Indian narrow-headed softshell turtle

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Indian narrow-headed softshell turtle
Dudhwalive chitra.JPG
CITES Appendix II (CITES) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Family: Trionychidae
Genus: Chitra
Species:
C. indica
Binomial name
Chitra indica
(Gray, 1831)
Synonyms [2]
  • Trionyx indicusGray, 1831
  • Gymnopus lineatusDuméril & Bibron, 1835
  • Chitra indicaGray, 1844
  • Gymnopus indicusCantor, 1847
  • Testudo chitraBuchanan-Hamilton, 1831(nomen nudum)
  • Trionyx lineatusMartens, 1876
  • Aspidonectes indicusHay, 1904

The Indian narrow-headed softshell turtle (Chitra indica), also known as the small-headed softshell turtle or the Indo-Gangetic softshell turtle, is an endangered species of softshell turtle native to waterways and rivers of the Indian subcontinent. [3] It is very large (being one of the largest freshwater turtles), feeding on fish, frogs, worms, crustaceans and molluscs, and even the occasional swimming small rodent or other mammal. C. indica, like other softshell turtles, uses it flexible (and somewhat leathery) shell to dig itself deep into sandy lake and river bottoms; here, it patiently waits (with just its nose, mouth and eyes exposed) for potential prey to swim by. They will also ambush and chase their prey, depending on availability, the time of year, and size of the prey. [4] In the past it was included as a subspecies of Chitra chitra , a species restricted to Southeast Asia using current taxonomy. [2]

Contents

Diagnostic characters

This species is very large with a carapace up to 1.1 m (3.6 ft). [4]

  1. Overall color: olive to deep olive-green;
  2. Very complex midline (vertebral) carapacial pattern;
  3. Midline (vertebral) carapacial stripe present;
  4. Complex radiating costal stripes;
  5. Paramedian neck stripes forming a bell-like pattern on anterior carapace absent;
  6. Neck stripes do not form a continuous light rim around carapace;
  7. No distinct pair of neck stripes;
  8. Dark speckling on "light" (head and neck) stripes;
  9. Anterior neck "V" divergence point on neck;
  10. 3-4 forelimb lamellae;
  11. No peri-orbital X pattern;
  12. No distinct peri-orbital ocelli;
  13. No distinct naso-orbital triangular "figure";
  14. Few, if any, black dots present on chin pattern.

Type locality: "India, fl. Ganges, Penang"; restricted by Smith (1931:162) to "Fatehgarh, Ganges," India = "India: Ganges; Futtaghur" (Gray 1864: 92)

Distribution

This species is found in the Sutlej and Indus river basins of Pakistan, and Ganges, Godavari, Mahanadi and other rivers basins of India, Nepal and Bangladesh. [4] Although widespread, it occurs in low densities, even within protected areas. [4] It is threatened by hunting and habitat loss. [4] It prefers clear, large or medium rivers with sandy bottoms. [4] It spends most of time concealed below the sand, sometimes with only the tip of the nose exposed. [4]

Eating habits

Skeletal proof of long neck Chitra indica, skeleton.jpg
Skeletal proof of long neck

Buried in sand, the Indian narrow-headed softshell turtle waits for its prey to come into its reach. When this happens, the turtle's head extends out of its shell at a high velocity in order to grab and then eat the prey. [5] [6] In a 2009 video from Animal Planet's show River Monsters , this turtle is seen quickly extending its head and long retractable neck out of its shell. [7]

Conservation

The Nepali government has established a turtle breeding center in Chitwan National Park and granted permission to a non-governmental organization to rescue and conserve the turtles in eastern Nepal. [8] Despite this, and the turtles' status as an endangered species, it is not on the Nepali government's list of highly protected wildlife. Conservationists have claimed the Nepali government's actions do not go far enough in protecting the turtles from natural and anthropogenic threats, such as increased flooding due to the worsening of monsoons caused by climate change, damming of rivers, and gravel mining.

In 2022, after two decades of breeding attempts, 41 newborn turtles hatched at San Diego Zoo.

Threats

The turtles are often caught by humans, both as bycatch and for consumption, as turtle meat and eggs are considered a delicacy. [8]

Related Research Articles

<span class="mw-page-title-main">Trionychidae</span> Family of turtles

The Trionychidae are a taxonomic family of a number of turtle genera, commonly known as softshell turtles. The family was erected by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish areas. Members of this family occur in Africa, Asia, and North America, with extinct species known from Australia. Most species have traditionally been included in the genus Trionyx, but the vast majority have since been moved to other genera. Among these are the North American Apalone softshells that were placed in Trionyx until 1987.

<span class="mw-page-title-main">Indian flapshell turtle</span> Species of freshwater turtle predominant in South Asia

The Indian flapshell turtle is a freshwater species of turtle found in South Asia. The "flap-shelled" name stems from the presence of femoral flaps located on the plastron. These flaps of skin cover the limbs when they retract into the shell. It is unclear what protection the flaps offer against predators. Indian flapshell turtles are widespread and common in the South Asian provinces. It is morphologically an evolutionary link between the softshell and hardshell aquatic turtles. Exploitation for profit and habitat change are threats to their survival.

<span class="mw-page-title-main">Asian giant softshell turtle</span> Species of freshwater turtle

The Asian giant softshell turtle, also known commonly as Cantor's giant softshell turtle and the frog-faced softshell turtle, is a species of freshwater turtle in the family Trionychidae. The species is native to Southeast Asia. The species is critically endangered and in the 20th century has disappeared from much of its former range.

