Kinosternon

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Barbour, Roger W. - One of the best experts on this subject based on the ideXlab platform.

Jason R. Bourque - One of the best experts on this subject based on the ideXlab platform.

  • new mud turtles kinosternidae Kinosternon from the middle late miocene of the united states
    Journal of Paleontology, 2015
    Co-Authors: Jason R. Bourque
    Abstract:

    Abstract. Kinosternon Spix, 1824, was widespread in xeric to savanna associated paleowetlands across North America during the middle—late Miocene and steadily diversified following its first occurrences in the Hemingfordian. In the middle Miocene, Kinosternon rincon n. sp. occurred in the late Barstovian Cerro Conejo Formation of north central New Mexico, perhaps concurrently with Kinosternon pojoaque Bourque 2012a from the Tesuque Formation. Subsequent late Miocene kinosternine fossils indicate that at least three potentially contemporaneous species existed throughout the Clarendonian. These are Kinosternon pannekollops n. sp., from the Ogallala Formation of northern Texas; Kinosternon wakeeniense, n. sp., from the Ogallala Formation of northwestern Kansas and Ash Hollow Formation of south-central Nebraska; and Kinosternon notolophus n. sp., from the Alachua and Statenville formations of northern Florida. Kinosternon rincon is phylogenetically nested between the Kinosternon flavescens (Agassiz, 1857) gro...

  • New mud turtles (Kinosternidae, Kinosternon) from the middle—late Miocene of the United States
    Journal of Paleontology, 2015
    Co-Authors: Jason R. Bourque
    Abstract:

    Abstract. Kinosternon Spix, 1824, was widespread in xeric to savanna associated paleowetlands across North America during the middle—late Miocene and steadily diversified following its first occurrences in the Hemingfordian. In the middle Miocene, Kinosternon rincon n. sp. occurred in the late Barstovian Cerro Conejo Formation of north central New Mexico, perhaps concurrently with Kinosternon pojoaque Bourque 2012a from the Tesuque Formation. Subsequent late Miocene kinosternine fossils indicate that at least three potentially contemporaneous species existed throughout the Clarendonian. These are Kinosternon pannekollops n. sp., from the Ogallala Formation of northern Texas; Kinosternon wakeeniense, n. sp., from the Ogallala Formation of northwestern Kansas and Ash Hollow Formation of south-central Nebraska; and Kinosternon notolophus n. sp., from the Alachua and Statenville formations of northern Florida. Kinosternon rincon is phylogenetically nested between the Kinosternon flavescens (Agassiz, 1857) gro...

  • Fossil Kinosternidae from the Oligocene and Miocene of Florida, USA
    Vertebrate Paleobiology and Paleoanthropology, 2012
    Co-Authors: Jason R. Bourque
    Abstract:

    Kinosternid remains are generally rare through the Oligocene and Miocene. Fossil material from eight Florida localities is presented here. Specimens discussed include the latest and most southeastern occurrence of the genus Xenochelys (new species), one of the earliest occurrences of Kinosternon, the oldest record of the Kinosternon subrubrum-baurii group in Florida, and the presence of Miocene Kinosternon species either convergent with or closely related to taxa that occur today in the southwestern United States and Central-South America.

  • A Fossil Mud Turtle (Testudines, Kinosternidae) from the Early Middle Miocene (Early Barstovian) of New Mexico
    Journal of Vertebrate Paleontology, 2012
    Co-Authors: Jason R. Bourque
    Abstract:

    ABSTRACT The nearly complete skeleton of a mud turtle, Kinosternon skullridgescens, n. sp., is described from Santa Fe County, New Mexico. The specimen was collected from the early middle Miocene, early Barstovian, Skull Ridge Member of the Tesuque Formation (16.0–14.9 Ma) and is one of the oldest and most complete fossil representatives of the genus Kinosternon. Phylogenetically, the new taxon is placed on the stem of the flavescens group in conjunction with the extinct Kinosternon pojoaque from the late Barstovian of New Mexico. In addition to the flavescens group, K. skullridgescens shares morphological similarities with members of the subrubrum group (of North America), as well as with Kinosternon herrerai (from gulf drainages of eastern Mexico). Close proximity of the fossils K. skullridgescens and K. pojoaque to Mexico suggests that a small-plastroned ancestor of the extant taxa K. herrerai, Kinosternon angustipons (from lower Central America), and Kinosternon dunni (from northwestern South America)...

