in (taxonomic) (Greek & Latin; Taxonomic preposition; synonym: apud; an obsolete preposition, no longer used) – used to be cited with a species name if a primary author of a description included his work as part of a taxonomic treatment published by another author. This preposition must no longer be used in conjunction with the author(s) of a taxon because the in citation (and thus the place where a taxon has been described) is not strictly part of that name. For example, if one author publishes a new species within a treatment written by a another author, only this primary author, the one who wrote the description, must be cited as part of the species name. He is solely responsible for the description. Thus, the author who wrote the rest of the treatment cannot generally claim credit for a description not written by himself, even though that description was included as part of his publication. For taxonomic treatments a reference to the publication can be cited as follows: Lecidea nigerrima Nyl., in Sandst., Abh. naturw. Ver. Bremen 14: 491 (1898). However, if the name Lecidea nigerrima Nyl. is cited by itself, Sandstede must not be included.