Dactylopleustes Karaman & Barnard, 1979

Labay, Vjacheslav S., 2025, Review of amphipods of the family Pleustidae Buchholz, 1874 (Amphipoda) from the coastal waters of Sakhalin Island and Kamchatka Peninsula (Far East of Russia). IV. Subfamily Dactylopleustinae Bousfield and Hendrycks, 1994, Zootaxa 5627 (2), pp. 201-253 : 249-250

publication ID	https://doi.org/10.11646/zootaxa.5627.2.1
publication LSID	lsid:zoobank.org:pub:05D493F1-D9C2-40C4-9377-6103BD4BF502
persistent identifier	https://treatment.plazi.org/id/03CB87F1-FF85-FF88-31FD-E4C2FA47FD2C
treatment provided by	Plazi
scientific name	Dactylopleustes Karaman & Barnard, 1979
status

Treatment

Key to species of genus Dactylopleustes Karaman & Barnard, 1979 View in CoL

1. Antenna 2, flagellum with 8 or more articles ( Fig. 2j, k, l View FIGURE 2 )..................................................... 2

- Antenna 2, flagellum with 5 or fewer articles ( Fig. 2m –r View FIGURE 2 )...................................................... 4

2. Antenna 1, flagellum with 11–12 or fewer articles ( Fig. 2b, c View FIGURE 2 ); maxilliped, outer plate with 1–2 heavy apical setae ( Fig. 4k, l View FIGURE 4 ) ................................................................................................... 3

- Antenna 1, flagellum with 17–18 articles ( Fig. 2a View FIGURE 2 ); maxilliped, outer plate with 3 heavy apical setae ( Fig. 4j View FIGURE 4 )............................................................................................ D. longoantennis sp. nov.

3. Antenna 1, flagellum with 11–12 articles ( Fig. 2b View FIGURE 2 ); maxilliped, outer plate with 2 heavy apical setae ( Fig. 4k View FIGURE 4 )............................................................................................... D. tzvetkovae sp. nov.

- Antenna 1, flagellum with 8 articles ( Fig. 2c View FIGURE 2 ); maxilliped, outer plate with heavy apical seta ( Fig. 4l View FIGURE 4 ).......................................................................... D. yoshimurai Tomikawa, Hendrycks & Mawatari, 2004 View in CoL

4. Mandible, palp article 3 longer than articles 1 and 2 together ( Fig. 3k View FIGURE 3 ); pereopod 2 (gnathopod 2), posterior margin of propodus with 2 groups of long setae ( Fig. 5r View FIGURE 5 ).............................................. D. obsolescens Hirayama, 1988 View in CoL

- Mandible, palp article 3 shorter than articles 1 and 2 together ( Fig. 3f–j View FIGURE 3 ); pereopod 2 (gnathopod 2), posterior margin of propodus with 3 groups of long setae ( Fig. 5m –q View FIGURE 5 )............................................................ 5

5. Pereopods 2 (gnathopod 2), 3 and 4, basis strongly setose anteriorly ( Fig. 6h View FIGURE 6 )........................................................................................................ D. echinoides Bousfield & Hendrycks, 1995

- Pereopods 2 (gnathopod 2), 3 and 4, basis with or without setae sparsely scattered along anterior margin ( Fig. 6g, i, k, m View FIGURE 6 ).. 6

6. Pereopod 1 (gnathopod 1), posterior margin of propodus with 2 groups of long setae ( Fig. 5g, h View FIGURE 5 )...................... 7

- Pereopod 1 (gnathopod 1), posterior margin of propodus with 3–4 groups of long setae ( Fig. 5d, f View FIGURE 5 ).................... 8

7. Maxilliped, outer plate with 2 heavy and 1 small apical setae ( Fig. 4q View FIGURE 4 ); palp article 3 long and narrow ( Fig. 20d, e View FIGURE 20 )........................................................................................... D. okhotensis sp. nov.

- Maxilliped, outer plate with 1 heavy and 1 small apical setae ( Fig. 4p View FIGURE 4 ); palp article 3 short and wide ( Fig. 26a, g View FIGURE 26 )............................................................................................... D. ornatus sp. nov.

8. Antenna 1, flagellum with 6 or fewer articles ( Fig. 2f View FIGURE 2 ); mandible, palp article 3 as long as article 2 ( Fig. 3h View FIGURE 3 ).............................................................................................. D. awatschensis sp. nov.

- Antenna 1, flagellum with 8 articles ( Fig. 2d View FIGURE 2 ); mandible, palp article 3 2 times as long as article 2 ( Fig. 3f View FIGURE 3 )......................................................................................... D. echinoicus ( Tzvetkova, 1975) View in CoL