Plankton Portal Talk

Subject: APK0004obe

Subject APK0004obe Full subject data (JSON)

Comments

  • kirstenr by kirstenr

    cydippid or larval lobate? Any hints for telling the two apart?

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  • yshish by yshish moderator, translator

    it is a #cydippid, perhaps a #mertensid sp.? the differences, hmm.. lobates appears quite opaque and without tentacles when adult.

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  • yshish by yshish moderator, translator

    but cydippids can have the tentacles retracted. @bgrassian will be able to tell you better than me:) hope he'll show up soon to answer you.

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  • bgrassian by bgrassian scientist

    yes this is a #cydippid (Metensid sp. for sure!)... the body is acorn shaped and there are two tentacles visible here

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  • bgrassian by bgrassian scientist

    the lobate species of ctenophores are in general more spherical than ovular/acorn shaped. they also do not have tentacles ...cont ->

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  • bgrassian by bgrassian scientist

    and also, the lobes used for foraging are visible, either making the body appear divided (think pac-man!) or are pressed together making...

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  • bgrassian by bgrassian scientist

    it appear like two outward appendages on the bottom/oral end of the critter. in general on the site, the lobates tend to be bigger

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  • bgrassian by bgrassian scientist

    try searching #lobate on boards and see the guys that were tagged! ( =

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  • yshish by yshish moderator, translator

    comprehensive answer, thanks!

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  • kirstenr by kirstenr

    1/2
    I guess my question arose from identifying something as a cydippid that turned out to be a larval lobate (wtih tentacles.)

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  • kirstenr by kirstenr

    2/2 My question was: How do you tell LARVAL lobates from cydippids?

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  • bgrassian by bgrassian scientist

    a mertensid ctenophore. Larval lobates can be distinguished from true cydippids with much certainty.

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  • bgrassian by bgrassian scientist

    larval lobates have a "clasped" body, with marked ctene rows extending the whole body,and paird tentacles coming off ...

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  • bgrassian by bgrassian scientist

    ...the aboral end at ~45 degree angles with evenly spaced narrow/small branching tentacles. The body is most useful in the ID

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