1. The number of published studies using geometric morphometrics (GM) for analysing
biological shape has increased steadily since the beginning of the 1990s, covering
multiple research areas such as ecology, evolution, development, taxonomy and palaeontology.
Unfortunately, we have observed that many published studies using GM do not evaluate
the potential allometric effects of size on shape, which normally require consideration
or assessment. This might lead to misinterpretations and flawed conclusions in certain
cases, especially when size effects explain a large part of the shape variation.
