The difference between a primary junior homonym and a subsequent use of a name is undefined, but it is commonly accepted that if the name referred to another species or form, and if there is in addition no evidence the author knew that the name was previously used, it is considered as a junior homonym.
42.
The rule in the International Code of Zoological Nomenclature is that the first such name to be published is the "'senior homonym "'and is to be used ( it is " valid " ); any others are "'junior homonyms "'and must be replaced with new names.
43.
First described as " Chalepoxenus tauricus " by Radchenko ( 1989 ), the species became a secondary junior homonym and given the replacement name " Temnothorax inquilinus " when " Chalepoxenus " was synonymized with " Temnothorax " by Ward " et al . " ( 2015 ).
44.
Ortmann realised that Stimpson's name for the species was a junior homonym in 1897 and renamed the species " Ocypode stimpsonii " . " Ocypode nobilii ", another species from Southeast Asia, was also mistakenly identified as " Ocypode convexa " on its discovery in 1899 by the Italian carcinologist Giuseppe Nobili.
45.
One to five ( or perhaps more ) additional unnamed species are tentatively assigned to the present genus, mainly due to their size and / or forward-angled " teeth " : one smaller and one larger than " O . toliapica " and also from the Late Paleocene or Early Eocene of the Ouled Abdoun Basin in Morocco, one from the mid-Eocene of Uzbekistan, one from Middle Eocene strata of the Tepetate Formation from near El Cien ( Baja California Sur, Mexico ), and one from the Early Eocene of Virginia, USA . As regards the Moroccan fossils, however, the largest of the three " Odontopteryx "-like forms ( initially called " " Odontopteryx " n . sp . 2 " ) has provisionally been termed "'" Odontopteryx gigas " "'but may in fact be a " Dasornis ", while the smallest ( " " Odontopteryx " n . sp . 1 " ) has been considered a distinct genus ( as " Odontoptila inexpectata " ) but that name is both a " nomen nudum " and would in any case be a junior homonym of the geometer moth genus " Odontoptila " and thus unavailable for the bird.
