The ornamental design for a detachabledinosaurtoy, as shown and described.
FIG. 1 is a perspective view of a detachable dinosaur toy showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a top plan view thereof.
The broken lines and areas within the broken lines in the drawings depict portions of the detachable dinosaur toy that form no part of the claimed design.