why are so many rays without scientific names?

  • We are currently upgrading MFK. thanks! -neo
bcfd144;4437295; said:
From the research I found, the Pearl Stingray's scientific name is Dasyatis margaritella. that at least what I found on this link

http://en.wikipedia.org/wiki/Pearl_stingray
Click to expand...
Cmon man, read the info first. These pearls come from saltwater, not the freshwater ones we're talking about. Even before that, theres no possible way the freshwater pearls are called Dasyatis margaritella since we already know them as Potamotrygons.

vitaly;4437365; said:
no, i think itaituba is where the ray is collected. Pearl rays dont have official scientific names either. dont look for it.
Click to expand...
Yeaa, I just remembered that now :screwy:
 
I didnt really read it, I looked it up real fast and then had to run out.. posted before I really had time to read it. but I will.............



Looks like from some I have read real fast, these rays have been found in salt, but also in freshwater areas...
so who knows. Just reading and saying what I have read.

http://nersp.nerdc.ufl.edu/~pmpie/dsabina.html
 
well the last guy said they are saltwater. I was simply posting a link I found that says they are found in both frash and salt...

http://nersp.nerdc.ufl.edu/~pmpie/dsabina.html

But then again, Im only going by what Im reading on the net, Im not an expert. Dont pretend to be. It was asked what the scientific name was for a Pearl. When you type in Pearl Stingray scientific name, it comes up with Dasyatis margaritella. Link for that is http://en.wikipedia.org/wiki/Pearl_stingray
after posting that, I was told it was that was a saltwater ray. That they were talking about a freshwater... Not that I didnt already know they were talking about a freshwater... but then if you type in dasyatis margaritella fresh or salt water, this link comes up http://nersp.nerdc.ufl.edu/~pmpie/dsabina.html
which says, these rays are found in saltwater and sometimes freshwater..
then this link also say the same thing.... http://www.absoluteastronomy.com/topics/Atlantic_stingray

in that link it says: A 2001 phylogenetic analysis by Lisa Rosenberger, based on morphology
Morphology (biology)
In biology "morphology" is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features....

, found that the Atlantic stingray is one of the more basal members of its genus. It is the outgroup to a large clade
Clade
A clade is a group consisting of an organism and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central...

that contains, amongst others, the southern stingray
Southern stingray
southern_stingray.gif

The southern stingray, Dasyatis americana, is a stingray of the family Dasyatidae found in tropical and subtropical waters of the southern Atlantic Ocean, Caribbean Sea, and Gulf of Mexico. It has a flat, diamond-shaped body, with a mud brown upper-body and white underbelly...

(D. americana), the roughtail stingray
Roughtail stingray

The roughtail stingray is a species of stingray in the family Dasyatidae, with separate populations in coastal waters of the northwestern, eastern, and southwestern Atlantic Ocean. This bottom-dwelling species typically inhabits sandy or muddy areas with patches of invertebrate cover, at a depth of...

(D. centroura), the longnose stingray
Longnose stingray
The longnose stingray, Dasyatis guttata, is a species of stingray in the family Dasyatidae, native to the western Atlantic Ocean from the southern Gulf of Mexico to Brazil. Found in coastal waters no deeper than , this demersal species favors muddy or sandy habitats...

(D. guttata), and the pearl stingray
Pearl stingray
The pearl stingray, Dasyatis margaritella, is a little-known species of stingray in the family Dasyatidae, found in shallow coastal waters from Mauritania to Angola. Growing to across, this species has a rounded pectoral fin disc with a pointed snout, and a wide band of dermal denticles over the... (D. margaritella).


But who knows... Im no expert. Maybe there isnt a scientific name for the Pearl.



GSHOCH
Correct me if Im wrong also, I thought Potamotrygons were more know as :
common name for those are Reticulated River Ray, Teacup Ray, Colombian Ray
I didnt see Pearl on that list I found.....


Like I said, Im new at studing this stuff, so If I dont ask or research this or find out some reasearch is wrong, Ill never know...
 
Like I said, you need to read. I said there are TWO kinds of pearls. This saltwater kind you mentioned, and the freshwater kind we are talking about right now. Two completely different species. Potamotrygon is not a general name for a specific species, its a genus containing all the freshwater river stingrays in south america. It's not just limited to things like teacup rays which dont even exist. Theres a more accurate list of potamotrygons, both with and without species names from Miles (http://stingraysource.com/StingraySource/dreamline/pnumbers.htm). Once again, the pearls we are talking about are from Brazil if I remember correctly, but for sure are from south america and are pure freshwater. The ones you found just have a common name which coincidently happens to be pearl stingray, but they come from North Africa which is nowhere near South America. After that, I dont even know how you dragged D.Sabina into this lol. D.Sabina have nothing to do with pearls at all, neither do they have a common name of pearl stingray. Yes they are found in fresh and saltwater, but they are still naturally saltwater and are by no means potamotrygons.
 
well you dont know till you ask. And all I know is I put in Pearl Stingray Scientific name and thats what came up.
everyone has to learn somewere.....
 
This document contains a actual table with the scientific names of south american freshwater stingrays and where the species live.
At the end of the table you can see three undescribed species, Potamotrygon sp.
"cururu" is the histrix, "itaituba" is P14 and "pearl" is, you guess it pearl.
www.cites.org/common/com/AC/24/EFS24-14-02.pdf

The term sp. is not identical with the SP used for hybrid stingrays in Asia.
http://en.wikipedia.org/wiki/Undescribed_taxon

The descrittion of a new species is not easy, especially in freshwater stingrays. See the description of P. boesemani for example. In 1985 Rosa wrote that these may be a new species and called them Potamotrygon sp. B. It lasted until 2008 for the description of this species:
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000100001
 
You must log in or register to reply here.
MonsterFishKeepers.com
Top Bottom