The eastern mud turtle (''Kinosternon subrubrum'') or common mud turtle
is a common
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of
turtle
Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked t ...
in the
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Kinosternidae
The Kinosternidae are a family of mostly small turtles that includes the mud turtles and musk turtles. The family contains 25 species within four genera, but taxonomic reclassification is an ongoing process, so many sources vary on the exact num ...
. The species is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
to the United States. There are two recognized
subspecies.
Description
The eastern mud turtle is a small and often hard to identify species. It measures in
carapace length. The carapace is keelless, lacks any pattern, and varies in color from yellowish to black. The
plastron is large and double hinged, and can be yellowish to brown, and may sometimes have a dark pattern. The chin and throat are a yellowish grey, streaked and mottled with brown, while the limbs and tail are grayish. The eye, or
iris
Iris most often refers to:
*Iris (anatomy), part of the eye
*Iris (mythology), a Greek goddess
* ''Iris'' (plant), a genus of flowering plants
* Iris (color), an ambiguous color term
Iris or IRIS may also refer to:
Arts and media
Fictional ent ...
, of the eastern mud turtle is yellow with dark clouding, and its feet are webbed.
Diet
The eastern mud turtle is omnivorous and feeds on insects, crustaceans, mollusks, amphibians, carrion, and aquatic vegetation. Smaller eastern mud turtles prey on small aquatic insects, algae, and carrion, whereas larger ones can feed on any type of food
Movement
Eastern mud turtles have been documented to migrate seasonally from uplands that they frequent to wetlands and aquatic movement in their home ranges.
Habitat
Mud turtles (
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
''
Kinosternon
''Kinosternon'' is a genus of small aquatic turtles from the Americas known commonly as mud turtles.
Geographic range
They are found in the United States, Mexico, Central America, and South America. The greatest species richness is in Mexico, a ...
'') are fresh water turtles that are found in the Southeastern and Northeastern United States.
They live in rivers, lakes and swamps. Mud turtles prefer ponds that have a lot of vegetation. These animals can generally be found in spring-fed streams, and they prefer clean, oxygenated water. The Eastern mud turtle rarely basks, but in the instance they do, they will bask on rocks or debris floating on the surface of the water.
In the wild, they also prefer sandy and muddy areas, as they will hibernate by burrowing into the mud. The Eastern Mud Turtle prefers hibernacula sites about 70 meters from wetlands and that have a large amount of leaf and pine litter and not too much tree cover. They will burrow at the wetland edges at a minimum depth of 1.3 cm below the soil surface to a maximum depth of 3 cm.
[ The leaf litter helps to keep the soil moisture and the temperature consistent, while a more open canopy exposes turtles to higher temperatures before emergence.
Mud turtles can tolerate brackish water so they may be found near salt marshes and on coastal islands.][
]
Reproduction
Mating occurs in ''K. subrubrum'' during early spring followed by egg laying in May to early June. Clutch sizes vary from 2 to 5. Clutch size increases as female plastron length increases and they have at least 3 clutches/year.
Reproduction in this species varies greatly depending on latitudinal location. Clutches per year for this species have been reported to be one clutch per year in some states and multiple clutches in others. In a study conducted in South Carolina, clutch frequency in warmer areas averaged multiple clutches, but two clutches per year were the approximate average in cooler regions of the state.[ The incubation period of the eggs can range from 76 to 124 days. ''K. subrubrum'' hatchlings have a wider carapace than the width of the eggs they hatch from, indicating that the carapace unfolds immediately upon hatching.]
Geographic range
The eastern mud turtle is found in the US states of Alabama
(We dare defend our rights)
, anthem = "Alabama"
, image_map = Alabama in United States.svg
, seat = Montgomery
, LargestCity = Huntsville
, LargestCounty = Baldwin County
, LargestMetro = Greater Birmingham
, area_total_km2 = 135,765 ...
, Arkansas
Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the O ...
, Delaware
Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
, Florida
Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
, Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the Caucasus region of Eurasia
* Georgia (U.S. state), a state in the Southeast United States
Georgia may also refer to:
Places
Historical states and entities
* Related to the ...
, Illinois
Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Rockf ...
, Indiana
Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...
, Kentucky
Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illinois, Indiana, and Ohio to the north; West Virginia and Virginia ...
, Louisiana
Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...
, Maryland
Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...
, Mississippi
Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...
