About: Minute Silurian oncocerid nautiloids with unusual colour patterns     Goto   Sponge   NotDistinct   Permalink

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Description
  • A minute Silurian oncocerid Cyrtoceras pollux, from Bohemia is assigned here to the genus Pomerantsoceras. The only so far known species of this genus comes from Ordovician of Estonia. Pomerantsoceras thus represents, except for un-revised poorly understood taxa, the single known oncocerid genus surviving the end-Ordovician extinction events. Colour pattern characterised by a few longitudinal bands on the entire circumference of the shell is here reported in oncocerids. Longicone and only slightly curved small shells as in Pomerantsoceras are unusual among nautiloids and resemble straight shells of orthocerids and pseudorthocerids, in which the colour pattern consists of straight colour bands. Consequently the shell shape as well as the colour pattern should be regarded as adaptive convergence with orthocerids and pseudorthocerids. It supports the hypothesis that colour pattern functioned as camouflage and its evolution was under adaptive control.
  • A minute Silurian oncocerid Cyrtoceras pollux, from Bohemia is assigned here to the genus Pomerantsoceras. The only so far known species of this genus comes from Ordovician of Estonia. Pomerantsoceras thus represents, except for un-revised poorly understood taxa, the single known oncocerid genus surviving the end-Ordovician extinction events. Colour pattern characterised by a few longitudinal bands on the entire circumference of the shell is here reported in oncocerids. Longicone and only slightly curved small shells as in Pomerantsoceras are unusual among nautiloids and resemble straight shells of orthocerids and pseudorthocerids, in which the colour pattern consists of straight colour bands. Consequently the shell shape as well as the colour pattern should be regarded as adaptive convergence with orthocerids and pseudorthocerids. It supports the hypothesis that colour pattern functioned as camouflage and its evolution was under adaptive control. (en)
Title
  • Minute Silurian oncocerid nautiloids with unusual colour patterns
  • Minute Silurian oncocerid nautiloids with unusual colour patterns (en)
skos:prefLabel
  • Minute Silurian oncocerid nautiloids with unusual colour patterns
  • Minute Silurian oncocerid nautiloids with unusual colour patterns (en)
skos:notation
  • RIV/00023272:_____/09:#0001101!RIV10-MK0-00023272
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(DE06P04OMG009), P(GA205/09/0260), P(GA205/09/0703), Z(MZP0002579801)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 326464
http://linked.open...ai/riv/idVysledku
  • RIV/00023272:_____/09:#0001101
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Cephalopoda; Nautiloidea; taxonomy; colour pattern; shell size; shell malformation; Silurian (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • PL - Polská republika
http://linked.open...ontrolniKodProRIV
  • [A6348367DD39]
http://linked.open...i/riv/nazevZdroje
  • Acta Palaeontologica Polonica
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 54
http://linked.open...iv/tvurceVysledku
  • Manda, Štěpán
  • Turek, Vojtěch
http://linked.open...ain/vavai/riv/wos
  • 000270574400013
http://linked.open...n/vavai/riv/zamer
issn
  • 0567-7920
number of pages
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