New or Little Known Exotic Invertebrates (Tricladida, Gastropoda, Diplopoda, Symphyla, Isopoda, Arachnida) in Buenos Aires City, Argentina

Abstract

The terrestrial flatworm (Tricladida, Geoplanoidea), slug (Mollusca, Gastropoda) diplopodan (Myriapoda, Diplopoda), symphilan (Myriapoda, Symphylla) and spide (Chelicerata) faunas of Buenos Aires City (CABA, Argentina) are poorly known. The aim of the present contribution is to report new records of exotic species belonging to those clades. Collection and observation of specimens were made without systematic method. The following species are reported: Rhynchodemus sylvaticus (Tricladida, Geoplanidae; first record for Buenos Aires province and second record for tArgentina), Obama nungara (Tricladida, Geoplanidae; CABA), Imbira flavonigra (Tricladida, Geoplanidae; first record for Argentina), Milax gagates (Mollusca, Milacidae; first record for CABA), Cylindroiulus latestriatus (Diplopoda, Julidae; first record
for Argentina), Ophyiulus pilosus (Diplopoda, Julidae; first record for Argentina), Brachydesmus superus (Diplopoda, Paradoxomatidae; first record for CABA and second record for tArgentina), Symphylella vulgaris (Symphyla, Scolopendrellidae; first record for Argentina), Cylisticus convexus (Oniscidea, Cylisticidae; second record for the city by most than 90 years), Uloborus plumipes (Arachnida, Uloboridae; second record for CABA and the country), and Leucauge argyra (Arachnida, Tetragnathidae; first record for Buenos Aires province and second record for Argentina). Several authors have indicated that the number of exotic invertebrates in European cities has been dramatically increased in the last years. This pattern should be extrapolated to rgentina. Unfortunately, up to the date we entirely lack information about dispersal and distribution of exotic invertebrates in the city. It is necessary to prioritize the study of exotic species, especially those that are potentially problematic for native environments.