, Missouri
Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t ...
, New Jersey
New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
, New York, North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and ...
, Oklahoma, Pennsylvania
Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
, South Carolina
)'' Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no)
, anthem = " Carolina";" South Carolina On My Mind"
, Former = Province of South Carolina
, seat = Columbia
, LargestCity = Charleston
, LargestMetro = ...
, Tennessee
Tennessee ( , ), officially the State of Tennessee, is a landlocked state in the Southeastern region of the United States. Tennessee is the 36th-largest by area and the 15th-most populous of the 50 states. It is bordered by Kentucky to th ...
, Texas
Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...
, and Virginia
Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
.
In Indiana, the eastern mud turtle is listed as an endangered species.
Diseases
In 2014 on the Savannah River Site in Aiken, South Carolina the first case of ranavirus in an eastern mud turtle was detected. This virus affects amphibians, fish, and reptiles and causes oral plaque, ulceration, and conjunctivitis in infected species eventually resulting in death.
Subspecies
Two subspecies are recognized as being valid, including the nominotypical subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...
.["''Kinosternon subrubrum'' ". The Reptile Database. www.reptile-database.org.]
*''K. s. subrubrum'' – eastern mud turtle ( nominate subspecies)
*''K. s. hippocrepis'' – Mississippi mud turtle
The former subspecies, ''K. s. steindachneri'' – Florida mud turtle, was elevated to species status in 2013.
''Nota bene
(, or ; plural form ) is a Latin phrase meaning "note well".
It is often abbreviated as NB, n.b., or with the ligature
and first appeared in English writing . In Modern English, it is used, particularly in legal papers, to draw the atten ...
'': A trinomial authority in parentheses indicates that the subspecies was originally described in a genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
other than ''Kinosternon''.
References
Further reading
* Behler JL, King FW (1979). ''The Audubon Society Field Guide to North American Reptiles and Amphibians''. New York: Knopf. 742 pp. . (''Kinosternon subrubrum'', pp. 441–442 + Plates 318, 320, 321).
* Bonnaterre PJ (1789). ''Tableau encyclopédique et méthodique des trois règnes de la nature, Erpétologie.'' Paris: Panckoucke. xxviii + 71 pp. + 66 plates. (''Testudo subrubra'', new species, pp. 27–28 + urtlesPlate 5, figure 1). (in French and Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
).
* Boulenger GA (1889). ''Catalogue of the Chelonians, Rhynchocephalians, and Crodcodiles in the British Museum (Natural History). New Edition.'' London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). x + 311 pp. + Plates I-III. (''Cinosternon pensylvanicum'', pp. 39–40).
* Conant R (1975). ''A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition''. Boston: Houghton Mifflin. xviii + 429 pp. + Plates 1-48. (hardcover), (paperback). (''Kinosternon subrubrum subrubrum'', p. 43 + Plates 4, 5 + Map 13).
* Goin CJ, Goin OB, Zug GR (1978). ''Introduction to Herpetology, Third Edition''. San Francisco: W.H. Freeman. xi + 378 pp. . (''Kinosternon s. subrubrum'', detailed description of nesting, p. 264).
* Powell R, Conant R, Collins JT (2016). ''Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America, Fourth Edition''. Boston and New York: Houghton Mifflin Harcourt. xiv + 494 pp., 47 color plates 207 figures. . (''Kinosternon subrubrum'', pp. 225–227, Figure 102 + Plates 19, 21).
* Smith HM, Brodie ED Jr (1982). ''Reptiles of North America: A Guide to Field Identification''. New York: Golden Press. 240 pp. . (''Kinosternon subrubrum'', pp. 26–27).
* Stejneger L, Barbour T (1917). ''A Check List of North American Amphibians and Reptiles''. Cambridge, Massachusetts: Harvard University Press. 125 pp. (''Kinosternon subrubrum subrubrum'', p. 112).
* Zim HS, Smith HM (1956). ''Reptiles and Amphibians: A Guide to Familiar American Species: A Golden Nature Guide''. New York: Simon and Schuster. 160 pp. (''Kinosternon subrubrum subrubrum'', pp. 19, 23, 155).
External links
Eastern mud turtle - ''Kinosternon subrubrum''
Species account from the Towson University Reptiles of Maryland Web Page.
{{Taxonbar , from=Q1232370
Kinosternon
Reptiles described in 1789