Renal organs of cephalopods: a habitat for dicyemids and chromidinids

Journal of Morphology
Hidetaka FuruyaKazuhiko Tsuneki

Abstract

The renal organs of 32 species of cephalopods (renal appendage of all cephalopods, and renal and pancreatic appendages in decapods) were examined for parasite fauna and for histological comparison. Two phylogenetically distant organisms, dicyemid mesozoans and chromidinid ciliates, were found in 20 cephalopod species. Most benthic cephalopods (octopus and cuttlefish) were infected with dicyemids. Two pelagic cephalopod species, Sepioteuthis lessoniana and Todarodes pacificus, also harbored dicyemids. Chromidinid ciliates were found only in decapods (squid and cuttlefish). One dicyemid species was found in branchial heart appendages of Rossia pacifica. Dicyemids and chromidinids occasionally occurred simultaneously in Euprymna morsei, Sepia kobiensis, S. peterseni, and T. pacificus. The small-sized cephalopod species, Idiosepius paradoxus and Octopus parvus, harbored no parasites. Comparative histology revealed that the external surface of renal organs varies morphologically in various cephalopod species. The small-sized cephalopod species have a simple external surface. In contrast, the medium- to large-sized cephalopod species have a complex external surface. In the medium- to large-sized cephalopod species, their juveniles ha...Continue Reading

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Citations

Jul 14, 2007·The Journal of Parasitology·Kazutoyo OginoHidetaka Furuya
Apr 1, 2008·The Journal of Parasitology·Hidetaka Furuya
Mar 5, 2008·The Journal of Parasitology·Kazutoyo OginoHidetaka Furuya
Jun 26, 2008·The Journal of Parasitology·Hidetaka Furuya
Jan 6, 2010·The Journal of Parasitology·Hidetaka Furuya
Oct 23, 2008·The Journal of Parasitology·Hidetaka Furuya
Dec 17, 2010·The Journal of Parasitology·Hidetaka Furuya
Apr 22, 2011·The Journal of Parasitology·Kazutoyo OginoHidetaka Furuya
Mar 4, 2011·EMBO Reports·Simon Conway Morris
Sep 10, 2014·International Journal for Parasitology. Parasites and Wildlife·Sarah R CatalanoBronwyn M Gillanders
Aug 18, 2016·Parasite : Journal De La Société Française De Parasitologie·Dhikra SouidennePhilippe Grellier

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