You might ask now who the parents are and what the exact name of their
species might be. Here is the borderline to professional science. We should be
aware that an exact water bear species determination normally is beyond the scope
of us amateurs. Nevertheless we will discuss some general ideas of
species determination here .
The egg on the photograph above is being shown in some of the more modern
water bear monographs, e.g. those by Walter Maucci and Ian M. Kinchin (see
literature). "Our" egg has an identical shape and an identical surface.
Polygon areole rows are grouped around the tips (chorions) and there is a
characteristical pair grouping of those polygons. Maucci mentions
an overall diameter of 80 to 100 µm which fits our egg, too.
Also the vertical lining of the protrusions can be found in Maucci's drawing.
Maucci and Kinchin state that this type of egg is an egg by
Macrobiotus areolatus .
Perhaps we should better stay modest and state that there is a certain probability
that our egg is an Macrobiotus areolatus egg.
The grown-up animals close to the egg looked as shown in the photomicrograph
below. Possibly those were the parents ... but you never know when the
egg is just lying there.