Longtail stingray

Source: Wikipedia, the free encyclopedia.
"Longtail stingray" may also refer to
Himantura uarnak
.

Longtail stingray
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Batoidea
Order: Myliobatiformes
Family: Dasyatidae
Genus: Hypanus
Species:
H. longus
Binomial name
Hypanus longus
(Garman, 1880)
Range of the longtail stingray
Synonyms
  • Dasyatis longa Garman, 1880
  • Trygon longa Garman, 1880

The longtail stingray (Hypanus longus, often misspelled longa),

aplacental viviparous
, with females giving birth to 1–5 young in late summer. It is caught for food, likely throughout its range, but specific fishery data is lacking.

Taxonomy and phylogeny

American

Ma).[3]

Distribution and habitat

The longtail stingray is found along the

mangrove swamps at Fernandina Island.[5]

Description

The longtail stingray reaches a maximum known disc width of 1.58 m (5.2 ft), length of 2.57 m (8.4 ft), and weight of 46.4 kg (102 lb).

papillae across the floor of the mouth; the two on the sides are smaller than the others. The pelvic fins are rounded.[7] The whip-like tail bears a stinging spine and measures more than twice as long as the disc. Behind the spine, the tail becomes laterally compressed with a low keel above and a short, narrow fin fold below.[7]

There is a row of pointed tubercles running along the midline of the back from between the "shoulders" to the base of the tail. Two much shorter rows of smaller tubercles, slightly converging backward, are found alongside the central row behind the shoulders. Numerous small

dermal denticles are also found between the eyes and on the tail behind the spine.[8] The dorsal coloration varies from plain reddish-brown to dark gray, and the underside is light.[4][7] The extent of denticle coverage and number of oral papillae can vary among individuals.[6] The longtail stingray closely resembles the diamond stingray (H. dipterura), which is found in the same region, but can be distinguished by its lack of an upper tail fold. The length of the tail is not a reliable diagnostic character for this species, as it is frequently damaged.[1]

Biology and ecology

Apparently solitary in nature, the longtail stingray is a predator of

gestation period of 10–11 months, and may mate again immediately after. A litter contains 1–5 young, each measuring about 40 cm (16 in) across. Males mature sexually at 0.8 m (2.6 ft) across, and females at 1.1 m (3.6 ft) across.[1]

Human interactions

The tail spine of the longtail stingray is potentially dangerous to humans.

over-exploitation.[1]

References

  1. ^
    doi:10.2305/IUCN.UK.2020-3.RLTS.T60157A124445324.en.{{cite journal}}: CS1 maint: multiple names: authors list (link
    )
  2. ^ Catalog of Fishes (Online Version) Archived 2015-05-03 at the Wayback Machine. California Academy of Sciences. Retrieved on December 2, 2009.
  3. S2CID 85657403
    .
  4. ^
    ISBN 978-0-8248-1675-9
    .
  5. ^ Snodgrass, R.E. & E. Heller (1905). Shore Fishes of the Revillagigedo, Clipperton, Cocos and Galapagos Islands. The Academy. pp. 345–346.
  6. ^
    ISBN 978-0-8047-2289-6
    .
  7. ^ a b c Garman, S. (October 1880). "New species of selachians in the museum collection". Bulletin of the Museum of Comparative Zoology. 6 (11): 167–172.
  8. ^ Gilbert, C.H. & E.C. Starks (1904). "The Fishes of Panama Bay". Memoirs of the California Academy of Sciences. IV. Stanford University: 17–18.
  9. PMID 17877796
    .
  10. S2CID 10573826
    .
  11. PMID 8544069
    .
  12. S2CID 7438797
    .
  13. S2CID 83700913
    .
  14. PMID 17285847
    .
  15. S2CID 2977359
    .
  16. S2CID 37124160
    .
  17. doi:10.1017/S1755267208000304. Archived from the original
    (PDF) on 2011-07-21. Retrieved 2009-12-03.

External links

Wikimedia Commons has media related to Dasyatis longa.
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