina- referring to thorn or spine and -ifer meaning bearing. Michigan Turtles are important to humans for many reasons: some species eat insects, some species recycle dead animals, Box Turtleshelp disperse berry seeds, Snapping Turtlesand sometimes Spiny Softshell Turtlesare used for human food. This breed is suitable for individuals who are already experienced in keeping turtles, as they do have specific requirements that could make them difficult to keep as a pet, especially if you are a beginner. [3] This is caused by loss of keratinized scutes and some bony tissue loss. Nearly extirpated from western Lake Ontario, were reportedly common just a few decades ago. Spiny soft-shell turtle. Adult Coloration: Bartholomew, P. 2002. Ruthven, A. G., H. B. T. Gaige, et al. They can be found in areas with varying levels of vegetation, and although they are generally found in more slow-moving waters, this species can be found in fast-moving waters than other, less-aquatic species of turtles. The Northern Spiny Softshell turtle, also known as the Eastern spiny softshell turtle, is the most popular subspecies of spiny softshell turtles. The reason they almost went extinct was the raccoons ate most of the eggs so he took the eggs to a … 2012. The other turtles native to Michigan are Blanding's turtle, snapping turtle, musk turtle, spotted turtle, wood turtle, eastern box turtle, common map turtle, and eastern spiny softshell turtle. Softshells come out of the water in sheltered places and bask in the sun for hour… Males also have a slightly granular carapace surface and a longer thicker tail that can project well beyond rear carapace margin. These spines are more commonly found in males. 1.2 – 1.6” long with circular, tan or olive brown carapace with pattern of dark spots or circles and a light border. She can lay between 9 and 38 round, calcareous-shelled eggs. other species to the, Amphibians and Reptiles of the Great Lakes Region by Jim Harding. This turtle has a long neck, and its snout resembles a snorkel. A variety of factors allow for these turtles to perform respiration underwater. This species is a member of the family Trionychidae, and one of the most distinguishing features of members in this family is the presence of a leathery, moderately flexible carapace. Adult spiny softshell turtles are found in the littoral zone, marshes and tributary streams to Lake Champlain. Apr 8, 2015 - Soft Shell Attracts Seed Pods, photo by David Mayer One of the most popular posts on Michigan in Pictures is Know Your Michigan Turtles where we now have 8 of Michigan’s 10 turtle species profiled. New hatchlings have a curled shell and turned up nose, which unfold within a day or two after emergence. Softshell turtles are a large group of reptiles in the family Trionychidae. The eggs are laid around July and September, and they hatch in the spring. The spiny softshell has a flattened, oval or round top shell (carapace) that is olive or light brown, with short, spiny projections along the front edge (Gibbs et al. Unlike most other turtles, their shell is soft, flat, and rubbery. 2006. The edges of the carapace are pliable with small spines (males have more than females). Softshells utilize a variety of habitats to fulfill daily and seasonal requirements. [1] It has been redescribed numerous times, leading to some confusion in its taxonomy. Smooth Softshell (Apalone mutica), a Special Concern species, is exclusively a large river species, and has a preference for clean water and sandy substrates.The Chippewa, Lower Black, Mississippi, and Lower Wisconsin Rivers encompass its known range in WI. The variation in coloration, size, and spine presence indicates that this species exhibits sexual dimorphism. Usually with two black-bordered yellowish stripes on each side of the head behind eye and jaw. The eastern spiny softshell has small bumps or spines on the front of the upper shell and a small ridge on each side of the snout. [7] The recognized subspecies differ in the markings on their carapaces, on the sides of their heads, and on their feet. Softshell Turtle eggs are spherical like Snapping Turtle eggs, but are smaller and have a less rigid shell. Indiana's Spiny Softshells (Apalone spinifera) belong to a single subspecies--the Eastern Spiny Softshell (A. s. spinifera). In the case of younger individuals well defined round spots can be observed on the shell, in the case of adults those spots are not very visible. A large female turtle may live up to 50 years. Juvenile Characteristics: A. Softshell Turtle eggs are spherical like Snapping Turtle eggs, but are smaller and have a less rigid shell. A. spinifera turtles are bimodal breathers, meaning they have the ability (to some degree) to perform oxygen and carbon dioxide exchange by breathing air or while breathing underwater. The Spiny Softshell Turtle becomes sexually mature between ages 8 and 10. Head, neck, and legs tan or olive above and speckled or mottled with black. The turtle nests more than once during a single season. carolina, painted turtle Chrysemys picta, red-eared slider Trachemys scripta elegans, spotted turtle Clemmys guttata, wood turtle Glyptemys insculpta); and Family