Despite the existence of two old, but well known, publications that cite Portuguese localities for the Sialidae (McLachlan, 1880; Navás, 1908), all more recent faunal works fail to report this family from Portugal (e.g., Monserrat, 1986; Aspöck et al., 2001; Aspöck & Aspöck, 2011). We have recently reported Sialidae as a new taxon from Portugal (Badano et al., 2011), but Megaloptera turn out to be relatively well known to aquatic biologists in Portugal (Teixeira et al., 2009). Here, a survey of the distribution of Sialidae in continental Portugal is presented within the framework of a collaboration with the Portuguese biodiversity project NaturData (http://naturdata.com/).