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FIGURE 2 in A new species of freshwater turtle of the genus Elseya (Testudinata: Pleurodira: Chelidae) from the Northern Territory of Australia
FIGURE 2. Dorsal and lateral views of the holotype of Elseya (Elseya) flaviventralis NTM 13512, adult female from Pine Creek Crossing, South Alligator River Drainage, Kakadu National Park, Northern Territory, Australia. 13° 30' S 132° 28' E. The plastron has been disarticulated. Note the uniform coloration of the plastron, free from darker streaks and blotches, and the indistinct angle between the bridge and the plastron. Scale 10 mm.
FIGURE 1 in A new species of freshwater turtle of the genus Elseya (Testudinata: Pleurodira: Chelidae) from the Northern Territory of Australia
FIGURE 1. Adult female Yellow Bellied Snapping Turtle (Elseya (Elseya) flaviventralis) from Pul Pul Billabong, Kakadu National Park, Northern Territory (13° 34' S, 132° 35' E).
FIGURE 4 in A new species of freshwater turtle of the genus Elseya (Testudinata: Pleurodira: Chelidae) from the Northern Territory of Australia
FIGURE 4. Distribution of extant species in the genus Elseya. The ranges of Elseya rhodini and Elseya branderhorsti overlap to the west and including the Fly River drainage. Type localities are shown as red dots, with the exception of E. branderhorsti (green dot). The type locality for E. lavarackorum is outside range because it was described from a fossil from Riversleigh now outside its present range. E. rhodini occupies small streams and tributaries; E. branderhorsti occupies tidal regions, lower reaches and lakes, so the two are seldom found in microsympatry.
FIGURE 3 in A new species of freshwater turtle of the genus Elseya (Testudinata: Pleurodira: Chelidae) from the Northern Territory of Australia
FIGURE 3. Dorsal and lateral views of the Paratype (Allotype) of Elseya (Elseya) flaviventralis NTM 13985, adult male from Pul Pul Billabong, South Alligator River Drainage, Northern Territory, Australia. 13° 34' S 132° 35' E. Scale 10 mm. The plastron has been disarticulated.
Data - Leech removal is not the primary driver of basking behavior in a freshwater turtle
<p>Leaving the water to bask (usually in the sun) is a common behavior for many freshwater turtles, with some species also engaging in "nocturnal basking." Ectoparasite removal is an obvious hypothesis to explain nocturnal basking and has also been proposed as a key driver of diurnal basking. However, the efficacy of basking, day or night, to remove leeches has not been experimentally tested. Therefore, we examined the number of leeches that were removed from Krefft's river turtles (<i>Emydura macquarii krefftii</i>) after experimentally making turtles bask at a range of times of day, durations, and temperatures. Turtles had high initial leech loads, with a mean of 32.1 leeches per turtle. Diurnal basking under a heat lamp for 3 h at ~<span>28°C significantly reduced numbers of leeches relative to controls. In diurnal trials, 90.9% of turtles lost leeches (mean loss of 7.1 leeches per turtle), whereas basking for 30 mins under the same conditions was not effective (no turtles lost leeches, and all turtles were still visibly wet). Similarly, "nocturnal basking" at ~23°C for 3 h was not effective at removing leeches. Only 18% of turtles lost leeches (one turtle lost one leech and another lost four leeches). Diurnal basking outdoors under direct sunlight for 20 min (</span>mean temp = 34.5°C) resulted in a small reduction in leeches, with 50% of turtles losing leeches and an average loss of 0.7 leeches per turtle. These results indicate basking can remove leeches if temperatures are high or basking durations are long. However, it was only effective at unusually long basking durations in this system. Our data showed even the 20-min period was longer than 70.1% of natural diurnal basking events, many of which took place at cooler temperatures. Therefore, leech removal does not appear to be the purpose of the majority of basking events.</p>
FIGURE4 in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines: Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE4. Phylogenetic tree of Serpinema cayennensis n. sp. and four species of Camallanus based on Bayesian Inference analysis of partial 18S rDNA sequences.
FIGURE2. Serpinema cayennensis n in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines: Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE2. Serpinema cayennensis n. sp. from Rhinoclemmys punctularia Daudin from French Guiana, photomicrographs. A—anterior end of body, male, lateral view; B—anterior end of body, female, lateral view; C—buccal capsule, male, lateral view; D—buccal capsule, female, lateral view; E—dorsal trident, female, dorsal view; F—part of female genital system near vulva, lateral view; G—posterior end of body, female, lateral view; H—posterior end of body, male, lateral view; I—male spicules, lateral view.
FIGURE1. Serpinema cayennensis n in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines: Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE1. Serpinema cayennensis n. sp. from Rhinoclemmys punctularia Daudin from French Guiana, line-drawings. A—anterior end of body, male, lateral view; B—anterior end of body, female, lateral view; C—buccal capsule, male, lateral view; D—buccal capsule, female, lateral view; E –anterior end of body, male, apical view; F—dorsal trident, female, dorsal view; G—part of female genital system near to vulva, lateral view; H—posterior end of body, male lateral view; cl—cloaca; I—posterior end of body, male, ventral view; J—male spicules, lateral view; K—mucrons at posterior end of female scale 20µm; L—posterior end of body, female, lateral view
FIGURE3 in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines: Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE3. Phylogenetic tree of two species of Serpinema and seven species of Camallanus based on Bayesian Inference analysis of partial 28S rDNA sequences.