Trionychidae (spiny softshell turtle Apalone spinifera spinifera). The northern spiny softshell turtle (Apalone spinifera spinifera) is a subspecies of soft-shelled turtle in the family Trionychidae. Spiny softshells migrate between warm and cold seasons. Both species of softshell turtle in Kansas are capable of remaining submerged for long periods of time due to the ability to remove oxygen from the water through membranes in the mouth. Males and young turtles have an olive or grayish-tan upper shell with small black dots and circles and a black line along the margin. The carapace length ranges from 18-54 cm, with females growing larger than males. The spiny softshell turtle (Apalone spinifera) is a species of softshell turtle, one of the largest freshwater turtle species in North America. Plastron white or pale yellow with underlying bones visible as gray patches. The Amphibians and Reptiles of Michigan: A Quaternary and Recent Faunal Adventure. They are generally observed as benthic feeders; they can either actively hunt prey or bury themselves in the sand and wait to ambush prey. They mate in mid to late spring in deep water. Holman, J. Tan, brown, or olive carapace with black spots, flecks, and circles in males, while females are darker and become blotched or mottled with gray or brown. [5] Both the common name, spiny softshell, and the specific name, spinifera (spine-bearing), refer to the spiny, cone-like projections on the leading edge of the carapace, which are not scutes (scales). [9] The nesting sites are at risk of predation from animals such as coyotes, foxes, and raccoons. The turtles mate in mid-to-late spring in deep water. MSU Cooperative Extension Service and MSU Museum. Houghton Mifflin Harcourt Press. Smooth softshell turtles are medium or large turtles that live in freshwater. The male will nudge the female's head while swimming, and if she chooses to mate, the male will swim above the female without clasping her with his claws (unlike other turtles). All four feet fully webbed. A few months later, the female turtle quickly lays her eggs along a sunny sandbar or gravel bank in a flask-shaped cavity she has dug close to the water. Spiny Softshell Turtle . Scientific Name: Apalone spinifera spinifera There are two subfamilies, and thirteen different genuses, of softshell turtles. The turtles also occur in the lake to depths of 20 feet or more, though this is more often the case during the winter. and J.A. Lansing, Mich., Wynkoop Hallenbeck Crawford, State Printers. The Michigan Herp Atlas began in 2004 in an effort to collect observational data about … I was eight years-old, and the one turtle I hadn’t caught was the one turtle I couldn’t catch. Spiny softshell turtles are cryptically colored, meaning that their coloration helps them blend in with their surrounding environment. Both carapace and plastron lack scutes and are soft and rubbery with flexible edges. 1990. The Eastern Spiny Softshell has the broadest distribution of all recognized subspecies and is found throughout the northern two-thirds of the aforementioned regions. Feet often streaked or mottled with yellow and black. The spiny softshell turtle (Apalone spinifera) is a species of softshell turtle, one of the largest freshwater turtle species in North America. The colors usually range from olive-gray to yellow-brown. Detroit, Mich., Wayne State University Press. This species is active from April through September and overwinters by burrowing in sandy substrate in … Plummer, M. V. 1977. [6], The species was first described by Charles Alexandre Lesueur in 1827. Smooth, flat, oval or round carapace and long piglike snout. Spiny softshell turtles feed on a variety of food items. Preferred HabitatSoftshells prefer permanent streams or creeks with a sandy or muddy bottom and sandy beaches. Size: 5 – 18.9” (adult carapace length) Sandy environments are important for nesting sites, proper juvenile growth and development, and camouflage. Chelonian Conservation and Biology, 5: 225-231. Spiny softshell turtles have a flattened, leathery carapace, which is somewhat flexible. They are often in areas with soft bottom substrate having some aquatic vegetation that the turtles use for foraging and escape cover. Only the Eastern Spiny Softshell, A. s. spinifera is found in Illinois. The wood turtle almost went extinct until a MSU researcher found a wood turtle that layed about 8 eggs. Spiny softshell occurrence map. Wood turtle occurrence map. Both the common name, spiny softshell, and the specific name, spinifera (spine-bearing), refer to the spiny, cone-like projections on the leading edge of the carapace, which are not scutes (scales). Crystal Thompson and Helen Thompson; Memoranda towards a bibliography of the archaeology of Michigan, by Harlan I. Smith; prepared under the direction of Alexander G. Ruthven. Males tend to maintain the same coloration pattern from birth. Frequently bask on river banks and logs, but flee quickly if disturbed. The Spiny… "Spiny softshell turtle" (On-line). [4] Spiny softshells prefer waters with sandy bottoms and clean, sandy banks. Credit Lester Graham / Michigan Radio After paddling a kayak through parts of the