Rhinobatos obtusus   Muller & Henle,  1841 (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Rajiformes
Family:Rhinobatidae

Image copyrights: Devarapalli, P.

Description
Size: 23-180 cm TL

Color: Body gray to brownish above, white below; large specimens have occasionally black blotches on back.

Snout short and narrow, obtusely pointed, margins scarcely concave; rostral ridges separated by a considerable interspace for most of their length, slightly expanded towards tip. Eye about 7.0 times in snout length, 2.5 in interorbital width. Width of mouth 1.8 in preoral length, more than internarial distance, about 1.9 in snout length. Nostrils wide, oblique, about half width of mouth, equal to internarial distance; anterior nasal flap extending beyond level of inner end of nostril. Spiracle with only one skinny projection from hind margin. Back with small tubercles, some spiniform.

Dioecious, internal (oviduct) fertilization, internal live bearers. Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialized structures.


Synonym (s)
Rhinobatos obtusus Muller & Henle, 1841
(Senior synonym)
Rhinobatos (Rhinobatos) obtusus Muller and Henle, 1841
Rhinobatos halavi Day (nec Forsskal), 1878
Rhinobatos obtusus Misra, 1969

Common Name (s)
• Grey Guitarfish (English)
• Lanj (Marathi)
• Padangan (Tamil)
• Pare (Tamil)
• Suttuwarah (Telugu)
• Widenose Guitarfish (English)
Economic Importance and Threats
Importance:  Commercial
(Fisheries)
Threats:  Anthropogenic
(Subject to generally unregulated, unmonitored and often intense inshore fisheries.)

Ecology
Habitat:  Demersal, Coastal
IUCN Status:  Vulnerable

Biogeography


• Pondicherry (Lat: 11.93) (Long: 79.85) INDIA
• Pondicherry, Karaikal INDIA
• Andhra Pradesh, Vishakhapatnam INDIA (Record: 00/10/1999-00/11/2000)
• INDIA (Record: 1984)
• Kerala INDIA
• Red Sea
• Bay of Bengal INDIA
• Pondicherry INDIA
• West Coast, Malabar INDIA
• West Bengal (Lat: 21.45) (Long: 87.9) INDIA

Literature Source(s)
  • Mishra, SS and Krishnan, S (2003) Marine fishes of Pondicherry and Karaikal Records of the zoological survey of india ZSI 53 pp Available at - NCL, Pune
  • Sujatha, K (2002) Batoid fishes off Visakhapatnam, north east coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 44(1 & 2) 155-162 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • (2003) IUCN Red list of threatened species Available at - http://www.iucnredlist.org/
  • Talwar, PK and Kacker, RK (1984) Commercial sea fishes of India ZSI, Calcutta 997 pp Available at - NIO, Goa
  • Bijukumar, A and Deepthi, GR (2009) Mean trophic index of fish fauna associated with trawl bycatch of Kerala, southwest coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 51(2) 145 - 154 Available at - NIO, Goa
  • Raje, SG; Sivakami, S; Mohanraj, G; Manoj Kumar, PP; Raju, A and Joshi, KK (2007) An atlas on the Elasmobranch fishery resources of India CMFRI Special publication CMFRI, Cochin, India. 95 253pp Available at - http://eprints.cmfri.org.in/4056/1/Special_Publn_95.pdf
  • Das, P; De, SP; Bhowmik, RM; Pandit, IK; Sengupta, R; Nandi, AC; Thakurta, SC and Saha, S (2007) Piscine diversity of West Bengal Fishing chimes 27(5) 15-28 Available at - NIO, Goa

Page last updated on:2012-01-02

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