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Danio kyathit vs. D. quagga
February 5, 2013
8:16 am
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Matt
Málaga, Spain
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Aquarium Glaser are currently selling the striped form of D. kyathit as D. quagga, but wasn't aware the id had been confirmed? Does anyone know more?

413612-danio-kyathit-mann.jpgImage Enlarger

413603-danio-quagga-maenner.jpgImage Enlarger

 

Cake or death?
February 5, 2013
4:36 pm
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mikev
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I'm sure you have this one....

February 5, 2013
9:31 pm
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Matt
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I have, and the fish does closely match the description. Just never seen the id confirmed 100% anywhere. 

Cake or death?
February 5, 2013
11:51 pm
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BillT
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Nice pictures. Interesting question. How would you confirm the species ID?

Color and stripes, morphology?

 

I went back and looked at the paper where quagga is described: Kullander, Liao and Fang. (2009). Danio quagga, a new species of striped danio from western Myanmar (Teleostei: Cyprinidae). Ichthyol. Explor. Freshwaters, Vol. 20, No. 3, pp. 193-199 (available on the web I think).

They distinguish it from the spotted form of kyathit from quagga by the stripes vs spots and also by the barbel length. I have found some pictures good for looking at barbel length. The quagga picture above has shorter barbels then the spotted kyathit in the above post, which conforms to the description. The few pictures of a stripe form of kyathit I have do not show the barbels well. Presumably the barbels on the striped kyathits should be similar to those of the spotted.

Other distinguishing features mentioned in the article are a variety of morphological length measurements (% of SL) most of which are overlapping distributions. There are slight differences in head length and pec fin length (quagga smaller for both). To me they both these comparisons look appropriate in the pictures.

Branched anal fin rays are supposed to be 12 or 13 in quagga and 13-14 in kyathit. I counted 14 in the spotted kyathit above and 12 in the striped fish but the front of the anal fin is not entirely clear.

 

It would be nice if we could get some of these fish in the US.

Bill Trevarrow [email protected]
February 6, 2013
8:15 am
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Matt
Málaga, Spain
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Hi Bill, same here really. The colour pattern matches the diagnosis but haven't yet seen an image where the barbels are clearly visible.

Provided the barbels also match the description the id should be relatively solid since they're the only two obvious external differences according to the paper. Ot at least, that's how I view it.

Cake or death?
February 6, 2013
10:02 pm
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torso
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Hi Matt

should I take some pics? Tried to work out with the older pics but they are not good enough.

My group has arrived mixed. Now they go with different names.

Cheers Charles

February 7, 2013
8:12 am
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Matt
Málaga, Spain
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Yes please Charles, that should help a lot. Smile

Cake or death?
June 18, 2013
10:23 pm
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torso
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I did it, Matt

As far as I can see: differences within the types. Sometimes shorter, sometimes longer. All in all they seem to be longer in the striped type. danio-sp-kyathit-CSC_7317.jpgImage Enlarger

danio-sp-kyathit-CSC_7313.jpgImage Enlarger
As they are to fast to get close-up pics I may show just pics of the entire specimen.

June 19, 2013
8:22 am
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Matt
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Hm, the barbels shouldn't reach beyone the eye in D. quagga. What's your feeling Charles?

Did you get some pics of the striped form as well?

Cake or death?
June 19, 2013
5:59 pm
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torso
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I have to check it, Matt.

My feeling? Same species. As far I can see, there are specimen with dotts and stripes. Either they already hybridized in the wild or it's the same species. Not D. quagga I would say.

June 20, 2013
10:03 am
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Matt
Málaga, Spain
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Ok thanks Charles, still can't decide myself. :-/

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