A new species of Leipsuropus Stebbing, 1899 (Amphipoda: Podoceridae) from Japan Author Matsumoto, Yu Graduate School of Science, Hokkaido University. Sapporo 060 - 0810, Japan Author Kajihara, Hiroshi Faculty of Science, Hokkaido University. Sapporo 060 - 0810, Japan E-mail: kakui @ eis. hokudai. ac. jp & DA Author Kakui, Keiichi Faculty of Science, Hokkaido University. Sapporo 060 - 0810, Japan E-mail: kakui @ eis. hokudai. ac. jp & DA text Nauplius 2023 e 2023005 2023-02-20 31 1 8 http://dx.doi.org/10.1590/2358-2936e2023005 journal article 292468 10.1590/2358-2936e2023005 4dc44a1f-8c50-487c-84c4-82524b43474d 2358-2936 10716750 D4641240-C79E-471D-8F7C-8A2DA4AA04A8

Table 1. Comparison of selected characters between males in Leipsuropus.

Characters	L. seisuiae sp. nov.	L. astericolus	L. hongi	L. parasiticus	L. sinensis
No.of projections on tergal plate of pereonites 2–5	5 each	3 each	5 each	Absent	1 each
Shape of dorsal projection	Narrow spiniform	Broad keel-like	Broad keel-like	–	Broad keel-like
Pereonites 6 and 7	Segmented	Segmented	Segmented	Fused	Segmented
Dorsal tubercle on telson	Present	Absent	Absent	Absent	Present
Projections on palm of gnathopod 2	1 small, proximal, denticulate	1 wide and 2 large triangular	1 wide and 2 large triangular	1 large triangular and 1 digitiform	Absent
Source	This study	Ariyama (2012)	Ariyama (2012)	Barnard and Drummond (1981)	Ren (2012)