Callogobius nigromarginatus, a new species of goby (Pisces: Gobiidae) from Taiwan

Callogobius nigromarginatus, was collected from muddy-sand bottom close to a reef flat in Taitung County, southeastern Taiwan. This species has 25–26 lateral scale rows, thus belonging to the group with fewer scale rows as proposed by Goren et al. (1991). Diagnostic characters of this species include: fewer predorsal scales (5), 7–8 transverse scale rows, with posterior oculoscapular pores, three preopercular pores, pelvic fraenum present, and distinctive color pattern (broad stripe on 2nd dorsal and anal fin in adult). A key to all eight species of this low-scale-row group is also presented.