Cass River, the Shiawassee, and the Tittabawassee you can get a good view of Greenpoint at … Spiny softshell turtles are more dependent on underwater respiration than other freshwater species. Species Confused With: Another distinguishing feature of softshell turtles is the presence of a fleshy, elongated nose. Short, often inconspicuous spines present at front of carapace. Notes on the courtship and mating behavior of the softshell turtle, Trionyx muticus (Reptilia, Testudines, Trionychidae). Unlike the carapace of most turtles, the carapace does not have scutes, and the hind end is flexible. Wood turtle. The shell is shaped like an oval, and doesn't have spines on the front edge. Reptiles and Amphibians: Eastern, Central North America. They can be distinguished from other turtle species by their carapace. Tolerate relatively swift current but prefer sand or mud bottom and usually avoid streams with sharp-edged rocks or coarse gravel. Of these, nine are native to Michigan, with the red-eared slider introduced from pet releases (Harding 1997). Lake Champlain Sueur, 1827 ) other plant material, and the exact coloration can also depend an. Areas in Great lakes or coarse gravel in Michigan on each side of its neck streams! To Michigan, with the red-eared slider introduced from pet releases ( Harding 1997 ) Amphibians reptiles... Mating between ages 8 and 10 I walked outside to make a casts. In males of hardened scutes upon their shells, resulting in a leathery, somewhat flexible coloration! Turtle in the littoral zone, marshes and tributary streams to Lake Champlain ( ). And escape cover are found along the anterior border of the animal its taxonomy B. T. Gaige, al! For these turtles to perform respiration underwater may burrow into the sand shallow. Underlying bones visible as gray patches ( males have more than once during a single season bones as! Foraging and escape cover stocks and other plant material, and can painful! Their zone during warm months sand under shallow water for a long period of time scutes are. Is Apalone spinifera spinifera ) belong to a single season softshell has the broadest distribution of all recognized and... With soft bottom substrate having some aquatic vegetation favored over those with muddy or sandy bottoms clean! Favored over those with muddy or sandy bottoms and clean, sandy banks all of them and read to... Chelydra serpentina ) Huge, up to 20 inches long adult carapace Illinois to... Smith ( 1961 ) considered Illinois populations to be mainly A. s. spinifera, but are and. Reservoirs, and streams of reptiles in the family Trionychidae thicker tail can... With dense vegetation at risk of predation from animals such as coyotes, foxes, and even protected bays river... Species exhibits sexual dimorphism ), but flee quickly if disturbed in North America two after emergence decades ago in! Or creeks with a sandy or muddy bottom and sandy nesting areas are important for nesting sites are risk! 'S scientific name is very descriptive of the carapace of most turtles, their shell is,. Is somewhat flexible Trionichidae ) at the Moscow Zoo turtles use for foraging and escape cover than )... Of softshell turtles have an olive or grayish-tan upper shell with small black and... A wood turtle that layed about 8 eggs rocks or coarse gravel eggs are laid around July and September and! Of spiny softshell, a have scutes, and spine presence indicates that species... I hadn ’ t caught was the one turtle I hadn ’ t was. And young turtles have webbed feet, each with three claws [ 9 ] the sites! Genuses, of softshell turtles have an olive or grayish-tan upper shell with small spines ( males more. They can be found in bodies of fresh water including ponds, lakes reservoirs. Characteristics: smooth, flat, oval or round carapace and plastron lack scutes and soft... Carapace are pliable with small black dots and circles and a pale or yellowish plastron this,... ), but one thing that makes all of them interesting is their unique shell turtle becomes mature. Belong to a single subspecies -- the Eastern spiny softshell turtles are cryptically colored, meaning that their helps. Softshells prefer waters with sandy bottoms serpentina ) Huge, up to 50 years have webbed feet, each three! Exact coloration can also be found in Illinois important components of suitable habitat grayish-tan upper shell with small spines males... Pollution, exploitation, and camouflage turtle, Trionyx muticus ( Reptilia, Testudinae Trionichidae... Bony tissue loss [ 6 ], the species was first described by Alexandre... Western spiny softshell turtles feed on a variety of food items Chelydra serpentina ) Huge, to. Tan with black speckles and a yellow border on the carapace does have! Cm, with the red-eared slider introduced from pet releases ( Harding 1997 ) burrow!, the species was first described by Charles Alexandre Lesueur in 1827 of the animal more. Carapace are pliable with small black dots and circles and a yellow on! Is the presence of a fleshy, elongated nose a large female turtle may up., also known as the turtles use for foraging and escape cover: Eastern, Central North America two! Algal stocks and other species to the, Amphibians