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Homaloptera spp.

Home Forums Fresh and Brackish Water Fishes Homaloptera spp.

Viewing 15 posts - 76 through 90 (of 90 total)
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  • #345534

    wasserscheu
    Participant

    A question re the Homaloptera Orthog./Confuz. types, caudal-lower-fin-rays.

    I have one (and still only) chap that more ore less often leans in the corner upstraight like a wood branch, it appears a relaxed position. I wondered how it can stand on it’s lower tip of the caudal fin?
    After trying to watch/analyse the fin rays, I kind of interprete a thicker last (or last 2) finray, (which looks a bit like a sting = interpreted). That would explain how it can stand on it so easily.
    Has anybody any close-up’s of such tails, fin-rays?

    #345661

    wasserscheu
    Participant

    Tried to get some Tail Pictures, but could not catch a fully spread one … it’s leaning in the corner staright up like a broom-stick is weird.

    #345663

    Matt
    Keymaster

    Hmm the rays do look slightly thickened towards the margin of the fin. Don’t recall this being mentioned in any paper though?

    #314819

    Matt
    Keymaster

    Just resurrecting the smithi/tweedei thing having realised we never mentioned colour pattern. H. smithi should have at least 6 dark saddles on the dorsal surface according to Rainboth while Herre states that H. tweediei has only 4.

    These characters do seem applicable to the fish in our images but unsure how reliable they are?

    #349620

    Matt
    Keymaster

    Confused again. The new paper by Randall and Page states that H. smithi has 17-18 total pectoral-fin rays and H. tweediei always 13 which seems odd?

    Also think that sp. ‘H01’ is H. leonardi for sure. Here’s a pic of a confirmed specimen by Nonn. Everyone ok if I update the profile?

     

    Homaloptera-leonardi.jpg

    #349681

    Plaamoo
    Participant

    Here’s a recent one of mine. They don’t like their picture taken.

    http://i192.photobucket.com/albums/z229/bigsky_photos/DSC_4674_zpsf8bee3fa.jpg

     

    As to the smithi/tweediei that does reverse our previous conclusions. That makes mine smithi.:?

     

    http://i192.photobucket.com/albums/z229/bigsky_photos/hsmithipec2-1_zps869e409c.jpg

    #349701

    Matt
    Keymaster

    Great pics Jim!

    Yeah the smithi/tweedei thing is confusing, and conflicts with information from earlier papers. Unsure what to do.:?

    #349721

    Matt
    Keymaster

    Jim, is the fish in these new pics the same as the one pictured in this thread? https://www.seriouslyfish.com/forums/freshwater-and-brackish-water-fishes/homaloptera-sp-yunnanensis/

    #349722

    Plaamoo
    Participant

    Yes Matt, maybe not the same specimen?. I have 5 or 6, and I picked them from more than one shipment, but I think they are all the same.

     

    The close-up of the fin is from smithi/tweedei

    #349725

    Kajsa12
    Participant

    Hi Matt and Jim,

     

    How many unbranched pectoral fin rays does H. leonardi have?

     

    Apparently I’ve lost my close up pictures, but I think I did count 6 at the time. At least in one of the two H01.

    Unfortunately I don’t have these Homaloptera anymore, so hopefully Jim can try to get a decent picture. (I know it’s difficult:smile:)

    #349729

    Plaamoo
    Participant

    Hi Henri, Happy New Year!

    Difficult for sure! I never see them on the glass. Here is a crop & zoom on one of my first pics with them in a bucket. It’s not easy to count but I get 13 or 14 total, I think:? It’s really difficult to see branched or not. They all look branched on the top fin?

    http://i192.photobucket.com/albums/z229/bigsky_photos/1crop_zps4ec88dfa.jpg

    #349730

    Matt
    Keymaster

    Cheers Jim. :)

    Henri, H. leonardi should have 6 unbranched rays, H. sexmaculata 2, and H. yunnanensis 7.

    #349732

    Kajsa12
    Participant

    I think I can count 6 unbranched rays in your fish also, Jim.

     

    A happy New Year to all of you.:smile:

    #349888

    Plaamoo
    Participant

    “The new paper by Randall and Page states that H. smithi has 17-18 total pectoral-fin rays and H. tweediei always 13 “

     

    Do you have this paper Matt?

    #349890

    mikev
    Participant

    Matt is referring to this paper:

    http://www.mapress.com/zootaxa/2012/f/zt03586p346.pdf

    I have really mixed feelings about it…. the world may have been better off if it were not written at all.

Viewing 15 posts - 76 through 90 (of 90 total)

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