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Nannostomus species?

Home Forums Fresh and Brackish Water Fishes Nannostomus species?

This topic contains 0 replies, has 1 voice, and was last updated by  Matt 5 years, 6 months ago.

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #302439

    Matt
    Keymaster

    Has anyone seen this one before? N. grandis perhaps?

    Nannostomus-cf-beckfordi.jpg

    #349184

    Graham Ramsay
    Participant

    From : http://www.vertebrate-zoology.de/vz61-3/01_Vertebrate_Zoology_61-3_Zarske_283.pdf

    Ventral fins colourless in N. grandis spec. nov. vs. with milky white tips in N. beckfordi

    I think these are nicely coloured N. beckfordi

    #349186

    martin.piranha
    Participant

    N. beckfordi is correct.

    Martin

    #349191

    Matt
    Keymaster

    Ok thanks guys – added pic to the profile.

    #349218

    Matt
    Keymaster

    Is this Nannostomus marilynae?

    Nannostomus-digrammus-HW.jpgNannostomus-digrammus-2-HW.jpg

    #349219

    Graham Ramsay
    Participant

    @matt said:
    Is this Nannostomus marilynae?

    N. marilynae should have a tertiary horizontal stripe which these fish appear to lack. I think these are N. digrammus.

    http://www.sil.si.edu/smithsoniancontributions/zoology/pdf_hi/sctz-0186.pdf

    #349220

    Matt
    Keymaster

    That’s what the pics were labelled as so perfect. Thanks Graham.

    #349234

    Matt
    Keymaster

    This one looks like Nannostomus anduzei with guanine deposits in the skin?

    Nannostomus.jpg

    #349236

    martin.piranha
    Participant

    @matt said:
    This one looks like Nannostomus anduzei with guanine deposits in the skin?

     

    2xno. But maybe N. digrammus.

     

    Martin

    #349239

    Graham Ramsay
    Participant

    N. anduzei lacks an adipose fin which (I think) this individual has. There is a white specimen at this link:

     

    http://www.aqualifestyle-france.com/t2873-nannostomus-anduzei-blanc

    #349242

    Matt
    Keymaster

    Ok thanks again chaps, should I add it to the N. digrammus profile then?

    Something interesting about N. rubrocaudatus. ‘Saramirisa at the banks of the Marañón (upper Amazon river) between the rivers Morona and Santiago’, the locality given by Glaser’s as collection point for this species, is hundreds of kilometers from Iquitos and around 2500 m AMSL in the lower Andes.

    I’m not convinced a Nannostomus sp. would be found at this kind of altitude. Does anyone know more?

    Also, what kind of nocturnal patterning do N. marginatus, N. mortenthaleri, and N. rubrocaudatus display?

    #349258

    Graham Ramsay
    Participant

    Matt said

    Also, what kind of nocturnal patterning do N. marginatus, N. mortenthaleri, and N. rubrocaudatus display?

     

    Not much difference to normal – just a little faded.

    #349260

    Matt
    Keymaster

    That’s great, cheers Graham.

    #349765

    Matt
    Keymaster

    Matt said 
    Something interesting about N. rubrocaudatus. ‘Saramirisa at the banks of the Marañón (upper Amazon river) between the rivers Morona and Santiago’, the locality given by Glaser’s as collection point for this species, is hundreds of kilometers from Iquitos and around 2500 m AMSL in the lower Andes.

    I’m not convinced a Nannostomus sp. would be found at this kind of altitude. Does anyone know more?

    Got this totally messed up and have been gratefully corrected. The source used for the info about Saramiriza was written in a confusing way and the settlement is actually in a lowland plain east of the Andes mountains, but can be reached by a pass that crosses them at approx. 2500 AMSL.

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