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2020-02-01 - Colloque/Présentation - communication orale - Anglais - 10 page(s)

GRACE M.A., Doosey M.H., Denton J.S.S., Naylor G.J.P., Bart H.L.Jr., Maisey J.G., Delroisse Jérôme , "A New Species of Kitefin Shark (Squaliformes: Dalatiidae: Mollisquama mississippiensis) from the Gulf of Mexico" in 45th Annual Meeting of the Mississippi Chapter of the American Fisheries Society, Jackson, USA , 2020

  • Codes CREF : Biologie moléculaire (DI3111), Biologie (DI3100), Sciences exactes et naturelles (DI1000), Ecologie (DI3123), Zoologie générale (DI3160)
  • Unités de recherche UMONS : Biologie des Organismes Marins et Biomimétisme (S864)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
  • Centres UMONS : Biosys (BIOSYS)
Texte intégral :

Abstract(s) :

(Anglais) A new Western North Atlantic Ocean species of kitefin shark, Mollisquama mississippiensis sp. nov., was captured during a NOAA/NMFS midwater trawling survey to assess predator/prey trophodynamics for sperm whales (Physeter microcephalus). The new species designation is based on five diagnostic features not found on the only other known pocket shark specimen — Mollisquama parini Dolganov that was captured in the eastern South Pacific Ocean. Diagnostic features include a putative pit organ, photophores irregularly distributed along many areas of the body, 16 distinct ventral-abdominal photophore aggregations, and two differences associated with the dentition. Other potential diagnostic features are 10 fewer vertebrae than Mollisquama parini and six morphometric proportional differences that exceeded +/- 20%. The unique pocket gland that produces and expels luminous fluid was examined with high-resolution synchrotron scans and by histological analysis.