  • An Extinct Mud Turtle of the Kinosternon flavescens Group (Testudines, Kinosternidae) from the Middle Miocene (Late Barstovian) of New Mexico
    Journal of Vertebrate Paleontology, 2012
    Co-Authors: Jason R. Bourque
    Abstract:

    ABSTRACT The complete skeleton of a fossil mud turtle, Kinosternon pojoaque, n. sp., is described from the late Barstovian Rodent Pocket, San Ildefonso Locality of Santa Fe County, New Mexico. The new species represents the oldest member of the Kinosternon flavescens group and suggests that this clade first evolved in the southwestern United States, which, along with northern Mexico, is the center of diversity for these turtles today. The new taxon exhibits plastral characters that suggest phylogenetic affinities with Kinosternon angustipons, Kinosternon dunni, Kinosternon herrerai, Kinosternon hirtipes, and Kinosternon sonoriense and is interpreted here as an example of a morphological intermediate between the clade composed of these taxa and the flavescens group. The new fossil, along with other Miocene Kinosternon fossils from New Mexico, provides evidence that the flavescens clade likely diverged from other southwestern, Central, and South American Kinosternon by at least the late Barstovian, 14.3–13....

Charles C. Peterson - One of the best experts on this subject based on the ideXlab platform.

  • Physiological and behavioral variation in estivation among mud turtles (Kinosternon spp.).
    Physiological and biochemical zoology : PBZ, 2002
    Co-Authors: Day B. Ligon, Charles C. Peterson
    Abstract:

    Abstract Kinosternid mud turtles, a primarily aquatic group, exhibit variable degrees of terrestrial activity in the Sonoran and Chihuahuan Deserts. We compared behavioral and physiological responses to dry conditions in four populations representing three species, Kinosternon sonoriense, Kinosternon flavescens, and Kinosternon hirtipes. All four groups were subjected to simulated dry season conditions in the laboratory, during which activity was monitored and physiological responses (blood chemistry and rates of resting metabolism and evaporative water loss) were measured. Kinosternon flavescens and K. hirtipes represented extremes in apparent ability to estivate, based on activity and rate of increase of plasma osmolality. Two populations of K. sonoriense exhibited intraspecific differences in behavioral and physiological measures that were related to extant environmental conditions. Large numbers of K. sonoriense from Arizona and K. hirtipes, the poorest estivators, had to be rehydrated after only 30 d...

Alana Lislea De Sousa - One of the best experts on this subject based on the ideXlab platform.

  • Population analysis of Kinosternon scorpioides using SSR markers
    PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019), 2019
    Co-Authors: Ligia Almeida Pereira, Edyane Moraes Dos Santos, Ligia Tchaicka, Alana Lislea De Sousa
    Abstract:

    Three natural populations of Kinosternon scorpioides located in the region of Baixada Maranhense were studied in order to quantify and compare levels of diversity and genetic structure using SSR markers. Ten microsatellite loci were validated for analysis in 56 individuals. The observed heterozygosities (Ho) were 0.838; 0.691 and 0.741 and the expected (He) 0.824; 0.819 and 0.815 for the populations of Sao Bento, Pinheiro and Anajatuba, respectively. AMOVA test showed that 98.97% of the total genetic variation is within populations while 1.03% is among populations. The estimated gene flow of 6,882 corroborates the small population differentiation (FST = 0.044). The populations of Sao Bento and Pinheiro are closer together genetically, according to the presented grouping analysis. These genetic data are important for the elaboration of strategic actions of management and conservation of the chelonians and especially Kinosternon scorpioides.

