Scoliodon - Wikipedia Scoliodon This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( June 2014 ) Scoliodon Pacific spadenose shark, ( Scoliodon macrorhynchos ) Scientific classification Kingdom : Animalia Phylum : Chordata Class : Chondrichthyes Order : Carcharhiniformes Family : Carcharhinidae Genus : Scoliodon J.P. Müller & Henle, 1838 Type species Scoliodon laticaudus Müller & Henle, 1838 Synonyms Physodon Valenciennes in Müller & Henle, 1838 Sharks portal Scoliodon is a genus of requiem shark, and part of the family Carcharhinidae. It was formerly thought to include only a single Indo - Pacific species, the spadenose shark ( S. laticaudus ), but recent taxonomic research has found two species, and the formerly excluded junior synonyms need to be resurrected. Contents 1 Habitat and distribution 2 Body 3 Species 4 References Habitat and distribution Like most sharks, Scoliodon is marine, and is found in all open seas. Body Scoliodon has an elongated, spindle - shaped, body tapered at the ends, making it a very fast swimmer. The trunk and tail are laterally compressed, while the head region is dorsoventrally compressed. The entire body is covered by an exoskeleton of placoid scales. The mouth is located on the ventral side and is bound on both sides by jaws. It has two rows of homodont or polyphyodont teeth, which are homologous to the placoid scales covering the body.It is a marine fish. Species Scoliodon laticaudus J.P. Müller & Henle, 1838 ( Spadenose shark ) Scoliodon macrorhynchos Bleeker, 1852 ( Pacific spadenose shark ) Extant requiem shark species Kingdom Animalia Phylum Chordata Class Chondrichthyes Subclass Elasmobranchii Subdivision Selachii Order Carcharhiniformes Carcharhinus Blacknose shark ( C. acronotus ) Silvertip shark ( C. albimarginatus ) Bignose shark ( C. altimus ) Graceful shark ( C. amblyrhynchoides ) Grey reef shark ( C. amblyrhynchos ) Pigeye shark ( C. amboinensis ) Borneo shark ( C. borneensis ) Copper shark ( C. brachyurus ) Spinner shark ( C. brevipinna ) Nervous shark ( C. cautus ) Pacific smalltail shark ( C. cerdale ) C. coatesi Whitecheek shark ( C. dussumieri ) Silky shark ( C. falciformis ) Creek whaler ( C. fitzroyensis ) Galapagos shark ( C. galapagenisis ) Pondicherry shark ( C. hemiodon ) Finetooth shark ( C. isodon ) Smoothtooth blacktip shark ( C. leiodon ) Bull shark ( C. leucas ) Blacktip shark ( C. limbatus ) Oceanic whitetip shark ( C. longimanus ) Hardnose shark ( C. macloti ) Blacktip reef shark ( C. melanopterus ) Dusky shark ( C. obscurus ) Caribbean reef shark ( C. perezi ) Sandbar shark ( C. plumbeus ) Smalltail shark ( C. porosus ) Blackspot shark ( C. sealei ) Night shark ( C. signatus ) Spot - tail shark ( C. sorrah ) Australian blacktip shark ( C. tilstoni ) C. tjutjot Galeocerdo Tiger shark ( G. cuvier ) Glyphis Borneo river shark ( G. fowlerae ) Ganges shark ( G. gangeticus ) Northern river shark ( G. garricki ) Speartooth shark ( G. glyphis ) Irrawaddy river shark ( G. siamensis ) Isogomphodon Daggernose shark ( I. oxyrhynchus ) Lamiopsis Broadfin shark ( L. temminckii ) Borneo broadfin shark ( L. tephrodes ) Loxodon Sliteye shark ( L. macrorhinus ) Nasolamia Whitenose shark ( N. velox ) Negaprion Sicklefin lemon shark ( N. acutidens ) Lemon shark ( N. brevirostris ) Prionace Blue shark ( P. glauca ) Rhizoprionodon Milk shark ( R. acutus ) Brazilian sharpnose shark ( R. lalandii ) Pacific sharpnose shark ( R. longurio ) Grey sharpnose shark ( R. oligolinx ) Caribbean sharpnose shark ( R. porosus ) Australian sharpnose shark ( R. taylori ) Atlantic sharpnose shark ( R. terraenovae ) Scoliodon Spadenose shark ( S. laticaudus ) Pacific spadenose shark ( S. macrorhynchos ) Triaenodon Whitetip reef shark ( T. obesus ) References Jump up ^ Scoliodon - animaldiversity. web Taxon identifiers Wd : Q249810 ADW : Scoliodon EoL : 25038 Fossilworks : 100438 GBIF : 2418223 ITIS : 160490 NCBI : 7816 WoRMS : 204232 This shark - related article is a stub. You can help Wikipedia by expanding it. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Scoliodon&oldid=825896468 '' Categories : Scoliodon Shark genera Taxa named by Johannes Peter Müller Taxa named by Friedrich Gustav Jakob Henle Shark stubs Hidden categories : Articles needing additional references from June 2014 All articles needing additional references Articles with ' species ' microformats All stub articles Talk Contents About Wikipedia Wikispecies Deutsch فارسی Français Nederlands پنجابی Polski Українська Edit links This page was last edited on 16 February 2018, at 01 : 39. About Wikipedia

Question: what type of scale is found in scoliodon
Answer: placoid