Ceratonereis undefined-1

Ceratonereis sp. 1 Fig. 3 A, B Material examined. MZB.Pol.00274 (5 specimens), collected by Joko Pamungkas on 23 November 2017 from Warmar Island: Siwalima Village, Aru Islands District, Aru Islands Regency, Maluku Province (5°45'26.9"S, 134°13'23.5"E); MZB.Pol.00275 (5 specimens), collected by Joko Pamungkas on 21 November 2017 from Ambon Island: Leahari Village, South Leitimur District, Ambon City, Maluku Province (3°42'32.1"S, 128°16'10.2"E). Diagnosis. Body segments gradually tapering posteriorly. Body color in alcohol cream or whitish with bronze pigmentation in some areas, including prostomium (extending to posterior parts of palpophores) and dorsal area of body segments (as transverse bronze striae resembling wood grain; most intense color from chaetigers 1 to 10, then becoming faint posteriorly). Prostomium with anterior margin deeply indented. Four black eyes present and arranged obliquely with distance between anterior eyes wider than that of posterior ones. Anterior eyes reniform; posterior eyes circular. Antennae subulate and multiarticulated. Palps biarticulated with cylindrical palpophores and pyriform palpostyles. Peristomium length greater than that of chaetiger 1. Four pairs of smooth peristomial cirri with distinct cirrophores present; longest cirri reaching chaetiger 12. Dorsal cirri evenly tapering and as long as parapodia. Paragnaths present on maxillary ring only. Notochaetae without homogomph falcigers; sesquigomph falcigers and sesquigomph spinigers present. Distribution and habitat. The species was obtained from Maluku, Indonesia, inhabiting intertidal rocky shore. Remarks. Five Ceratonereis species were previously reported to occur in Indonesia, i. e., Ceratonereis singularis australis Hartmann-Schröder, 1985 and Ceratonereis (Ceratonereis) cf. perkinsi Hartmann-Schröder, 1985 among wawo worms on Ambon Island – see Martens et al. (1995), Pamungkas (2015), Pamungkas and Glasby (2015). Also, Ceratonereis dorsolineata (Horst, 1924), Ceratonereis ternatensis (Fischli, 1900), and Ceratonereis tripartita Horst, 1918 – all these Indonesian species were described based on their modified reproductive forms, which are suboptimal for accurate species descriptions, in particular because paragnath counts often cannot be made accurately because of pharynx damage and paragnath resorption. Further identification is required to reveal the identity of the present species (comparative material is ideally needed).