Key to the known adult females of the genus Julmarichardia, modified from Ritger & Heard (2007)

1. Antenna with article-2 lacking distinct marginal spines or tubercles (Fig. 20A)........................................................................................... Richardjulmaia bajau Bamber & Sheader, 2005 gen. nov.

- Antenna with article-2 with distinct marginal spines or tubercles (Fig. 20B–G)...................... Julmarichardia … 2

2. Rostrum with margins entire, smooth (Fig. 20H)............................................ Julmarichardia sp. A

- Rostrum with margin weakly or strongly dentate (Fig. 20I–M)................................................. 3

3. Rostrum triangular ending in an acute tip (Fig. 20I–J)........................................................ 4

- Rostrum sub-triangular or spatulate ending in rounded tip (Fig. 20K–M)......................................... 5

4. Rostrum strongly denticulate laterally, having 12–14 acute marginal teeth (Fig. 20I)................ J. alinati Guţu, 1989

- Rostrum not strongly denticulate laterally, having 6–7 regular marginal teeth on mid-margin (Fig. 20J)............................................................................................... J. deltoides (Barnard, 1914)

5. Rostrum sub-triangular ending in rounded tip (Fig. 20K)................................... J. thomassini Guţu, 1989

- Rostrum spatulate (Fig. 20L–M)......................................................................... 6

6. Rostrum with 8–20 long marginal plumose setae (Fig. 20L). Pereopod-1 with subacute coxal process armed with 5–6 translucent acute or subacute apophyses and 4–5 plumose setae (Fig. 20N)......................... J. gutui Ritger & Heard, 2007

- Rostrum lacking long marginal plumose setae (Fig. 20M). Pereopod-1 with acute coxal process armed with 4–5 denticles and 3–4 plumose setae (Fig. 20O)............................................................ J. magdae sp. nov.