Genus Pycnogonum Bruennich, 1764

Remarks: Pycnogonum elephas Stock, 1966 was described from material of uncertain locality due to the mixing of samples collected at one or more RV Calypso 1961 –1962 cruise stations (105, 149, 160, 161, 171 and 173) between Rio de Janeiro (Brazil) and Buenos Aires Province (Argentina), including Uruguayan waters. There have been no further records. The presence of this species in Uruguayan waters is uncertain.