''Phrynops hilarii'', commonly known as Hilaire’s toadhead turtle or Hilaire’s side-necked turtle, is a
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 freshwater
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 tu ...
in the
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
Chelidae
Chelidae is one of three living families of the turtle suborder Pleurodira, and are commonly called Austro-South American side-neck turtles. The family is distributed in Australia, New Guinea, parts of Indonesia, and throughout most of South Amer ...
. 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 elsew ...
to
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...
.
Etymology
The
specific name, ''hilarii'', is in honor of
French zoologist
Zoology ()The pronunciation of zoology as is usually regarded as nonstandard, though it is not uncommon. is the branch of biology that studies the Animal, animal kingdom, including the anatomy, structure, embryology, evolution, Biological clas ...
Isidore Geoffroy Saint-Hilaire
Isidore Geoffroy Saint-Hilaire (16 December 1805 – 10 November 1861) was a French zoologist and an authority on deviation from normal structure. In 1854 he coined the term ''éthologie'' (ethology).
Biography
He was born in Paris, the son ...
.
Geographic range
''P. hilarii'' is found in southern
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
(
Santa Catarina and
Rio Grande do Sul
Rio Grande do Sul (, , ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative_units_of_Brazil#List, fifth-most-populous state and the List of Brazilian st ...
), southward and westward into
Uruguay
Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...
and
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
, and possibly also in
Paraguay
Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...
and
Bolivia
, image_flag = Bandera de Bolivia (Estado).svg
, flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center
, flag_alt2 = 7 × 7 square p ...
.
[The Reptile Database]
/ref>
Habitat
These turtles inhabit streams, lakes and swamps with abundant aquatic vegetation and soft bottoms.[
]
Description
''Phrynops hilarii'' has an oval, flattened carapace, with a maximum length of approximately 40 cm, weighing approximately 5 kg. The carapace is usually dark brown, olive, or gray, with a yellow border. The head is large and flat, gray to olive above, with a pointed snout and two bicolored chin barbels There is a black band on each side of the head, which comes out of the muzzle and passes over the eyes, going up to the neck. [Turtles of the World]
/ref>
Biology
This omnivorous species mainly feed on arthropods, with a preference for copepods, ostracods, and hemipterans. They feed also on fish, birds, reptiles, small mammals and dead animals. It is oviparous. [ These turtles can live for up to 37 years. The animal ageing and longevity database]
Females lay twice a year, one between February and May and the other between September and December. They lay from 9 to 14 eggs, with a maximum of 32 eggs and an incubation period of approximately 150 days.
References
Further reading
* Boulenger, George Albert (1889). ''Catalogue of the Chelonians, Rhynchocephalians, and Crocodiles 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. (''Hydraspis hilarii'': p. 220, figure 59, three views of skull; p. 221, figure 60, carapace
A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tor ...
and plastron; p. 222, species description).
{{Taxonbar, from=Q1080458
hilarii
Turtles of South America
Reptiles of Brazil
Reptiles of Paraguay
Reptiles of Uruguay
Reptiles described in 1835
Taxa named by André Marie Constant Duméril
Taxa named by Gabriel Bibron