New Stingray discovered, w/pics!

[joechua]

Great Info davo!



Do I understand this correct, the rays we call motoro may be many different species? And if we breed with motoro from different locations these could be different species and the pups are hybrids.

Yes, even common motoro have alot of variant from different area . Here is a link of Ray , where u can see even common motoro have a few variant.

http://www.goslinea.com/Gallerie/Rochen/INDEX.HTM

 

[davo]

I can't imagine how motoros will turn out, whether they are geographical variances amongst the same species, or whether they are seperate species, but by the sound of it, they might be different species amongst what we call motoro. Or subspecies would make sense.

 

[T1KARMANN]

looks like motoro to me

the colors maybe diffrent because its dead

 

[T1KARMANN]

Great Info davo!



Do I understand this correct, the rays we call motoro may be many different species? And if we breed with motoro from different locations these could be different species and the pups are hybrids.

no not really

if a man from china has a baby with a women from africa that would make the hybrids would it

 

[davo]

How was P. motoro described? What tests did they use to distinguish the species?

 

[T1KARMANN]

How was P. motoro described? What tests did they use to distinguish the species?

that chould be said about any kind of fish

 

[rayman]

Hi davo,

How was P. motoro described? What tests did they use to distinguish the species?

here is the original description of P. motoro, it was published in "Systematische Beschreibung der Plagiostomen" From Joh. Müller, Jacob Henle, 1841 p. 197, 198

http://books.google.de/books?id=ZnXX0ukaCuAC&pg=PA143&source=gbs_toc_r&cad=0_0#PPA197,M1

Translation with Google:

Taeniura motoro N Nova Species
Raja motoro Natterer
Disc oval almost entirely around the rear corners of the chest fins and the abdominal fins quite rounded tail length equal to the length of the tail wheel, the upper half as high as the tail starts behind the barbed begins at the bottom of the sting and is the highest so high Theil The tail than the upper teeth eyes song beaked flat in the bottom five foot three cones in the middle of the two sides.

The upper surface of the disc and the tail, with the exception of the rough edge The Rauhigkeiten fins on the back and tail of the most star on the basis Schwanzfirste to sting a series of strong curved spines, with a round base at age copies put it on the hintern Theil The fort Rückenfirste sides of the tail are also rough until the end of the disk sub-surface smooth.

Brown color with a lot of round yellow spots on the upper side of the disc and the underside of the tail light disc against the size of the fins and dark here with similar spots like at the top but the bottom pale tail also spotted on the sides alternately light and dark.

Three specimens from the river Cuyaba in Brazil in wine spirit in imperial Naturalienkabinet in Vienna by Natterer.

One in these circumstances quite similar copy as a rough it with the same spikes on the tail end of the war had aborted the top jantarno with big round orange stain with an enclosed ring black/brown are the top of the tail is a copy of this high bony at Kiel What the upper fin underside of the tail with bright spots on dun kehn sides basically bright and dark patches.

From this copy could be at the tail end of the shortage seyn doubtful whether there was a Trygon Trygon Hystrix or Taeniura motoro is Trygon Hystrix however, was itself only with abgebrochenem tails observed and it can probably seyn that Trygon Hystrix belong to Taeniura motoro.

Still found two dry to Taeniura motoro migrating to a smaller specimens from the Guapore a large with a 30 inch long slice from the Cuyaba

 

[fishboykaps]

I have heard motoro could possibly be split up into multiple species from a Ray taxonomist . I dont think color is the best distinguishing feature, the teeth would be much better.

 

[davo]

Hi davo,



here is the original description of P. motoro, it was published in "Systematische Beschreibung der Plagiostomen" From Joh. Müller, Jacob Henle, 1841 p. 197, 198

http://books.google.de/books?id=ZnXX0ukaCuAC&pg=PA143&source=gbs_toc_r&cad=0_0#PPA197,M1

Translation with Google:

Thank you very much rayman! I wondered whether or not it used more modern techniques of identifying (other than colour pattern/visual). Cheers

 

[Miles]

I think this is pretty significant because of this;

http://www.stingraysource.com/StingraySource/dreamline/habitat.htm
Potamotrygonids only occur in South American rivers that drain into the Atlantic Ocean or Caribbean Sea. They are are conspicuously absent, however, from the São Francisco basin in northeastern Brazil, rivers that drain into the Atlantic from the Atlantic rainforest of northeastern and southeastern Brazil, the upper Paraná basin, and rivers south of the La Plata river in Argentina.

So I am wondering if this Motoro could be isolated from the other river basins due to the direction in which the water flows.. Could create a number of possibilities, and could be a product of travel during flooding. Could be an isolated number of potamotrygons in that region or country. It's tough to say with the Amazon being as unpredictable as it is.. Not alot of potamotrygons come from that area or are even exported from that area. It's funny they call a ray from Peru a "Guyana" ray sometimes?