World Library  
Flag as Inappropriate
Email this Article

Scalloped bonnethead

Article Id: WHEBN0006785330
Reproduction Date:

Title: Scalloped bonnethead  
Author: World Heritage Encyclopedia
Language: English
Subject: Carcharhiniformes, Sphyrnidae, Sphyrna, Atlantic weasel shark, Blackbelly lanternshark
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Scalloped bonnethead

Scalloped bonnethead
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Selachimorpha
Order: Carcharhiniformes
Family: Sphyrnidae
Genus: Sphyrna
Species: S. corona
Binomial name
Sphyrna corona
S. Springer, 1940
Range of the scalloped bonnethead

The scalloped bonnethead, Sphyrna corona, is a rare, little-known species of hammerhead shark, and part of the family Sphyrnidae. Its other common names include the mallethead shark and the crown shark.[1] It is found in tropical and subtropical waters in the eastern Pacific Ocean, from Mexico to Peru, and possibly as far north as the Gulf of California.[2] It frequents inshore habitats over soft bottoms (mud, sand, and gravel) to a depth of 100 m, and also enters mangroves and estuaries.[3]

Probably the smallest species of hammerhead shark, the scalloped bonnethead measures up to 92 cm long.[4] Its mallet-shaped head, called a "cephalofoil", is moderately wide (24-29% of total length) and elongated lengthwise. The front margin is broadly arched, with shallow lateral and medial indentations, and no prenarial grooves. The mouth is small and strongly arched. The anal fin is long and has a nearly straight rear margin. Its coloration is gray above and white below, with no prominent fin markings. The similar scoophead (Sphyrna media) can be distinguished by a shorter snout, broader mouth, and a deeply concave anal fin margin.[2]

Like other hammerheads, the scalloped bonnethead is viviparous, with presumably 2 pups per litter. The young are born at 23 cm or above; an adolescent male has been recorded at 51 cm long, and an adult at 67 cm. It may be taken by local inshore fisheries, but data is lacking.[2] It feeds on or near the bottom, on mobile crustaceans and molluscs, cephalopods, echinoderms, and bony fishes.[3]

References

  1. ^ a b Mycock, S.G. (2004). Sphyrna corona. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on October 24, 2008.
  2. ^ a b c Compagno, Leonard J. V. (1984) Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date. Food and Agricultural Organization. ISBN 92-5-101384-5.
  3. ^ a b "Sphyrnidae: Sphyrna corona". Discover Life. Retrieved on October 24, 2008.
  4. ^ Froese, Rainer and Pauly, Daniel, eds. (2008). "Sphyrna corona in FishBase. October 2008 version.

External links

  • Species Description of Sphyrna corona at www.shark-references.com
  • http://researcharchive.calacademy.org/research/Ichthyology/Types/index.asp?xAction=Search&Family=Sphyrnidae&RecStyle=Full&PageStyle=Multiple&OrderBy=Family,%20TypeName,%20CatNum
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.