Cosmochthonius cf. semifoveolatus Subías, 1982
Specimens examined: Cerro Otto - under A. chilensis, soil XI-06 (3), III-2006 (1), Leaf litter XI-2006 (10), III-2007 (10), I-2009 (2), LLao LLao - under N. dombeyi, leaf litter XI-2006 (3) and Cerro P. Laguna - under N. antarctica, in leaf litter XI-2006 (2).
Remarks: Cosmochthonius semifoveolatus originally described from Spain. The specimens found share nearly the same morphological traits with C. semifoveolatus originally (Subías 1982) based on the revision of the genus carried out by Ayyildiz and Luxton (1990). First record for Argentina, if the identification is confirmed.