Pteroplatytrygon violacea   Bonaparte  1832 (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Rajiformes
Family:Dasyatidae

Image copyrights: Ann Hecht

Description
Size: 91cm in total length

Weight: 2.5kg

Dorsal surface is characterised by head with well developed opercular and stomach regions; body covered with slimy mucous with single spine in the tail; single row of 47 tubercles facing downward runs through the middle of the body. Eyes with thick eyelid, eye width measured 2.9 cm and eye diameter 2.3 cm; body broad and disc wedge shaped; upper side of the disc 26cm and lower 27 cm. Snout rudimentary in nature; two spiracles with 2.5 cm width and 3.0 cm length separated by 3.8 cm. Second dorsal fin small and oar shaped with a base length of 5 cm and height of 5.5 cm. Mouth transverse, narrow, slightly arched and with labial fold. The length of the labial fold is 4.3 cm and its height 1.7 cm. Several rows of teeth present in the mouth. Overall width the mouth is 5. 5 cm. Ventral spiracle opens 0.8 cm above mouth, each one with width of 0.4 cm separated by a distance of 3.8 cm. Five pairs of gill slits and the inner space between first, second, third, fourth and fifth gill slits are 10.1, 9.7,9.3, 8.6, and 7.9 cm respectively. The length from snout to first, second, third, fourth and fifth gill slits are 9.8, 11.1,12.2, 13.4 and 14.8 cm respectively.

females need to have more space in body cavity in order to accommodate female reproductive organs as well as accessory organs associated with ovo-viviparity. Embryos initially feed on yolk and later obtain additional nourishment from the mother by indirect absorption of uterine fluid enrichd
with mucus, fat and protein through specialised structures.


Synonym (s)
Dasyatis atratus Ishiyama & Okada, 1955
Dasyatis guileri Last, 1979
Dasyatis purpurea Müller & Henle, 1841
Dasyatis purpureus Müller & Henle, 1841
(Misspelling)
Dasyatis violacea Bonaparte,
(1832)
Trygon purpurea Müller & Henle, 1841
Trygon violacea Bonaparte, 1832

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Pelagic

Biogeography


• East Coast INDIA

Literature Source(s)
  • Zacharia, PU; Joshi, KK and Kandan, P (2011) First record of the pelagic stingray Pteroplatytrygon violacea (Boneparte, 1832) (Family: Dasyatidae) from the east coast of India Indian Journal of Fisheries Central Marine Fisheries Research Institute, kochi 58(1) 95-98 Available at - http://eprints.cmfri.org.in/8476/1/IJF_Zacharia_95-98.pdf
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Biodiversity explorer: The web of life in Southern Africa Available at - http://www.biodiversityexplorer.org/search.htm

Page last updated on:2011-09-19

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