hillstream ID needed please

[mickthefish]

could the boffins have alook at these three species please.
i've looked in the species and am undecided.




thanks.
mick

[Jim Powers]

The spotted fish in the top pic are Gastromyzon ctenocephalus. The one in the middle with the marbled pattern is G. oscellatus. And the fish with the fine irregular spots/stripes in the second pic is G. stellatus.

[plaalye]

How can you tell that it's a ctenocephalus Jim? It looks more like scitilus to me but can't really see the dorsal and causal rays well enough.
I see stellatus like this and wonder if they interbreed with zebrinus, kind of in between? This one's not so much but some very nearly have stripes.

[mickthefish]

Thanks Jim mate, i kept on looking at the spotties but could'nt make my mind up.
the only one i got right was the ctenocephalus. haha

cheers
mick

[Jim Powers]

ctenocephalus have barbels that are much larger and more visible than scitulus.
Also, scitulus has larger (usually much larger) spots along the dorsal surface than along the side. The spots on ctenocephalus are uniform in size.
The stellatus are in the same Gastromyzon group(the ridens group) so they are very closely related just as ctenocephalus and scitulus are.
You should get Dr. Tan's Book. Its full of great info on these fish.

[plaalye]

Thanks for that Jim! Where can I find that book??

Sorry to hijack your thread Mick. Nice fish!!

[Jim Powers]

I'm not sure. I got mine from an Asian website. Sorry I can't remember the name. Maybe someone else can help. The book is called The Borneo Suckers by Tan Heok Hui.

[Mad Duff]

This may help: http://www.nhpborneo.com/onlinestore/pr ... asp?id=874

This is where I got my copy from and they do ship worldwide http://www.nhbs.com/the_borneo_suckers_ ... 46872.html

[plaalye]

Thanks guys! It's on my list.

[odyssey]

Hi Gastromyzon fancier!

I purchased the book from the Singaporean Internet Bookstore at the end of 2006.
I'm translating the book only partially yet.
However, you can buy even "amazon.com" now.
http://www.amazon.com/Borneo-Suckers-Ba ... 354&sr=1-1

The following my pictures may also be helpful.

G. ctenocephalus and G. scitulus



G. stellatus. and G. ctenocephalus


G. stellatus. and G. zebrinus



G. oscellatus and G. scitulus



The comparative pictures seen from the back.
Please pay attention to part of junction of pelvic fin in left and right.
The junction is away at G. stellatus. and G. zebrinus. But the junction of G. oscellatus , G. scitulus and G. ctenocephalus sticks.

G. oscellatus and G. scitulus (or cteno)


G. oscellatus and G. zebrinus (or stella)


G. scitulus(or cteno) , G. scitulus(or cteno)
G. zebrinus (or stella),G. oscellatus


I found mysterious Gastromyzon.sp by a site of the internet.
I'm very interested in these Gastromyzon.sp.

Neogastromyzon sp. Gastromyzon ??? A, B
http://www.aquaticquotient.com/forum/sh ... hp?t=24308

Gastromyzon.sp in sabah. The last picture of the page.
http://www.geocities.co.jp/AnimalPark-T ... sabah.html