Loimia, Malmgren, 1866

Key to species of Loimia View in CoL from Indo-Pacific reefs

1. Dorsum with rounded tubercles.......................................................................... 2 Dorsum smooth...................................................................................... 5

2. Dorsum with tubercles present from segment 5 onwards...................................................... 3 Dorsum with tubercles restricted to abdominal segments...................................................... 4

3 Short rectangular lateral lobe on segment 4................................... L. pseudotriloba Nogueira et al., 2015 Absence of lateral lobe on segment 4.......................................... L. tuberculata Nogueira et al., 2015

4 Eyespots present; segment 1 with large anteriorly directed lobes, segment 3 with short almost square lobes with rounded corners.................................................................... L. keablei Nogueira et al., 2015 Eyespots absent; lateral lobes on segment 1 poorly developed, compared to those on segment 3… L. verrucosa Caullery, 1944

5. Lateral lobes on segments 1 and 3........................................................................ 6 Lateral lobes on segments 1, 2 and 3...................................................................... 9 Lateral lobes on segments 1, 3 and 4..................................................................... 10

6. Lateral lobes of segment 3 with dorsal flag-like extension..................................................... 7 Lateral lobes of segment 3 without dorsal flag-like extension................................................... 8

7. Segment 1 with large glandular lobes connected mid ventrally by narrow short band, segment 3 with lateral lobes with basal ridge, white glandular patches between notopodia.......................................... L. aimehoensis sp. nov. Segment 1 with large rectangular lateral lobe with thinner curled margins forming a connected strip across ventrum, segment 3 with lateral lobes without dorsal ridge, absence of glandular patches between notopodia..... L. lanai Hutchings et al., 2024

8. Segment 1 with semi-circular lateral lobes connecting mid ventrally by U-shaped glandular ridge, segment 3 with semi-circular lobes directed dorso-laterally with fine convoluted margins connected across ventrum by narrow ridge; uncini with 5 teeth; ventral pads discrete forming U-shaped ventral structure to segment 20..................... L. ochracea ( Grube, 1878) Segment 1 with lobes not connected across mid ventrum, lateral lobes well separated ventrally by deep mid-ventral notch, segment 3 with ear-shaped lateral lobes................................................ L. nigrifilis Caullery, 1944 Segment 1 with large rounded lobes connected mid ventrally by narrow ridge, segment 3 large rectangular lobes inserted more laterally than 1 st ................................................................... L. poraporaensis sp. nov.

9. Segment 1 with lateral lobes which continue across dorsum as a small collar; lobes well developed on segments 2/3, all branchiae similar in size.......................................................... L. ingens ( Grube, 1878) *** Lateral lobes on segments 2/3 extending ventrally to form an anteriorly projecting scoop.................................................................................................... L. batilla Hutchings & Glasby, 1988

10. Lateral lobes of segment 4 well developed................................................................ 11 Lateral lobes of segment 4 with small elongate lobe inserted just below 1 st notopodia, pygidium with elongate papillae............................................................................ L. triloba Hutchings & Glasby, 1988

11. Dorsal margins of lobes on segment 4 reaching level of notopodia, segment 3 with almost circular lobes............................................................................................. L. juani Nogueira et al., 2015 Lateral lobes of segment 4 forming ventral collar...................................... L. bandera Hutchings, 1990