Unexplained distribution anomalies – case studies

According to Eberhart’s classification, class one cryptids are distribution anomalies of known species, e.g., known animals (or plants), reported outside their normal range. Although often associated with potentially dangerous animals such as crocodiles and other large predators, such cryptids appeared to be common both in historical and contemporary times. They encompass all taxa. The present article is an overview of several known class 1 cryptids, which are, to this moment, completely unexplained, e.g., no introduction was reported.