Also denominated "of circular or oval plan", these constructions seem to be the nearest, evolutionary and chronologically speaking, to the megalithic sepulchres, of which they would derive; their form at least seems to indicate this, because oval it is usually also the barrow of the Minorcan megaliths in those cases in that this has lasted (as, for example, in "Ses Roques Llises", near the village of "Torre d'en Galmés"). As these, also, they present a clear separation between the corridor and the chamber, a cover with horizontal and plane big flagstones, and, in occasions, a perforated flagstone that gives access to the main chamber.

The door to the exterior of this tomb type generally is formed by monolithic or polilithic jambs with a cyclopean lintel and, in the interior, we can find unbroken benches and a superior floor to which you accede by means of a sort of chimney that is at the end of the corridor.

In what refers to their geographical distribution, all the known exemplars are almost located between the highways from Maó to Alaior, from Maó to Cala en Porter and from Alaior to this creek.

The excavations that have been carried out in some of these monuments seem to give a use of themselves from the Pretalayotic (2000-1400 B.C.) at the end of the Talayotic I (1400-1000 B.C.)