Panel (10a, 10b) for a paneling, in particular floor panel for a floor covering, comprising: a panel upper surface and a panel lower surface extending parallel thereto, which are mutually spaced from each other by a total thickness; an upper coupling element and a lower coupling element, wherein two panels (10a, 10b) of this type can be coupled to each other by means of a downward movement of the upper coupling element of the first panel with respect to the lower coupling element of the second panel, wherein the upper coupling element has at its distal end a wedge-shaped protrusion and the lower coupling element has a mating surface, which, in the coupled state of two panels (10a, 10b), form a first locking system, the upper coupling element has a latching element adjoining the wedge-shaped protrusion and the lower coupling element has a detent receptacle adjoining the mating surface which, in the coupled state of two panels (10a, 10b), form a second locking system, the upper coupling element has a locking receptacle adjoining the latching element, and the lower coupling element has at its distal end a locking element adjoining the detent receptacle, which, in the coupled state of two panels (10a, 10b), form a third locking system wherein a material thickness of the lower coupling element between the panel lower surface and the detent receptacle is less than 100 percent of a material thickness of the upper coupling element between the panel upper surface and the latching receptacle, characterised in that a locking element surface of the locking element facing the locking receptacle has a substantially uniform arcuate shape and/or in that a locking receptacle surface of the locking receptacle facing the locking element has a substantially uniform arcuate shape, the locking element surface and the locking receptacle surface being designed in particular to be substantially contiguous with one another, and a tangent to the centre of the arcuate shape of the locking element surface and/or a tangent to the centre of the arcuate shape of the locking receiver surface encloses or enclose a respective arc angle (alpha) with respect to the panel surface and the panel underside, wherein the respective arc angle (alpha) is less than or equal to 45 degrees, preferably less than or equal to 35 degrees, particularly preferably less than or equal to 25 degrees, and the counter surface forms a respective counter surface angle (beta) with the panel surface and the panel underside, wherein the respective counter surface angle (beta) is less than or equal to 45 degrees, preferably smaller including 35 degrees, particularly preferably smaller including 25 degrees, wherein the arc angle (alpha) and the counter-surface angle (beta) differ from one another by less than 20 degrees, preferably less than 15 degrees, particularly preferably less than 10 degrees. a panel upper surface and a panel lower surface extending parallel thereto, which are mutually spaced from each other by a total thickness; an upper coupling element and a lower coupling element, wherein two panels (10a, 10b) of this type can be coupled to each other by means of a downward movement of the upper coupling element of the first panel with respect to the lower coupling element of the second panel, wherein the upper coupling element has at its distal end a wedge-shaped protrusion and the lower coupling element has a mating surface, which, in the coupled state of two panels (10a, 10b), form a first locking system, the upper coupling element has a latching element adjoining the wedge-shaped protrusion and the lower coupling element has a detent receptacle adjoining the mating surface which, in the coupled state of two panels (10a, 10b), form a second locking system, the upper coupling element has a locking receptacle adjoining the latching element, and the lower coupling element has at its distal end a locking element adjoining the detent receptacle, which, in the coupled state of two panels (10a, 10b), form a third locking system wherein a material thickness of the lower coupling element between the panel lower surface and the detent receptacle is less than 100 percent of a material thickness of the upper coupling element between the panel upper surface and the latching receptacle, characterised in that a locking element surface of the locking element facing the locking receptacle has a substantially uniform arcuate shape and/or in that a locking receptacle surface of the locking receptacle facing the locking element has a substantially uniform arcuate shape, the locking element surface and the locking receptacle surface being designed in particular to be substantially contiguous with one another, and a tangent to the centre of the arcuate shape of the locking element surface and/or a tangent to the centre of the arcuate shape of the locking receiver surface encloses or enclose a respective arc angle (alpha) with respect to the panel surface and the panel underside, wherein the respective arc angle (alpha) is less than or equal to 45 degrees, preferably less than or equal to 35 degrees, particularly preferably less than or equal to 25 degrees, and the counter surface forms a respective counter surface angle (beta) with the panel surface and the panel underside, wherein the respective counter surface angle (beta) is less than or equal to 45 degrees, preferably smaller including 35 degrees, particularly preferably smaller including 25 degrees, wherein the arc angle (alpha) and the counter-surface angle (beta) differ from one another by less than 20 degrees, preferably less than 15 degrees, particularly preferably less than 10 degrees.