Laonice

Greaves, Elizabeth & Wilson, Robin, 2011, New Laonice species (Polychaeta: Spionidae) from western and northern Australia, Zootaxa 2903, pp. 1-20 : 17

Key to Australian Laonice species

1. Neuropodial hooded hooks with 1 large main tooth and 1–4 accessory teeth...................................... 2

- Neuropodial hooded hooks with no obvious main tooth and many (5+) accessory teeth ( Fig 9 A–B).... L. pectinata sp. nov.

2(1). Interparapodial pouches begin from chaetiger 1–3............................................................ 3

- Interparapodial pouches begin from chaetiger 6 or later....................................................... 4

3(2). Nuchal organ extends to about chaetiger 50.................................................. L. hermaphroditica

- Nuchal organ extends to chaetiger 7.............................................................. L. bassensis

4(2). Dorsal crests present.................................................................................. 5

- Dorsal crests absent................................................................................... 6

5(4). Anterior chaetiger have 5 rows of capillary chaetae......................... L. weddellia / L. cf. weddellia (see main text)

- Anterior chaetigers have 2 rows of capillary chaetae.................................... Laonice lemniscata sp. nov.

6(4). Occipital antenna absent; nuchal organ absent, prostomium fused with dorsum ( Figs. 5 A, 6A), pair of ridges arising posterior- laterally from the prostomium ( Fig. 6 A), notopodial hooded hooks present from chaetiger 20–40; interparapodial pouches ter- minate chaetiger 10–18, some anterior pouches with additional dorsal flap ( Fig. 6 E)................... L. insolita sp. nov.

- Occipital antenna present; notopodial hooded hooks absent; interparapodial pouches terminate about chaetiger 50, prostomium and peristomium fused anteriorly............................... L. quadridentata / L. cf. quadridentata (see main text)

Figures

FIGURE 5. Laonice insolita sp. nov. (MV F 110725 except where noted). A. Anterior end, dorsal view. B. Chaetigers 21 – 24, dorsal view. C. Pygidium (MV F 110606), dorsal view. D. Juvenile pygidium (MV F 110741), dorsal view. E. Parapodium 5 (right). F. Parapodium 34 (right), branchia lost. Scales: A – B 0.5 mm; C – D 0.1 mm; E – F 0.05 mm.

FIGURE 6. Laonice insolita sp. nov. (ZMH-P 25871). A. Anterior end, dorsal view. B. Anterior end, lateral view. C. Chaetiger 6 – 10 from dorsal, arrow indicating row of tiny holes present near the notopodial base. D. Left side of chaetiger 6 and 7 from dorsal. E. Interparapodial pouch between chaetigers 8 – 9, arrow indicating additional flap from above. F. Chaetigers 16 – 18 with interparapodial pouches. G. Neuropodial hook from chaetiger 37, hood removed. Scales: A – C, E, F 100 µm; D 20 µm; G 1 µm.

FIGURE 9. Laonice pectinata sp. nov. (MV F 150655). A, B. Neuropodial hooded hooks, chaetiger 23. Scales: A – B 0.01 mm.