Replacement names for two nematode junior homonyms.

During taxonomic investigations of nematodes that parasitize millipedes, we reviewed the literature on the nematode genus Robertia Travassos & Kloss, 1961. This literature search also revealed the existence of two other identical genusgroup names for taxa in Chordata and Arthropoda: Robertia Boonstra, 1948 (extinct Permian non-mammalian synapsid) and Robertia Saaristo, 2006 (theridiid spider from the Seychelles), respectively. Of these three homonyms, Robertia Boonstra, 1948 clearly has priority. The spider name Robertia recently was replaced with Seycellesa Kocak & Kemal, 2008. The nematode genus-name also is a junior homonym and requires replacement. We propose the new replacement name Traklosia for Robertia Travassos & Kloss, 1961. In addition to the genus-group names, two family-group names Robertiidae have been proposed, respectively, for the synapsid and nematode genera. The synapsid family name Robertiidae Cluver & King, 1983 is a junior synonym of Pylaecephalidae (van Hoepen, 1934) Kammerer & Angielczyk 2009 (see Sullivan & Reisz 2005, Kammerer & Angielczyk 2009). The nematode family name Robertiidae Travassos & Kloss, 1961 must also be rejected as it is based on a junior homonym genus name and furthermore a junior homonym to the synapsid Robertiidae (ICZN, Article 39); we propose Traklosiidae new replacement name to accommodate Traklosia and related nematode genera.