  • body and testicular biometric parameters of the scorpion mud turtle Kinosternon scorpioides
    Acta Scientiarum. Biological Sciences, 2014
    Co-Authors: Diego Carvalho Viana, Amilton Cesar Dos Santos, Antonia Santos Oliveira, Lianne Pollianne Fernandes Araujo Chaves, Antonio Chaves De Assis Neto, Alana Lislea De Sousa
    Abstract:

    The reptile Kinosternon scorpioides is a freshwater chelonian, popularly known as jurara, and is found in the Baixada Maranhense, Maranhao State, Brazil. Due to the lack of scientific information on the reproductive biology of the species, current paper describes the body and testicular biometry and the gonad-somatic index (GSI) in adult specimens collected from the natural environment. Twenty male adults were collected in the rainy (n = 10) and dry (n = 10) seasons. Data were derived from the body, testis size and GSI and tests of correlation between these measures were performed. The body biometrics of free-living Kinosternon scorpioides is similar to those found in other studies for adult animals bred in captivity. The body weight was higher in animals collected in the rainy season than that in animals collected in the dry season. The testis size presents variations among animals captured during the rainy and dry season, but the gonadossomatic index did not vary between different groups of animals. Further studies were suggested related to the levels of sexual steroid hormones and behavioral studies to understand the factors related to the species´s reproductive cycle.

  • morphological study of epididymides in the scorpion mud turtle in natural habitat Kinosternon scorpioides linnaeus 1976
    Biotemas, 2013
    Co-Authors: Diego Carvalho Viana, Antonia Santos Oliveira, Leandro Almeida Rui, Maria Angelica Miglino, Lianne Polianne Fernandes Araujo, Alana Lislea De Sousa
    Abstract:

    Morphological study of the epididymis of jurara in natural habitat (Kinosternon scorpioides – Linnaeus, 1976). In the state of Maranhao, Brazil, one can find the freshwater chelonian Kinosternon scorpioides, known as scorpion mud turtle, which has social, economic, and environmental value. Twenty adult scorpion mud turtles were collected in the months of March, June, September, and December, corresponding to the two periods of the year: the rainy and dry seasons. The epididymides were collected from each animal to check the existence of reproductive seasonality. The organs were evaluated through light, scanning electron, and transmission microscopy and analyzed at the epididymal epithelium height and the tubular and luminal diameters. The epididymides were divided into rete testis, ductuli efferentes, and ductus epididymis. In the rainy season, they presented stereo ciliated pseudostratified epithelium; in the dry season, they were characterized by simple, cubic, and non-ciliated cells. The morphometry of the tubular and luminal diameters and the epididymal epithelium height showed moments of epithelial alternation over the studied periods, with the highest averages in the rainy season, within the reproductive period. Spermatozoids were observed throughout the year, although their viability couldn’t be evaluated. Taking into account the data obtained, one may claim that the scorpion mud turtle presents reproductive seasonality.

  • Effects of fasting and refeeding on the metabolic functions of the turtle Kinosternon scorpioides (Linnaeus, 1766) raised in captivity
    Pesquisa Veterinária Brasileira, 2013
    Co-Authors: Antonia Santos Oliveira, Alana Lislea De Sousa, Cinthia G. Candioto, Débora Martins Silva Santos, José Gomes Pereira, Célio Raimundo Machado
    Abstract:

    The metabolic responses of adult and young freshwater Kinosternon scorpioides turtles raised in captivity were evaluated. Two experiments were performed: a) blood metabolite changes caused by food deprivation, and b) liver and muscle glycogen and total lipid differences after fasting and refeeding. Blood glucose concentration of young animals was susceptible to food deprivation. In both groups this metabolite decreased after 30 days of fasting. Feeding for 15 days did not recover blood glucose. Total seric proteins were not affected by food deprivation. Fasting decreased blood urea nitrogen and the highest difference was found around 30 days. Uric acid increased in young animals after 60 days of fasting. Triacylglicerol decreased after 15 days of fasting and refeeding for 15 days recovered the pre-fasting levels. Free fatty acid plasma tended to increase around 15 days of fasting. Liver glycogen decreased at day 15 of fasting, being stable thereafter while muscle glycogen decreased at a slower rate. Total liver lipid stabilized after 30 days and then decreased 70% after 60 days of fasting. Muscle lipids remained stable throughout fasting. It could be concluded that fasting of Kinosternon scorpioides led to metabolic adaptations similar to the one reported from reptiles and fish.

