I think I should qualify this statement... The grammar is certainly correct--ie.,
Ortalida is ορταλιδα, the Greek accusative of ορταλις, which must be turned into a nominative, hence the correct original spelling of the name can only be
Ortalis.
However:
29.3.
Determination of stem in names of type genera. The stem of a family-group name is based on the name of its type genus [Art. 63] and determined as follows.
29.3.1. If a generic name is [..] a Greek [...] word, [...] the stem for the purposes of the Code is found by deleting the case ending of the
appropriate genitive singular.
29.3.1.1. If the stem so formed ends in -id, those letters may be elided before adding the family-group suffixes. [...]
29.3.3. If a generic name is [...] an arbitrary combination of letters, the stem for the purposes of the Code is that adopted by the author who establishes the new family-group taxon, either the entire generic name (see Article 29.6), or the entire generic name with the ending elided, or the entire generic name with one or more appropriate linking letters incorporated in order to form a more euphonious family-group name.
29.4.
Acceptance of originally formed stem. If after 1999 a new family-group name is based on a generic name which is or ends in a Greek or Latin word or ends in a Greek or Latin suffix, but its derivation does not follow the grammatical procedures of Articles 29.3.1 or 29.3.2, its original spelling must be maintained as the correct original spelling, provided
29.4.1. it has a correctly formed suffix [Art. 29.2], and
29.4.2. its stem is formed from the name of the type genus as though it were an arbitrary combination of letters [Art. 29.3.3].
Ortalis is a Greek word, its genitive is
Ortalidos, its stem is Ortalid- under 29.3.1, which may be elided to Ortal- under 29.3.1.1.
29.4 acts as an exception to 29.3, which is the default. Under 29.4, an
originally formed stem would have to be accepted instead of the classical stem, provided that it is formed as though the name were an arbitrary combination of letters (29.3.3). Here, the originally formed stem was Ortalida-. Unfortunately, if this stem is incorrect (ie, not 29.3.3-compliant),
nothing allows to replace it with Ortalis- under 24.9 based on an
a-posteriori interpretation of the author's intent, however convincing this interpretation might be. If Ortalida- is incorrect, 29.4 simply does not protect the originally formed stem, the exception does not apply, and the stem must be formed classically, under 29.3.
(Or, to put it in other words:
- The
only possible way to make a new name "Ortalisini" based on a genus
Ortalis correct, is through Art. 29.4.
- The
only possible thing that Art. 29.4 can achieve is that an "original spelling must be maintained as the correct original spelling".
Thus the original spelling
must have been "Ortalisini", or "Ortalisini"
cannot be correct... The original spelling was Ortalidaini.)
(Additionally, I'm also not sure I understand the effect that the permanent invalidity of the family names formed from
Ortalis Fallen, 1810, can have on this case. Invalidity does not mean unavailability; even if invalid, these names still compete for homonymy, and make any newly-proposed junior homonym as invalid as themselves.)
