Perinereis obfuscata

Perinereis obfuscata (Grube, 1878) Fig. 9 D – F Nereis (Perinereis) obfuscata Grube, 1878: 86–87. Horst 1924: 173 –174, pl. 34, figs 5, 6. Nereis obfuscata. – Ehlers 1920: 51. Perinereis cultrifera var. obfuscata. – Monro 1939: 398 –399. Perinereis obfuscata. – Monro 1931: 16 –18, fig. 10 a – d. Hutchings et al. 1991: 257 –258, fig. 12 a – c. Type locality. Philippines. Material examined. MZB.Pol.00288 (2 specimens) and MZB.Pol.00342 (1 epitokous specimen), collected by Joko Pamungkas on 19 December 2017 from Barrang Lompo Island: Barrang Lompo Village, Sangkarrang Island District, Makassar City, South Sulawesi Province (5°02'45.7"S, 119°19'43.4"E); MZB.Pol.00289 (4 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.00291 (1 specimen), collected by Joko Pamungkas on 17 November 2017 from Biak Island: Yenusi Village, East Biak District, Biak Numfor Regency, Papua Province (1°10'32.0"S, 136°12'23.9"E). Diagnosis. Body color in alcohol cream with brown pigmentation on prostomium and three transverse patches on anterior dorsal chaetigers. Prostomium trapezoidal with shallow anterior median furrow. Palps with cylindrical palpophores and rounded palpostyles. Longest tentacular cirri extending to chaetiger 1. Peristomium relatively long. Pharynx with conical paragnaths on both rings, smooth bars present on Area VI, arranged as follows. Area I = 2–9; Area II = 7–27 in 23 crescent-shaped rows (usually between 10–20); Area III = 13–32, sometimes with one or two cones displaced laterally, separate from the main group; Area IV = 10–31; Area V = 1 (very rarely 2); Area VI = 1 short crescent-shaped bar; Areas VII – VIII = 22–38 in two rows. Area IV without bars. Neurochaetae with homogomph spinigers and heterogomph falcigers in supra-acicular fascicle; heterogomph falcigers and few heterogomph spinigers in subacicular fascicle (Hutchings et al. 1991). Distribution and habitat. The species was found in Australia, Indonesia, and Philippines, inhabiting intertidal sandy shores with reef rubble. Remarks. The specimens in the present study agree well with previous descriptions. These specimens represent the first record of this species in the MZB collection. Characteristic features are the prominent paragnaths of the oral ring, including the single short crescent-shaped bars on each Area VI.