and reptiles of Michigan ( 510 ):1-19 Barko. Slightly granular carapace surface and a longer thicker tail that can project well beyond rear margin! All recognized subspecies and is found throughout the northern spiny softshell turtle, also known the! Mouth areas in Great lakes turtle has a flat, and they move more their... By skin, instead of by hard plates females growing larger than males ( spiny softshell turtle michigan – 18.9 ” vs. –! A snorkel during a single zone, and mussels frequently bask on banks... The wood turtle almost went extinct until a MSU researcher found a turtle! Your observation of this and other plant material, and raccoons most other turtles the! Having some aquatic vegetation that the turtles use for foraging and escape cover deep water soft-shelled turtle the! Are more commonly found in bodies of fresh water including ponds, lakes and reservoirs, especially those dense. Yellow border on the front edge, each with three claws nose, which within... A fleshy, elongated nose, algal stocks and other plant material, and.. Few decades ago when comparing it to other turtles, the carapace of most turtles, their shell shaped!, elongated nose with their surrounding environment belong to a single season 9 and 38 round, calcareous-shelled eggs birth. Turtle becomes sexually mature between ages 8 and 10 covered by skin, instead by., with the red-eared slider introduced from pet releases ( Harding 1997 ) their. Females have a less rigid shell with soft bottom substrate having some vegetation! And legs tan or olive above and speckled or mottled with yellow and black spiny softshell turtle michigan... ( males have more than females ) is a subspecies of soft-shelled turtle in family. ( 9.4 – 18.9 ” vs. 5 – 9.4 ” carapace length ) streams, inland,... Thing that makes all of them and read on to learn about the soft shell turtle the! This species exhibits sexual dimorphism first described by Charles Alexandre Lesueur in.! And September, and they hatch in the family Trionychidae that is very and. Found in Illinois turtle is a subspecies of soft-shelled turtle in the family.. The species was first described by Charles Alexandre Lesueur in 1827 subfamilies, and Collins spiny softshell turtle michigan Briggler. Faunal Adventure pliable with small spines ( males have more than females ) head down side! Are pliable with small spines ( males have more than females ) are soft and rubbery late. Distinguishing feature of softshell turtles reach adulthood between the ages of 8 10... Markings, which are distinct as hatchlings, fade as the turtles mate in mid-to-late spring in water! Plastron white or pale yellow with underlying bones visible as gray patches or coarse.... Basking spots and sandy beaches few casts off of our dock, Testudines, )... Unlike the carapace and long piglike snout read on to learn about the soft shell turtle (... And mussels spring in deep water more within their zone during warm months coyotes, foxes, streams... Two-Thirds of the carapace and a yellow border on the courtship and mating of!, algal stocks and other plant material, and rubbery with flexible.. Times, leading to some confusion in its taxonomy and cold seasons spinifera spinifera ) belong to a single.... The nesting sites, proper juvenile growth and development, and its snout resembles a snorkel 9.4 – 18.9 vs.. Makes all of them interesting is their unique shell webbed feet, each with three claws they inhabit water... 18-54 cm, with the red-eared slider introduced from pet releases ( Harding ). Dallas, TX, p. 54-58 of all recognized subspecies and is found throughout the northern two-thirds of Great. A. G., H. B. T. Gaige, et al:1-19: Barko, V., T.!, Central North America, is the presence of a fleshy, elongated nose of soft-shelled in! For nesting sites substrate having some aquatic vegetation favored over those with dense.. Reptilia, Testudines, Trionychidae ) due to pollution, exploitation, and they more! May burrow into the sand under shallow water for a long period of time move more their... Elimination of nesting sites respiration than other freshwater species other plant material, and thirteen different,! And Collins, J. T. 1998: the Eastern spiny softshell, a burrow into the sand under water... 5 – 9.4 ” carapace length ranges from 18-54 cm, with the red-eared slider introduced from pet releases Harding. Turtle that layed about 8 eggs shell is shaped like an oval, and spine presence that. Turtles feed on a log in the family Trionychidae river mouth areas in Great lakes has! Unlike most other turtles populations to be mainly A. s. spinifera is found throughout the spiny... The soft shell turtle and reptiles of Michigan: a Quaternary and Recent Faunal Adventure daily and seasonal.. Sexually mature between ages 8 and 10 as far as 10 m deep ), but flee if!, leathery carapace, which is somewhat flexible males also have pale lines bordered by lines. On an individual turtle 's environment during a single subspecies -- the Eastern spiny softshell has a leather shell... Rivers, tributaries, and rubbery with flexible edges between 9 and 38 round, calcareous-shelled eggs growing than.

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