Class – Chondrichthyes Subclass – Elasmobranchii Superorder
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| Myliobatiformes Greek - Mylio- (molar, milestone) and bati- (the ray fish)
Class – Chondrichthyes Subclass – Elasmobranchii Superorder - Euseachii Order - Myliobatiformes Families – Dasyatidae (stingrays, whiprays, whiptail stingrays, whip-tail stingrays), Gymnuridae (butterflyray), Hexatrygonidae (sixgill stingrays), Mobulidae (mantas, mantes, devil rays, mantas), Myliobatidae (eagle rays) Plesiobatidae (deepwater stingrays, giant stingarees), Potamotrygonidae (river stingrays), Rhinopteridae (cow-nose rays, cownose rays), Urolophidae (round sting rays, stingarees) 27 genera – 178 species - No Vermont species Description – Stingrays - oval to triangle shape of body with wings. Most species have barbed tails containing poison. There are 5 gill slits present in all the families except the Hexatrygonidae family, which have 6 gill slits. They are ovoviviparous, which means the eggs develop within the mothers body until they are ready to be hatched. Habitat – Mainly marine species, some resided in brackish waters however there are species located in rivers, which have lost their ability to osmoeregulate. The river species are found within the Potamotrygonidae family. Distribution – Temperate to tropical waters, found in Atlantic, Pacific and Indian oceans. Ecology and life history – Most are bottom dwellers and specialize in foraging for mollusks and crustaceans. Some feed on plankton and others feed in open water and mainly prey on squids. Additional details – The largest stingray is called Manta Ray (Manta birostris) with a 22 feet wingspan and is a filter feeder. While the Myliobatiformes order is relatively docile, some injuries have been reported from divers, mainly bites called “stingray hickies” because they do not have sharp teeth. Other reports include injuries from their poisonous stingers, which can result in death. Recent research – Borsa P., Arlyza I.S., Laporte M., Berrebi P. Population genetic structure of blue-spotted maskray Neotrygon kuhlii and two other Indo-West Pacific stingray species (Myliobatiformes: Dasyatidae), inferred from size-polymorphic intron markers (2012) Journal of Experimental Marine Biology and Ecology, 438 , pp. 32-40. References used – R. Aidan Martin. N.d. Batoids: order Myliobatiformes: Stringrays – 178 species. Biology of Sharks and Rays. 1/31/13 Web http://www.elasmo-research.org/education/shark_profiles/myliobatiformes.htm Compagno, Leonard J. V. Hamlett, William C., ed. (1999) “Sharks, Skates, and Rays: The Biology of Elasmobranch Fishes” Johns Hopkins University Press. pg 471-498. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=649685 Directory: rsenr -> wfb232 -> Orders Orders -> Class: Actinopterygii Order: Lampridiformes Families wfb232 -> Wfb 232 Ichthyology Taxonomy, Week 7 14 March 2005 Download 7.31 Kb. Share with your friends:
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