Correction to: A comprehensive comparison of sex-inducing activity in asexual worms of the planarian Dugesia ryukyuensis: the crucial sex-inducing substance appears to be present in yolk glands in Tricladida.

[This corrects the article DOI: 10.1186/s40851-018-0096-9.].

Correction

Following publication of the original article [1] the author advised that unfortunately in the ‘Discussion’ section the letters ‘L’ and ‘D’ in some ‘enantiomer’ expressions were not written in the format of ‘small capitals’. Rather, they were written as lower-case letters.

This formatting is an important nomenclature in chemistry, the author confirmed, advising:

“Enantiomers (mirror-image isomer) of amino acids (L or D) is always expressed by ‘small capitals’ ”

As such, the original article [1] has been corrected to reflect this.