Perinereis singaporiensis

Perinereis singaporiensis (Grube, 1878) Fig. 10 A, B Nereis (Perinereis) singaporiensis Grube, 1878: 84–85. Horst 1924: 169 –170, pl. XXXIV, figs 1, 2. Perinereis singaporiensis. – Pruvot 1930: 55 –56, pl. 3, figs 62–64. Fauvel 1932: 103. Wu 1967: 67 –68. Hylleberg et al. 1986: 9 –10, fig. 5 A – K. Hutchings et al. 1991: 262 –263, fig. 15 a – e. Type locality. Singapore. Material examined. MZB.Pol.00287 (3 specimens), collected by Joko Pamungkas on 15 December 2017 from Lembeh Island: Mawali Urban Village, North Lembeh District, Bitung City, North Sulawesi Province (1°26'35.3"N, 125°13'48.9"E). Diagnosis. Body color in alcohol cream with brown pigmentation on dorsum of anterior and median chaetigers, fading posteriorly. Prostomium trapezoidal, elongate, rectangular anteriorly. Eyes with distinct lenses. Antennae triangular. Palps with small round palpostyles. Longest tentacular cirri extending to chaetiger 4. Peristomium relatively long. Pharynx with conical paragnaths on both rings, smooth bars present on Area VI, arranged as follows. Area I = 1–2; Area II = 7–21; Area III = 14–41 in a central patch with up to eight cones laterally placed, separate from this group; Area IV = 14–36; Area V = 3; Area VI = 2 (as paired bars); Area VII = 34–56 in two rows. Paragnaths on maxillary edge of oral ring smaller than those in oral or posterior position. Area IV without bars. Neurochaetae with homogomph spinigers and heterogomph falcigers in supra-acicular fascicle, and heterogomph spinigers as well as heterogomph falcigers in subacicular fascicle (Hutchings et al. 1991). Distribution and habitat. The species was found in Australia, India, Indonesia, New Caledonia, Philippines, Singapore, and Taiwan, inhabiting intertidal sandy shores with reef rubble. Remarks. The specimens in the present study agree well with previous descriptions and represent the first record of this species in the MZB collection. Characteristic features are the paired bar-shaped paragnaths on each Area VI.