Neither “ranongensis” nor “ranonganus” are true Latin words, in the real Latin language these adjectives never existed. There are several ways to derive a latinized adjective from the non-Latin word “Ranong”, ranongensis, ranonganus, even ranongalis or ranongosus would be theoretically possible. The author of a new species is at liberty to choose any such form. Subsequently a once published name must be accepted by all others.

In fact, I can find only one species called “ranonganus” (Conus), but very many called ranongensis (Neocallichius, Callinassa, Candida, Paduniella, Dalsiella, Speocera to name only a few…)

Erwin