Leipsuropus, Stebbing, 1899

Matsumoto, Yu, Kajihara, Hiroshi & Kakui, Keiichi, 2023, A new species of Leipsuropus Stebbing, 1899 (Amphipoda: Podoceridae) from Japan, Nauplius (e 2023005) 31, pp. 1-8 : 6

Key to males of the species of Leipsuropus

1. Dorsal projections on body absent ........................................................................ L. parasiticus ( Haswell, 1879)

1'. Dorsal projections on body present .......................................................................................................................... 2

2. Tergal plate of pereonites 2–5 with 1 projection ................................................................ L. sinensis Ren, 2012

2'. Tergal plate of pereonites 2–5 with 3 or 5 projections ......................................................................................... 3

3. Tergal plate of pereonites 2–5 with 3 projections ................................................. L. astericolus Ariyama, 2012

3'. Tergal plate of pereonites 2–5 with 5 projections ................................................................................................. 4

4. Dorsal projections on body broad and keel-like; gnathopod-2 palmar margin with one wide and two large triangular projections ............................................................................................................... L. hongi Ariyama, 2012

4'. Dorsal projections on body narrow and spiniform; gnathopod-2 palmar margin with small, proximal, denticulate projection ......................................................................................................................... L. seisuiae sp. nov.