Based on your info, the photo may not be the typical sychri. This presses the question about the stocklist which Erik has - it mentions sychri, not sychri luminoso. In that case, it's probably the typical sychri.CLOG wrote:Often confused with C97. In C. sychri the head shape is longer, with a distinct angular profile from dorsal to top of head above the eye and then down to the snout. Some specimens may even show a curve to the snout, making it more of a saddle shape.
And if I recall correctly, don't all of these come from approximately the same area? I mean, these aren't simply being distinguished by locale, right? Indeed.pleconut wrote:And also that locals catching fish may have names for fish they catch for aquatic industry adding more into the confusion.
yes, they all come from the area around Iquitos.bekateen wrote:And if I recall correctly, don't all of these come from approximately the same area? I mean, these aren't simply being distinguished by locale, right?
In this case, the challenges for me are (1) the length of the snout, which is influenced by camera angle and the way the fish is using its mouth at the time of photography, and (2) interpreting how important species variability is with regard to coloration.Coryman wrote:Personally I think thr RA picture is C. atropersonatus... The spotting in both C. atropersonatus and C97 are similar well defined rounded well spaced spots, in C. sychri and C53 the marking are more like small irregular blotches and tend to be more compacted.
same with me, the snout shape is difficult to see; could also be C. atropersonatus but the pattern would be odd then...bekateen wrote:I interpreted the Ruinemans photo as showing a fish with a medium-long length snout, not a short snout, although I can easily imagine this being a short-snouted fish too if the camera angle is right.
Afaik our C. atropersonatus usually don't come from Rio Tigre system.Dorsal fin with dark brown to black pigment at its base. One or two rows of relatively thin, more or less horizontal dark bands on dorsal fin; pigment of these rows confined to fin rays.
On the CLOG page, images 3, 7, and 10 show the two parallel, roughly horizontal (somewhat downward sloping towards the rear) lines, on the dorsal fins (only on the rays), as you mention in the species description; and there maybe just a hint of them in image 13 as well.kamas88 wrote:By the way "our" C. atropersonatus deviates from the first description of the species (from Ecuador) which should have:Dorsal fin with dark brown to black pigment at its base. One or two rows of relatively thin, more or less horizontal dark bands on dorsal fin; pigment of these rows confined to fin rays.
