''Hemitrygon'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

stingray Stingrays are a group of sea rays, which are cartilaginous fish related to sharks. They are classified in the suborder Myliobatoidei of the order Myliobatiformes and consist of eight families: Hexatrygonidae (sixgill stingray), Plesiobatidae ( ...

s 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 ...

Dasyatidae from marine,

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

and freshwater habitats in the central

Indo-Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...

and northwest Pacific regions. The genus was formerly regarded as a

junior synonym The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linna ...

of the

Dasyatis ''Dasyatis'' (Greek δασύς ''dasýs'' meaning rough or dense and βατίς ''batís'' meaning skate) is a genus of stingray in the family Dasyatidae that is native to the Atlantic, including the Mediterranean. In a 2016 taxonomic revision ...

''.

Species

The

taxonomy Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

of ''Hemitrygon'' requires revision, as some existing species may be

synonyms A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

and there may be

undescribed species In taxonomy, an undescribed taxon is a taxon (for example, a species) that has been discovered, but not yet formally described and named. The various Nomenclature Codes specify the requirements for a new taxon to be validly described and named. U ...

. '' H. yemenensis'' was described in 2020 from materials collected nearly 120 years ago and its status in the wild is unknown. *'' Hemitrygon akajei'' ( Müller &

Henle Henle can refer to: * Friedrich Gustav Jakob Henle, a German physician, pathologist and anatomist (1809–1885) ** Loop of Henle in the kidney, named after Henle *Fritz Henle, a photographer, known as "Mr. Rollei" for his use of the 2.25" square for ...

, 1841) (Red stingray) *'' Hemitrygon bennetti'' ( Müller &

, 1841) Bennett's stingray) *'' Hemitrygon fluviorum'' ( Ogilby, 1908) (Estuary stingray) *'' Hemitrygon izuensis'' ( Nishida & Nakaya, 1988) (Izu stingray) *'' Hemitrygon laevigata'' ( Chu, 1960) (Yantai stingray) *'' Hemitrygon laosensis'' ( Roberts & Karnasuta, 1987) (Mekong freshwater stingray) *'' Hemitrygon longicauda'' (

Last A last is a mechanical form shaped like a human foot. It is used by shoemakers and cordwainers in the manufacture and repair of shoes. Lasts typically come in pairs and have been made from various materials, including hardwoods, cast iron, and ...

& W. T. White, 2013) (Merauke stingray) *'' Hemitrygon navarrae'' ( Steindachner, 1892) (Blackish stingray) *'' Hemitrygon parvonigra'' (

White White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White on ...

, 2008) (Dwarf black stingray) *'' Hemitrygon sinensis'' ( Steindachner, 1892) (Chinese stingray) *'' Hemitrygon yemenensis'' A. B. M. Moore,

& Naylor, 2020

References

{{Taxonbar, from=Q26903843 Dasyatidae Taxa named by Johannes Peter Müller & Taxa named by Friedrich Gustav Jakob Henle