<span class="mw-page-title-main">Leith's softshell turtle</span> Species of reptile

Leith's softshell turtle is a species of turtle in the family Trionychidae. The species is found in peninsular Indian rivers including the Thungabhadra, Ghataprabha, Bhavani, Godavari, Kaveri and Moyar Rivers. The type locality is Pune in India.

<span class="mw-page-title-main">Indian softshell turtle</span> Species of freshwater turtle

The Indian softshell turtle, or Ganges softshell turtle is a species of softshell turtle found in South Asia in rivers such as the Ganges, Indus and Mahanadi. This vulnerable turtle reaches a carapace length of up to 94 cm (37 in). It feeds mostly on fish, amphibians, carrion and other animal matter, but also takes aquatic plants. This turtle is listed in part II of Schedule I of the Wild Life (Protection) Act, 1972 and possession of this species is an offence.

<i>Chitra</i> (genus) Genus of turtles

Chitra is a genus of turtles in the family Trionychidae.

<span class="mw-page-title-main">Black pond turtle</span> Species of turtle

The black pond turtle, also known commonly as the spotted pond turtle and the Indian spotted turtle, is a species of freshwater turtle in the family Geoemydidae. The species, which is endemic to South Asia, belongs to the monotypic genus Geoclemys.

<span class="mw-page-title-main">Indian roofed turtle</span> Species of turtle

The Indian roofed turtle is a species of turtle in the family Geoemydidae. It can be distinguished by the distinct "roof" at the topmost part of the shell. It is found in the major rivers of South Asia. It is a common pet in the Indian Subcontinent.

<span class="mw-page-title-main">Wattle-necked softshell turtle</span> Species of turtle

The wattle-necked softshell turtle, also commonly known as Steindachner's soft-shelled turtle, is an endangered Asian species of softshell turtle in the family Trionychidae. The species is the only member of the genus Palea.

<span class="mw-page-title-main">Chinese softshell turtle</span> Species of turtle

The Chinese softshell turtle is a species of softshell turtle that is native to China and Taiwan, with records of escapees—some of which have established introduced populations—in a wide range of other Asian countries, as well as Spain, Brazil and Hawaii.

<i>Apalone</i> Genus of turtles

Apalone is a genus of turtles in the family Trionychidae. The three species of Apalone are native to freshwater habitats in North America; they are the only living softshell turtles from the Americas.

<span class="mw-page-title-main">Narrow-bridged musk turtle</span> Species of turtle in the family Kinosternidae

The narrow-bridged musk turtle is a species of turtle in the family Kinosternidae. The species is found in Central America and Mexico.

<span class="mw-page-title-main">Spiny softshell turtle</span> Species of turtle

The spiny softshell turtle is a species of softshell turtle, one of the largest freshwater turtle species in North America. 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).

<span class="mw-page-title-main">Gulf Coast spiny softshell turtle</span> Subspecies of turtle

The Gulf Coast spiny softshell turtle, a subspecies in the Trionychidae family of softshell turtles, is endemic to the south-eastern United States.

<span class="mw-page-title-main">Florida softshell turtle</span> Species of turtle

The Florida softshell turtle is a species of turtle in the family Trionychidae. The species is native to the Southeastern United States.

<span class="mw-page-title-main">Asian narrow-headed softshell turtle</span> Species of turtle

The Asian narrow-headed softshell turtle is a large species of softshell turtle in the family Trionychidae. The species is endemic to Southeast Asia.

<span class="mw-page-title-main">Malayan softshell turtle</span> Species of turtle

The Malayan softshell turtle is a species of softshell turtle in the family Trionychidae. It is monotypic in its genus.

<i>Nilssonia</i> (turtle) Genus of turtles

Nilssonia is a genus of softshell turtles from rivers, streams, ponds, and lakes in South Asia and Burma. In many treatments, it is monotypic, with the single species Burmese peacock softshell. However, the supposed other genus of peacock softshells, Aspideretes, is more closely related to N. formosa than had been believed. They differ only in the neural plates between the first pleural scale pair of the bony carapace, which are fused into one in N. formosa and unfused in the others.

<span class="mw-page-title-main">Euphrates softshell turtle</span> Species of turtle

The Euphrates softshell turtle, also known as the Mesopotamian softshell turtle, is a species of softshell turtle in the family Trionychidae. It is found throughout much of the Euphrates–Tigris river basin in Iraq, Syria, Turkey and Khūzestān Province of Iran. Historically it has also been reported from Israel, but this likely involves confusion with the very similar Trionyx triunguis.

The Burmese narrow-headed softshell turtle, also known commonly as the Myanmar narrow-headed softshell turtle and Van Dijk's chitra, is a species of turtle in the family Trionychidae. The species is endemic to Southeast Asia.

References

  1. "Appendices | CITES". cites.org. Retrieved 14 January 2022.
  2. 1 2 Fritz Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 312. ISSN   1864-5755. Archived from the original (PDF) on 1 May 2011. Retrieved 29 May 2012.
  3. "About Reptiles - Indian Reptiles -Dudhwa National Park Animals". www.dudhwatigerreserve.com. Retrieved 19 September 2022.
  4. 1 2 3 4 5 6 7 Das, I.; and Singh, S. (2009). Chitra indica. Conservation Biology of Freshwater Turtles and Tortoises, Chelonian Research Monographs 5
  5. "Chitra indica (Narrow-headed soft-shelled Turtle)".
  6. "Narrow-headed Softshell Turtle". Saint Louis Zoo.
  7. Animal Planet (24 April 2009). "River Monsters: Turtle Strikes Like a Snake". YouTube. Archived from the original on 21 December 2021.
  8. 1 2 "Rare turtles hatch from eggs rescued from flood-prone Nepal riverbank". Mongabay Environmental News. 16 September 2022. Retrieved 19 September 2022.

Bibliography