I just wanted to say that these kinds of misspellings or mistaken recollections are very commonly encountered in lists of scientific names of organisms Some of these misspellings arise because the person using the name misunderstands the gender of the genus name thinking as in this case that an a ending always implies a female genus name when sometimes and a ending is found in a neuter name Other mistakes occur because the person writing the name does not understand that the ending ensis means found in the place mentioned in the first part of the species name Best