Pseudopleonexes

Peart, Rachael A., 2006, A revision of Pseudopleonexes Conlan, 1982 (Crustacea: Amphipoda: Ampithoidae) with description of three new species from Australia, Zootaxa 1344, pp. 1-22 : 3

Key to the species of Pseudopleonexes

1 Maxilla 1 palp with one article ( Fig. 13 ) .............. Pseudopleonexes sheardi Just, 2002

- Maxilla 1 palp with two articles ( Fig. 2 )....................................................................... 2

2 Antenna 2 peduncle width similar to antenna 1 peduncle ( Fig. 5 ) ............................... 3

- Antenna 2 robust, peduncle expanded more than antenna 1 peduncle ( Fig. 2 ) ............ 4

3 Gnathopod 2 propodus produced anterodistally to form a setose lobe ( Fig. 7 ) .............. ........................................................................................ Pseudopleonexes justi sp. nov.

- Gnathopod 2 propodus not forming a lobe (figure 10). Pseudopleonexes nexis sp. nov.

4 Antenna 1 subequal in length to antenna 2. Gnathopod 1 carpal lobe present ( Figs. 1 and 3 )......................................................................... Pseudopleonexes burney sp. nov.

- Antenna 1 longer than antenna 2. Gnathopod 1 carpal lobe absent ( Fig. 9 ) .................. ..................................................................... Pseudopleonexes lessoniae ( Hurley, 1954)

Figures

FIGURE 1. Pseudopleonexes burney sp. nov., holotype, male, WAM C 38104, 3 mm. Paratype, female, AM P 62561, 4 mm, Champion Bay, Geraldton, Western Australia, Australia.

FIGURE 2. Pseudopleonexes burney sp. nov., holotype, male, WAM C 38104, 3 mm. Paratype, female, AM P 62561, 4 mm, Champion Bay, Geraldton, Western Australia, Australia. Scales represent 0.5 mm for antennae 1 – 2 and 0.2 mm for mouthparts.

FIGURE 3. Pseudopleonexes burney sp. nov., holotype, male, WAM C 38104, 3 mm. Paratype, female, AM P 62561, 4 mm, Champion Bay, Geraldton, Western Australia, Australia. Scales represent 0.5 mm for pereopods 3 – 7 and 0.2 mm for uropods 1 – 3 and telson.

FIGURE 5. Pseudopleonexes justi sp. nov., holotype, male, AM P 62566, 6 mm. Paratype, female, AM P 62567, 8 mm, Point Lewis, Blanket Bay, Cape Otway, Victoria, Australia.

FIGURE 7. Pseudopleonexes justi sp. nov., holotype, male, AM P 62566, 6 mm. Paratype, female, AM P 62567, 8 mm, Point Lewis, Blanket Bay, Cape Otway, Victoria, Australia. Scales represent 0.5 mm.

FIGURE 9. Pseudopleonexes lessoniae (Hurley, 1954), holotype, male, 9 mm, Island Bay, Wellington, New Zealand. (Modified after Hurley 1954).

FIGURE 13. Pseudopleonexes sheardi Just, 2002, holotype, male, AM P 35088, 3.5 mm. South Australia, Australia. (Modified after Just 2002).