FIGURE5 in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines: Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE5. Phylogenetic tree of two species of Serpinema cayennensis n. sp. and four species of Camallanus based on Bayesian Inference analysis of partial cytochrome oxidase subunit I (COI) sequences.
FIGURE1. Serpinema cayennensis n in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE1. Serpinema cayennensis n. sp. from Rhinoclemmys punctularia Daudin from French Guiana, line-drawings. A—anterior end of body, male, lateral view; B—anterior end of body, female, lateral view; C—buccal capsule, male, lateral view; D—buccal capsule, female, lateral view; E –anterior end of body, male, apical view; F—dorsal trident, female, dorsal view; G—part of female genital system near to vulva, lateral view; H—posterior end of body, male lateral view; cl—cloaca; I—posterior end of body, male, ventral view; J—male spicules, lateral view; K—mucrons at posterior end of female scale 20µm; L—posterior end of body, female, lateral view
FIGURE2. Serpinema cayennensis n in Serpinema cayennensis n. sp. (Nematoda: Camallanidae), a parasite of the freshwater turtle Rhinoclemmys punctularia Daudin (Reptilia: Testudines Geoemydidae) from French Guiana: morphology and phylogenetic relationships with other turtle-parasitising camallanids
FIGURE2. Serpinema cayennensis n. sp. from Rhinoclemmys punctularia Daudin from French Guiana, photomicrographs. A—anterior end of body, male, lateral view; B—anterior end of body, female, lateral view; C—buccal capsule, male, lateral view; D—buccal capsule, female, lateral view; E—dorsal trident, female, dorsal view; F—part of female genital system near vulva, lateral view; G—posterior end of body, female, lateral view; H—posterior end of body, male, lateral view; I—male spicules, lateral view.
FIG. 3 in Towards a Diagnostic Tool for Turtle Ootaxonomy: Investigation of Microstructural Differences in the Eggshells of Australian Freshwater Turtles
FIG. 3. Size and density comparison of turtle egg membrane structures across species: (A) central plaque diameter (F2,87 ¼ 33.9, P, 0.01) and (B) basal knob diameter (F2,87 ¼ 7.9, P, 0.01). Note that plaques and basal knobs were not visible on any Eastern Long-necked Turtle (Chelodina longicollis) images, so are not included here.
FIG. 2 in Towards a Diagnostic Tool for Turtle Ootaxonomy: Investigation of Microstructural Differences in the Eggshells of Australian Freshwater Turtles
FIG. 2. Size comparison of turtle eggshell units across species: (A) largest shell unit diameter (F3,86 ¼ 8.1, P, 0.01), (B) smallest shell unit diameter (F3,86 ¼ 6.0, P, 0.01), (C) ratio of shell unit diameters (F3,86 ¼ 1.9, P ¼ 0.15), and (D) shell unit density (F3,18 ¼ 1.3, P ¼ 0.30).
FIG. 1 in Towards a Diagnostic Tool for Turtle Ootaxonomy: Investigation of Microstructural Differences in the Eggshells of Australian Freshwater Turtles
FIG. 1. Images of turtle eggshells under a scanning electron microscope. (A) Fragment of eggshell mineral layer from a Murray River Turtle (Emydura macquarii) egg, displaying shell units (white circles) and pores (*). (B) Fragment of eggshell mineral layer extracted from a dead Eastern Long-necked Turtle (Chelodina longicollis). The female had suffered road mortality prior to oviposition. (C) Outer surface of eggshell membrane layer from a Murray River Turtle egg, displaying basal knobs (white circle) and central plaques (*). (D) Fragment of eggshell outer membrane layer extracted from a dead Eastern Long-necked Turtle. (E) Cross section of an eggshell membrane from a Bell's Turtle (Myuchelys bellii) egg, displaying shell units of the outer mineral layer (dark circles) and the membrane layer (*). (F) Inner surface of eggshell membrane layer from a Bellinger River Turtle (M. georgesi) egg. Damage to the membrane (*) appears to reveal the fibrous matrix of the membrane interior.
Figure 1 in Helminths of freshwater turtles in Northeastern Brazil: parasite-host-environment relationships
Figure 1. Locations where the turtles Phrynops geoffroanus and Mesoclemmys tuberculata were collected from Caatinga and Atlantic Forest, Northeastern Brazil: (1) Reserva Biológica de Santa Isabel (municipality of Pirambú); (2) Refúgio de Vida Silvestre Mata do Junco (municipality of Capela); (3) Parque Nacional Serra de Itabaiana (municipality of Areia Branca); (4) Monumento Natural do Rio São Francisco (municipality of Poço Redondo); (5) Monumento Natural Grota do Angico (municipality of Poço Redondo); and (6) Basin of Real River (municipality of Tobias Barreto).
Data from: Description of a new species of Hedruris Nitzsch, 1821 (Nematoda, Hedruridae) from freshwater turtles in Argentina, with information on its life cycle and a review of the genus’s host and geographic distribution
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Data from: Environmental DNA surveys help to identify winter hibernacula of a temperate freshwater turtle
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Data from: Phylogeography of the Australian freshwater turtle Chelodina expansa reveals complex relationships among inland and coastal bioregions
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Patterns of fluctuating asymmetry in the limbs of freshwater turtles: are more functionally important limbs more symmetrical?
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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