[Re:] -i or -ii? (ICZN)

Hendrik Segers Hendrik.Segers at RUG.AC.BE
Wed Sep 30 10:01:27 CDT 1998


Colleagues,

Regarding the -i or -ii termination for species-group names formed
from a personal name, much depends on their etymology. I believe the
following applies:  If a name is formed as a noun in the genitive
case after the name of a male person (commonest case), the
termination -i should added to the stem (art. 31 (a)(ii)).  This
results in a single terminal -i if the name is a modern one. If the
name is first latinized (e.g., Tschud to Tschudius), then the
resulting name will have terminal -ii, as a consequence of the rules
of Latin grammar (not recommended nowadays, commonly done in the
18th and 19th century).  It is also admissible (see, however,
recommendation 31A) to form a species name from a personal name as a
noun in apposition, in which case no termination is added (Tschud
gives "Genus tschud", Tschudi gives "Genus tschudi").

For the case proposed by Wolfgang Wuster, the name "tschudii" would
be the correctly formed one, if the name is formed as a noun in the
genitive case. If so, Art. 33(d) would not apply (incorrect
original spelling), and any "tschudi" should be replaced. However, if
the species name is proposed as a noun in apposition, the correct
name is "tchudi". The original publication should be
consulted, and the orthography of the name as originally
proposed should be preserved as much as possible, unless of course
there is clear evidence of an error (e.g., etymology stating that the
name is formed as a noun in the genitive case and based on a personal
name like Tschudi, and printed with single terminal -i).

Thomas Schlemmermeyer's case is a common one in zoological
nomenclature. The orthography of the name as originally proposed
should be retained. If "tschudii" is formed from Mr. Tschud, than it
is assumed that the name was first Latinized. Any subsequent change
(from -i to -ii or vice versa) constitutes an incorrect subsequent
spelling (Art. 33(d)).


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Hendrik Segers
Dept. Biology, University of Gent
K.L. Ledeganckstraat 35
B-9000 Gent
Belgium
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