Key to the larvae of Labrundinia

The larvae of Labrundinia amazonica sp. n., L. costaricae sp. n., L. fera, L. fosteri, L. hirsuta, L. kogilamae sp. n., L. meta, L. nathani sp. n., L. nicaraguensis sp. n., L. opela, L. parabecki, L. panamensis sp. n., L. setosa sp. n. and L. trilucida sp. n. remain unknown.

1. Surface of head capsule covered with small spines or nodules (Fig. 33A)......................................... 2

- Surface of head capsule smooth (Fig. 29A)............................................................... 15

2. Head with one or more lateroventral spine (Figs 69A; 33A)................................................... 3

- Head without any lateroventral spine group (Fig. 81A)....................................................... 7

3. Lateroventral spine group consisting of only a single, enlarged spur (Fig. 69A)............... Labrundinia robacki sp. n.

- Lateroventral spine group consisting of several small spines (Fig. 33A).......................................... 4

4. Subbasal setae of posterior parapods serrated basally (Fig. 33H); bifid claw with U-shaped lower indentation (Fig. 33I)....................................................................................... Labrundinia longipalpis

- Subbasal setae of posterior parapods simple (Fig. 51H); bifid claw with V-shaped lower indentation (Fig. 51I)........... 5

5. Head with dark brown posteroventral spot (Fig. 51A)................................ Labrundinia parafittkaui sp. n.

- Head without any posteroventral maculation (Fig. 22A)...................................................... 6

6. Head slender almost rectangular; IC 0.51 (Fig. 22A)...................................... Labrundinia gregi sp. n.

- Head not as above, broader; IC 0.57–0.60 (Fig. 18A).................................... Labrundinia fittkaui sp. n.

7. Claw of posterior parapods with serrated inner margin (Fig. 81H).............................................. 8

- Claw of posterior parapods with smooth inner margin...................................................... 11

8. Bifid claws of posterior parapods with U-shaped lower indentation (Fig. 81J)..................... Labrundinia tenata

- Bifid claws of posterior parapods with V-shaped lower indentation (Fig. 40J)..................................... 9

9. Subbasal setae of posterior parapods serrated basally (Fig. 40I)........................ Labrundinia multidentata sp. n.

– Subbasal setae of posterior parapods simple (Figs 54I, 66I).................................................. 10

10. Head with posteroventral spine group (Fig. 54A)................................. Labrundinia parareniformis sp. n.

- Head without posteroventral spine group (Fig. 66A)................................... Labrundinia reniformis sp. n.

11. Head with ventral maculation (Fig.71B)................................................................. 12

- Head without ventral maculation (Fig. 63A).............................................................. 13

12. Ventral maculation on head semicircular (Fig. 71B); bifid claws of posterior parapod with U-shaped lower indentation................................................................................. Labrundinia semicurvata sp. n.

- Ventral maculation on head variable in shape (Fig. 15A); bifid claw of posterior parapods with V-shaped lower indentation

(Fig. 15I)...................................................................... Labrundinia fiorelinii sp. n. 13. Ratio between inner tooth length and outer tooth length on bifid claw (B/C) 1.09–1.22; posterior margin may be darkened (Fig. 63)................................................................................ Labrundiniapilosella

- Ratio between inner tooth length and outer tooth length on bifid claw (B/C) 0.89–0.97............................. 14

14. Head entirely yellow, without any maculation (Fig. 74A).................................... Labrundinia separata

- Head dark along postoccipital margin (Fig. 78A)........................................ Labrundinia sofiae sp. n.

15. Head with lateroventral spine group (Figs 29A; 60A)....................................................... 16

- Head without lateroventral spine group.................................................................. 23

16. Head with lateroventral spine group consisting of only a single, enlarged spur (Fig. 60A)........ Labrundinia paulae sp. n.

- Head with lateroventral spine group consisting of several small spines (Fig. 29A)................................. 17

17. Mandible with accessory tooth smaller than basal tooth (Fig. 29E)............................................ 18

- Mandible with accessory tooth subequal to basal tooth (Fig. 88E)............................................. 21

18. Ventral maculation on head distinct (Fig. 29A)........................................... Labrundinia johannseni

- Ventral maculation on head indistinct.................................................................... 19

19. Posterior parapod with simple subbasal seta (Fig. 7H); bifid claw with V-shaped lower indentation (Fig. 7I).................................................................................................... Labrundinia becki

- Posterior parapod with basally serrated subbasal setae (Fig. 44H); bifid claw with U-shaped lower indentation (Fig. 44I).. 20

20. Inner tooth of ligula almost the same size outer tooth (Fig. 33F); pecten hypopharyngis with 9 teeth (Fig. 33G)............................................................................................. Labrundinia longipalpis

- Inner tooth of ligula smaller than outer tooth (Fig. 44F); pecten hypopharyngis with 7 teeth (Fig. 44G)................................................................................................... Labrundinia neopilosella

21. Head with lateroventral spine group consisting of large spines (Fig. 88A)....................... Labrundinia virescens

- Head with lateroventral spine group consisting of minute spines (Fig. 26A)..................................... 22

22. Ligula 54–61 Μm long (Fig. 26F)..................................................... Labrundinia jasoni sp. n.

- Ligula 88–89 Μm long (Fig. 57F)............................................... Labrundinia paravirescens sp. n.

23. Head with posteroventral spine group (Fig. 10A); paraligula bifid (Fig. 10F); subbasal setae of posterior parapods simple (Fig. 10H).............................................................................................. 24

- Head without posteroventral spine group (Fig. 3A); paraligula multi-toothed (Fig. 3F); subbasal setae on posterior parapods serrated basally (Fig. 3H)............................................................................. 25

24. AR 2.80–2.93; ligula broad (Fig. 10F)................................................ Labrundinia carolae sp. n.

- AR 3.02–3.22; ligula narrow (Fig. 36F)............................................... Labrundinia mayaca sp. n.

25. Head yellow with small, dark brown ventral spots (Fig. 3A)............................ Labrundinia amandae sp. n.

- Head yellow without any spots (Fig. 85A)........................................... Labrundinia unicolor sp. n.