  • DISTRIBUIÇÃO ARTERIAL DOS PRINCIPAIS VASOS DA CAVIDADE CELOMÁTICA EM Kinosternon sorpioides
    Ciência Animal Brasileira, 2009
    Co-Authors: Sâmia Clara Rodrigues De Oliveira, Ligia Almeida Pereira, Antonio Augusto Nascimento Machado Júnior, Rafael Cardoso Carvalho, Antonia Santos Oliveira, Alana Lislea De Sousa
    Abstract:

    Were described the arterial distribution of the vessels in the celomatic cavity of six Kinosternon scorpioides scorpioides adults. The arterial circuit was filled out with red-faced latex, fixation in solution formaldehyd to 10% and dissection subsequent. It was evidenced that the irrigation of the organs of the cavity celomatic happens starting from two aorta, the left and the right aorta that form the dorsal aorta. The left aorta becomes separated in two branches the celiac and the mesenteric artery. The celiac branch originate two gastric arteries. While the mesenteric artery answers for the irrigation of the segments of the small intestines and thick, besides contributing for the irrigation of the spleen, through the esplenic artery. The right aorta joins the left aorta to form the dorsal aorta, this emits branches to the kidneys and genital organs of the female and of the male, before of the division in the right and left common iliacs arteries. It is possible to conclude that the Kinosternon s. scorpioides showed certain likeness with other chelonies species , in relation the origin and the distribution of the aortas, with some variations in what refers the distribution of your primary branches. KEY WORDS: Anatomy, arteries, Kinosternon scorpioides scorpioides.

Eisinhower Rincón - One of the best experts on this subject based on the ideXlab platform.

  • Morphology, Diet, and Population Structure of the Southern White-lipped Mud Turtle Kinosternon leucostomum postinguinale (Testudines: Kinosternidae) in the Nus River Drainage, Colombia
    Journal of Herpetology, 2016
    Co-Authors: Claudia P. Ceballos, Daniel Zapata, Carolina Alvarado, Eisinhower Rincón
    Abstract:

    Abstract Most existing studies on the White-lipped Mud Turtle, Kinosternon leucostomum, have been based on northern Central American populations, leaving a lack of information on populations from southern Central America and South America. Herein we studied morphology, diet, and population structure of a population of the southern Kinosternon leucostomum postinguinale inhabiting four creeks in Colombia. Observed habitats used were highly variable, ranging from relatively clean waters to streams used for sewage disposal of wastewater from a human settlement. Body size was smaller than that of other populations of southern K. l. postinguinale and also than that of the northern K. l. leucostomum. Sexual dimorphism was evident, with males heavier, longer, and wider than females. Body size was associated with the habitat of origin, with Barrio Nuevo individuals being the largest. The main components of the diet were plant material, insects, snails, and algae. We did not find evidence of sexual differences in t...

  • morphology diet and population structure of the southern white lipped mud turtle Kinosternon leucostomum postinguinale testudines kinosternidae in the nus river drainage colombia
    instname: Universidad de Antioquia, 2016
    Co-Authors: Claudia Patricia Ceballos Fonseca, Daniel Zapata, Carolina Alvarado, Eisinhower Rincón
    Abstract:

    Most existing studies on the White-lipped Mud Turtle, Kinosternon leucostomum, have been based on northern Central American populations, leaving a lack of information on populations from southern Central America and South America. Herein we studied morphology, diet, and population structure of a population of the southern Kinosternon leucostomum postinguinale inhabiting four creeks in Colombia. Observed habitats used were highly variable, ranging from relatively clean waters to streams used for sewage disposal of wastewater from a human settlement. Body size was smaller than that of other populations of southern K. l. postinguinale and also than that of the northern K. l. leucostomum. Sexual dimorphism was evident, with males heavier, longer, and wider than females. Body size was associated with the habitat of origin, with Barrio Nuevo individuals being the largest. The main components of the diet were plant material, insects, snails, and algae. We did not find evidence of sexual differences in the diet, but we found geographic differences in the body size. The population with the largest individuals, from Barrio Nuevo Creek, consumed more snails while those from Totumo Creek, the population with the smallest individuals, consumed more ants and plant material as compared to the other creeks. Additionally, we found a highly male-biased sex ratio, with 2.5 adult males per female, very few juveniles, and no nests, which suggests a dangerous risk of population decline. We suggest continued monitoring of the demography of this population, emphasizing its reproductive biology.

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