Phylogeny and taxonomy of endangered South and South‐east Asian freshwater turtles elucidated by mtDNA sequence variation (Testudines: Geoemydidae: Batagur, Callagur, Hardella, Kachuga, Pangshura)

Praschag, Peter; Hundsdörfer, Anna K.; Fritz, Uwe

doi:10.1111/j.1463-6409.2007.00293.x

Cited by 59 publications

(87 citation statements)

References 22 publications

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“…However, Praschag et al (2007) found no evidence for genetic distinctiveness of H. t. indi and synonymized it under a monotypic H. thurjii.…”

Section: Conservation Biology Of Freshwater Turtles and Tortoisesmentioning

confidence: 93%

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Hardella thurjii (Gray 1831) – Crowned River Turtle

Das¹,

Bhupathy²

2009

Conservation Biology of Freshwater Turtles and Tortoises

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Summary. -The crowned river turtle, Hardella thurjii (Family Geoemydidae), is a large (CL to 65 cm) freshwater turtle, largely confined to lentic waters in the Indian subcontinent. The species shows extreme sexual size dimorphism, females attaining a length over three times that of the males. Only plant matter is taken by the species in some areas, but elsewhere prawn or fish may be taken, possibly as carrion. Courtship and mating take place during the summer months in northern India, and 8-19 ellipsoidal eggs may be produced. Heavy exploitation for its flesh and extensive wetland development projects are among the factors suspected to have made the turtle rare in localities where it was once common, although there is some evidence that the species is difficult to observe in the wild.

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“…However, Praschag et al (2007) found no evidence for genetic distinctiveness of H. t. indi and synonymized it under a monotypic H. thurjii.…”

Section: Conservation Biology Of Freshwater Turtles and Tortoisesmentioning

confidence: 93%

“…Genetics of the species has been analyzed by Praschag et al (2007) who found no evidence of genetic distinctiveness between the two previously recognized subspecies (H. t. thurjii and H. t. indi) and therefore synonymized them. The karyotype is unknown.…”

Section: 3mentioning

confidence: 99%

Hardella thurjii (Gray 1831) – Crowned River Turtle

Das¹,

Bhupathy²

2009

Conservation Biology of Freshwater Turtles and Tortoises

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“…Additionally, Praschag et al (2007) demonstrated that the formerly widespread species, Batagur baska (sensu lato), comprised at least two genetically distinct species. In a follow-up paper, Praschag et al (2008b) argued that based on priority, the more northern species (India to Myanmar) should retain the name B. baska and that the specific epithet affinis (Cantor 1847) was available for the southern spe- • Chelonian Research Monographs,No.…”

Section: Conservation Biology Of Freshwater Turtles and Tortoises • Cmentioning

confidence: 99%

“…Various authors have debated the relationships among these genera (e.g., Loveridge and Williams 1957;McDowell 1964;Hirayama 1984;Gaffney and Meylan 1988;Capler and Moll 1990;Spinks et al 2004). Praschag et al (2007), using DNA sequences of the mitochondrial cytochrome b gene, examined the relationships of species then constituting the genera Batagur, Callagur, Kachuga, Pangshura, and Hardella. A key finding was that Description.…”

Section: Conservation Biology Of Freshwater Turtles and Tortoises • Cmentioning

confidence: 99%

Batagur baska (Gray 1830) – Northern River Terrapin

Moll¹,

Platt²,

Praschag³

et al. 2009

Conservation Biology of Freshwater Turtles and Tortoises

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SuMMary. -The northern river terrapin, Batagur baska (Family Geoemydidae), is a large (carapace length to 59 cm) critically endangered river turtle that previously occupied most rivers and estuaries of South Asia (India, Bangladesh, and Myanmar). Populations of river terrapins occurring in Southeast Asia (Thailand, Cambodia, Malaysia, and Indonesia) previously referred to this species are now considered a separate closely-related species, the southern river terrapin, Batagur affinis. Exceptionally large concentrations of this species that resided in the Hugli River of West Bengal in India and the Ayeryawady Delta in Myanmar during the 19th and early 20th centuries are now extirpated. Nesting throughout the northern river terrapin's former range is now extremely rare and the product of only a few scattered survivors. The terrapin's demise has resulted from extensive exploitation of its flesh and eggs, exacerbated by indirect factors, including habitat alteration and destruction (e.g., sand-mining, dam building, water projects, and pollution) that have degraded the turtle's nesting areas and feeding habitat. Recently, remnant populations have also suffered from the introduction of efficient mechanized fishing craft with lethal wide-area nets throughout much of the remaining habitat. Conservation action for the terrapin has been woefully inadequate. Ideally, the species and its eggs require complete protection throughout its range. In India and Bangladesh, extant terrapins now appear to be so few that unless some previously unknown viable population is discovered, the only recourse may be to capture as many of the remaining wild individuals as possible to keep in captive breeding facilities until such time as it is feasible to re-establish a wild population in one or more sanctuaries. Less is known about the species' status in Myanmar. Additional surveys are needed for estuarine habitats in the poorly-known eastern and southeastern river systems in Myanmar to determine if viable populations survive, and if so, to identify nesting sites and critical feeding areas.diStributiOn. Gray, at times, was guilty of describing the same species under more than one name; the river terrapin is an example. In the same year, he published two other names for the terrapin, Trionyx (Tetraonyx) cuvieri and Emys batagur (1830b).

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“…Praschag et al (2007), using mitochondrial DNA, investigated the genetic relationships of the genera Kachuga and Pangshura, including P. sylhetensis, and confirmed the monophyly of Pangshura. They found that P. smithii and P. tentoria were sister species, with P. tecta and P. sylhetensis their successive sister taxa.…”

Section: Conservation Biology Of Freshwater Turtles and Tortoises • Cmentioning

confidence: 99%

Pangshura sylhetensis Jerdon 1870 – Assam Roofed Turtle

Das¹,

Sengupta²,

Praschag³

2010

Conservation Biology of Freshwater Turtles and Tortoises

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Taxonomy. -Pangshura sylhetensis was described by Jerdon in 1870, based on three syntypes that were deposited in the British Museum (Natural History), from the Khasi Hills of Sylhet District (at present in Bangladesh). Subsequently, Gray (1870) transferred the taxon to a new monotypic genus, Jerdonella, but Boulenger (1889) transferred it to the broad genus Kachuga. Moll (1986Moll ( , 1987 revived Pangshura as a subgenus for this and several other small turtles that were still allocated to Kachuga. More recently, this species and its relatives have been reallocated to its original genus, Figure 1. Adult male Pangshura sylhetensis from Kulsi River, Kamrup District, Assam, India. Photo by Indraneil Das.

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Phylogeny and taxonomy of endangered South and South‐east Asian freshwater turtles elucidated by mtDNA sequence variation (Testudines: Geoemydidae: Batagur, Callagur, Hardella, Kachuga, Pangshura)

Cited by 59 publications

References 22 publications

Hardella thurjii (Gray 1831) – Crowned River Turtle

Hardella thurjii (Gray 1831) – Crowned River Turtle

Batagur baska (Gray 1830) – Northern River Terrapin

Pangshura sylhetensis Jerdon 1870 – Assam Roofed Turtle

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