Narcine is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of small electric ray

Electric ray

The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins, comprising the order Torpediniformes. They are known for being capable of producing an electric discharge, ranging from as little as 8 volts up to 220 volts depending on species, used to stun prey and...

s in the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Narcinidae

Narcinidae

The numbfishes are a group of electric rays in the family Narcinidae. They are bottom-dwelling cartilaginous fishes with large, rounded pectoral fin discs and long tails...

.

Description

Narcine species have a rounded pectoral fin disc and two dorsal fins, the first usually smaller than the second and placed behind the pelvic fin bases. The tail is longer than the disc and has a lateral fold. The spiracle

Spiracle

Spiracles are openings on the surface of some animals that usually lead to respiratory systems.-Vertebrates:The spiracle is a small hole behind each eye that opens to the mouth in some fishes. In the primitive jawless fish the first gill opening immediately behind the mouth is essentially similar...

s are close behind the eyes; the nasal flaps are merged into a flap in front of the mouth. The teeth are nearly flat, with a central point.

Species

• Narcine atzi M. R. de Carvalho & Randall, 2003
• Narcine bancroftii (E. Griffith & C. H. Smith
  Charles Hamilton Smith
  Lieutenant-Colonel Charles Hamilton Smith was an English artist, naturalist, antiquary, illustrator, soldier and spy.-Military service:...
  
  , 1834) (Lesser electric ray)
• Narcine brasiliensis (Olfers
  Ignaz von Olfers
  Ignaz Franz Werner Maria von Olfers was a German naturalist, historian and diplomat. Olfers was born in Münster. In 1816 he travelled to Brazil as a diplomat....
  
  , 1831) (Brazilian electric ray)
• Narcine brevilabiata Bessednov, 1966 (Shortlip electric ray)
• Narcine brunnea Annandale
  Nelson Annandale
  Thomas Nelson Annandale CIE was a Scottish zoologist, entomologist and anthropologist.The eldest son of Thomas Annandale, the regius professor of clinical surgery at the University of Edinburgh, Nelson was educated at Rugby School, Balliol College, Oxford, and the University of Edinburgh.Annandale...
  
  , 1909 (Brown numbfish)
• Narcine entemedor D. S. Jordan
  David Starr Jordan
  David Starr Jordan, Ph.D., LL.D. was a leading eugenicist, ichthyologist, educator and peace activist. He was president of Indiana University and Stanford University.-Early life and education:...
  
   & Starks
  Edwin Chapin Starks
  Edwin Chapin Starks was an ichthyologist most associated with Stanford University. He was known as an authority on the osteology of fish. He also did studies of fish of the Puget Sound. Additionally his wife and daughter were both involved in either science or natural history....
  
  , 1895 (Giant electric ray)
• Narcine insolita M. R. de Carvalho, Séret & Compagno, 2002
• Narcine lasti M. R. de Carvalho & Séret, 2002
• Narcine leoparda M. R. de Carvalho, 2001
• Narcine lingula Richardson
  John Richardson (naturalist)
  Sir John Richardson was a Scottish naval surgeon, naturalist and arctic explorer.Richardson was born at Dumfries. He studied medicine at Edinburgh University, and became a surgeon in the navy in 1807. He traveled with John Franklin in search of the Northwest Passage on the Coppermine Expedition of...
  
  , 1846 (Chinese numbfish)
• Narcine maculata (G. Shaw
  George Shaw
  George Shaw was an English botanist and zoologist.Shaw was born at Bierton, Buckinghamshire and was educated at Magdalen Hall, Oxford, receiving his M.A. in 1772. He took up the profession of medical practitioner. In 1786 he became the assistant lecturer in botany at Oxford University...
  
  , 1804) (Darkfinned numbfish)
• Narcine nelsoni M. R. de Carvalho, 2008 (Eastern Numbfish)
• Narcine oculifera M. R. de Carvalho, Compagno & Mee, 2002
• Narcine ornata M. R. de Carvalho, 2008
• Narcine prodorsalis Bessednov, 1966 (Tonkin numbfish)
• Narcine rierai (Lloris & Rucabado, 1991) (Slender electric ray)
• Narcine tasmaniensis J. Richardson
  John Richardson (naturalist)
  Sir John Richardson was a Scottish naval surgeon, naturalist and arctic explorer.Richardson was born at Dumfries. He studied medicine at Edinburgh University, and became a surgeon in the navy in 1807. He traveled with John Franklin in search of the Northwest Passage on the Coppermine Expedition of...
  
  , 1841 (Tasmanian numbfish)
• Narcine timlei (Bloch
  Marcus Elieser Bloch
  Marcus Elieser Bloch was a German medical doctor and naturalist. He is generally considered one of the most important ichthyologists of the 18th century.- Life :...
  
   & Schneider
  Johann Gottlob Schneider
  Johann Gottlob Theaenus Schneider was a German classicist and naturalist.-Biography:Schneider was born at Collm in Saxony...
  
  , 1801) (Blackspotted numbfish)
• Narcine vermiculatus Breder, 1928 (Vermiculate electric ray)
• Narcine westraliensis McKay, 1966 (Banded numbfish)