I am not sure whether "tableras" is a typo or just a variant, but these are more commonly called "raíces tablares". The English equivalent is tabular roots.

First some pictures of "raíces tablares":
https://www.google.es/search?num=100&hl=es&q="raíces tablare...

And of tabular roots:
https://www.google.es/search?num=100&hl=es&q="tabular roots"...

They're also known as "buttresses" in English, and I think these pictures illustrate why.

A valuable clue is offered by the one document I've found that mentions "raíces tableras". It's from Venezuela:

"Raíces tableras o aletones se observan en ejemplares de las Leg – Papilonaceae, Bombacaceae, Melieaceae y Combretaceae. Raíces zanco en las Cecropiaceae."
http://www.forest.ula.ve/~herbamer/Resumenes.htm

Well, if we look up Bombacaceae, we find that they have tabular roots:

"On the Distribution of Tabular Roots in Ceiba (Bombacaceae)"
http://www.ncbi.nlm.nih.gov/pubmed/16587577

So, it seems, do Combretaceae:

"Family Combretaceae
This family includes some trees common in coastal areas of the West Indies, like the Conocarpus and Laguncularia "mangroves". Not being true mangroves, they nonetheless are adapted to saline soils. Other species are large trees of humid and rain forests.
The huge tabular roots of Buchevania are a common sight in the montane forests of several islands.
http://www.kingsnake.com/westindian/viridaeplantae5.html

For "buttress roots", see: http://jxb.oxfordjournals.org/content/48/9/1703.full.pdf

--------------------------------------------------
Note added at 25 mins (2013-02-26 02:55:43 GMT)
--------------------------------------------------

Raíces zanco or zancos are stilt roots, characteristic of Cecropiaceae, as my first source says:

"The family Cecropiaceae is characterized by having adventitious roots, and in Cecropia they become stilt-roots, which are a common feature of large trees, especially living near rivers or marshes."
http://en.wikipedia.org/wiki/Cecropia

--------------------------------------------------
Note added at 1 day2 hrs (2013-02-27 04:44:07 GMT) Post-grading
--------------------------------------------------

You're welcome, Mike! Good luck.