Rhicnosthetus, Hoffman, 2006

Bouzan, Rodrigo Salvador, Iniesta, Luiz Felipe Moretti & Brescovit, Antonio Domingos, 2021, Periclimenaeus djiboutensis Bruce 1970, Zoological Studies 60 (21), pp. 1-14 : 3

Key to males of Rhicnosthetus

1. Prefemoral process reaching only half the size of the acropodite ( Fig. 3a, c ) .......................................... R. rondoni Hoffman, 2006

1’. Prefemoral process exceeding half the size of the acropodite ( Fig. 4a ) ............................................................................................... 2

2. Solenomere and acropodital process divided at the base of the acropodital region ( Fig. 9e ) .................. R. penabarbosai sp. nov.

2’. Solenomere and acropodital process not divided at the base of the acropodital region, divided apically ( Fig. 7a, c ) ........................ 3

3. Acropodital process longer than the solenomere ( Fig. 7a–d ) ........ ......................................................................... R. chagasi sp. nov.

3’. Acropodital process about same length as the solenomere ( Fig. 4a–d ) ............................................. R. coriaceus ( Schubart, 1947)

Figures

Fig. 3. Rhicnosthetus rondoni (CZUFMT MYR 864), left gonopod. (a) mesal view; (b) detail of the acropodite and prefemoral process, mesal view; (c) ectal view; (d) detail of the acropodite and prefemoral process, ectal view. Scale bars: a, c–d = 500 µm; b = 400 µm. Abbreviations: AP, acropodital process; PfP, prefemoral process; S, solenomere; SG, seminal groove; SP, spiniform process.

Fig. 4. Rhicnosthetus coriaceus (MNRJ 11625), left gonopod. (a) mesal view; (b) detail of the acropodite and prefemoral process, mesal view; (c) ectal view; (d) detail of the acropodite and prefemoral process, ectal view. Scale bars: a–c = 500 µm; d = 400 µm. Abbreviations: AP, acropodital process; PfP, prefemoral process; S, solenomere; SG, seminal groove; SP, spiniform process.

Fig. 9. Rhicnosthetus penabarbosai sp. nov. (holotype, IBSP 7784), dorsal views of anterior (a), midbody (b) and posterior (c) body rings. Scale bars = 2 mm. Left gonopod. (d), mesal view; (e), ventral view; (f), ectal view. Scale bars: 1 mm. Abbreviations: AP, acropodital process; PfP, prefemoral process; SG, seminal groove; SP, spiniform process.

Fig. 7. Rhicnosthetus chagasi sp. nov. (CZUFMT MYR 851), left gonopod. (a) mesal view; (b) detail of the acropodite, mesal view; (c) ectal view; (d) detail of the acropodite and prefemoral process, ectal view. Scale bars: a–c = 500 µm; d = 400 µm. Abbreviations: AP, acropodital process; PfP, prefemoral process; S, solenomere; SG, seminal groove; SP, spiniform process.