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Ptychocylis obtusa from the Chukchi Sea
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Ptychocylis obtusa from the Chukchi Sea
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Ptychocylis obtusa from the Chukchi Sea (Station 18 of the Araon Cruise 003)
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Ptychocylis obtusa from the Chukchi in 2012, Ara003 cruise St 50. This elongated morphotype was about half the population.
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Specimen without teeth or serrations on the lorica oral opening. From the Canada Basin in August 2013, cruise Ara04, St. 13.
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Specimen from the Canada Basin in August 2013, cruise Ara04, Station 15.
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From the Canada Basin in August 2013, St 15 of the ARA04 cruise.
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From the Canada Basin in August 2013, cruise ARA04, St 15
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From Station 13 of the ARA04 cruise to the Canada Basin in August 2013
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Specimen from the Canada Basin in August 2013. The lorica is slightlly longer than the average.
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Drawing from the original description by Brandt (1896). The black arrow showing length of 120 m is the median of the length range given in the text (pg 59). The grey arrow showing lorica oral diameter of 70 m (not given in the text) is based on the length value.
