Abstract
During monthly sampling of benthic invertebrates at 13 stations in the Maryland Coastal Bays (MCBs) from March to December 2012, a total of 29 individuals of Ianiropsis cf. serricaudis were collected. This species is being reported for the first time in MCBs. A detailed illustration and description of an adult male of I. cf. serricaudis from MCBs is presented. An illustrated key of males of Ianiropsis species belonging to the palpalis-group is also presented. The size of the largest male was 3.0 mm and that of the largest female was 2.5 mm. It is possible that I. cf. serricaudis was present in the MCBs, but overlooked during previous surveys of marine benthic invertebrates in the area because of its small body size and lack of taxonomic expertise.
Highlights
Ianiropsis serricaudis Gurjanova, 1936 is a janirid isopod that was described from the Russian coast of the Sea of Japan (Fig. 1)
Maxillipedal palps with the last three articles elongated are present in males less than 2.2 mm in body length, they are not complete or fully elongated as in adult males to be observed in dorsal view (Gurjanova 1936, Kussakin 1988, and this study, Table 2)
Hobbs et al (2015), Marchini et al (2016), and Ulman et al (2017), suggest that I. serricaudis is well established along both coasts of the United States and the North-eastern Atlantic
Summary
Ianiropsis serricaudis Gurjanova, 1936 is a janirid isopod that was described from the Russian coast of the Sea of Japan (Fig. 1). The original description is poor and the illustrations are incomplete (Gurjanova 1936). Morales-Núñez & Paulinus Chigbu / ZooKeys 747: 115–139 (2018)
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