Neanthes gisserana

Neanthes cf. gisserana (Horst, 1924) Fig. 6 A – C Nereis (Lycoris) gisserana Horst, 1924: 151–152, pl. 30, figs 6, 7. Nereis gisserana. – Monro 1939, fig. 302 a – f. Neanthes sp. cf. N. gisserana. – Pamungkas and Glasby 2015: 11 –12, fig. 4 C, D. Material examined. MZB.Pol.00312 (106 males) and MZB.Pol.00313 (59 females), collected as heteronereids locally known as ‘ nyale ’ by Dewi C. Murniati on 8 March 2018 from Lombok Island: Seger Beach, Kuta Village, Pujut District, Central Lombok Regency, West Nusa Tenggara Province (8°54'25.9"S, 116°17'49.3"E). SMF 33464 (5 males) and SMF 33465 (4 females), collection details as for MZB Pol.00312 and MZB Pol.00313, respectively. Comparative material. Neanthes sp. cf. N. gisserana as heteronereids locally known as ‘ laor / wawo ’. MZB.Pol.00167 (2 males), MZB.Pol.00168 (2 females), RCLA.Ann.031 (5 males), RCLA.Ann.032 (3 females), RCLA.Ann.033 (1 male) and RCLA.Ann.034 (1 female), collected by Robert Alik on 18–19 March 2014 from Ambon Island: Suli Village, Salahutu District, Central Maluku Regency, Maluku Province (3°37'38.2"S, 128°18'25.0"E); RCLA.Ann.035 (3 males), RCLA.Ann.036 (2 females) and RCLA.Ann.037 (2 males), collected by Abraham S. Leatemia on 18–19 March 2014 from Ambon Island: Mahia Subvillage, Urimessing Village, Nusaniwe District, Ambon City, Maluku Province (3°44'42.6"S, 128°11'24.6"E). Diagnosis. Body color in alcohol cream with a striking dark brown band on dorsum of chaetiger 4. Paragnaths consisting of cones and bars arranged as follows. Area I = 4 (in a longitudinal line); Area II = 14; Area III = 19–22 (including lateral groups); Area IV = 26 (includes cones and bars); Area V = 0; Area VI = 3–6; Areas VII – VIII = 5–7 (in a transverse line). Males and females showing similar body pigmentation and natatory region extending to pygidium, yet different in numbers of pre-natatory chaetigers and modified dorsal and ventral cirri. Males with pre-natatory region comprising 21 or 22 chaetigers. Basally swollen dorsal and ventral cirri observed on chaetigers 1–7 and 1–5 or 6, respectively. Females with pre-natatory region comprising 26 chaetigers. Basally swollen dorsal and ventral cirri observed on chaetigers 1–6 and 1–5, respectively. Males with pygidial rosette and sub-distally swollen (not scalloped) dorsal cirri, lacking in females (Pamungkas and Glasby 2015). Distribution and habitat. The species was found in Maluku and West Nusa Tenggara (Indonesia) and Lizard Island (NE Australia), inhabiting intertidal rocky shore. Remarks. Neanthes cf. gisserana swarming as nyale on Lombok Island agrees well with the description of the species swarming as laor / wawo on Ambon Island referred to as Neanthes sp. cf. N. gisserana by Pamungkas and Glasby (2015). They are also very similar to the species collected from Lizard Island, northern Great Barrier Reef, Australia, identified by Glasby (2015). The worms possibly represent a new species and are likely to inhabit subtidal areas as the non-reproductive stage of this species has not been found in Indonesia. The non-reproductive stage is needed to describe this species.