Scolelepis (Scolelepis) lingulata Imajima, 1992

Zhou, Jin, Ji, Weiwei & Li, Xinzheng, 2009, A new species of Scolelepis (Polychaeta: Spionidae) from sandy beaches in China, with a review of Chinese Scolelepis species, Zootaxa 2236, pp. 37-49 : 42-45

Scolelepis (Scolelepis) lingulata Imajima, 1992

Figure 3

Scolelepis (Scolelepis) lingulata Imajima, 1992: 7 –10, figs. 4–5.

Material examined. MBMCAS 0 20734 (1 spm), 120°45΄ E, 37°30΄ N, Bohai Sea, sandy mud, 26 m, 30 Apr 1959, coll. Mu Chen; MBMCAS 0 20735 (1 spm), 122°45΄ E, 39°00΄ N, Bohai Sea, silty mud, 22.8 m, 18 Apr 1959; MBMCAS 0 20736 (1 spm), 121°30΄ E, 40°30΄ N, Bohai Sea, sandy mud, 20 m, 1 Nov 1958, coll. Yuhang Cui; MBMCAS 0 20737 (2 spms), 123°00΄ E, 32°00΄ N, East China Sea, sand with debris, 34 m, 13 May 1959, coll. Baolin Zhang; MBMCAS 0 20738 (1 spm), 123°30΄ E, 31°30΄ N, East China Sea, sandy mud, 45 m, 14 May 1959, coll. Baolin Zhang; MBMCAS 0 20861 (2 spms), 113°00΄ E, 21°15΄ N, South China Sea, sandy mud, 45 m, 10 Feb 1960, coll. Shenpeng Shen; MBMCAS 0 20862 (1 spm), 110°45΄ E, 20°48΄ N, South China Sea, sandy mud, 20 m, 11 Jul 1959; MBMCAS 0 20863 (2 spms), 111°15΄ E, 20°00΄ N, East China Sea, silty mud, 52 m, 25 Apr 1959, coll. Xiutong Ma; MBMCAS 0 20864 (1 spm), 112°30΄ E, 21°15΄ N, South China Sea, sandy mud, 41 m, 21 Oct 1959, coll. Yongliang Wang; MBMCAS 0 20865 (1 spm), 111°00΄ E, 21°00΄ N, South China Sea, sandy mud, 25.8 m, 30 Oct 1959; MBMCAS 0 20866 (2 spms), 109°00΄ E, 21°24΄ N, South China Sea, sandy mud, 41 m, 20 Apr 1959; MBMCAS 198575 (2 spms), 123°00΄ E, 31°30΄ N, Changjiang River Estuary, sandy mud, 34 m, 17 Oct 1985, coll. Bin Sun; MBMCAS 198602 (2 spms), 122°30΄ E, 37°40΄ N, Yellow Sea, silty mud, 25 m, 20 Oct 1959, coll. Jinxiang Jiang; MBMCAS 228688 (1 spm), 122°00΄ E, 33°00΄ N, East China Sea, sandy mud, 33 m, 13 Jan 1959, coll. Yuhang Cui; MBMCAS 228991 (1 spm), st. 31007, East China Sea, sandy mud, 44 m, 26 Nov 1961, coll. Baolin Zhang; MBMCAS 229142 (1 spm), 123°30΄ E, 32°00΄ N, Changjiang River Estuary, sandy mud, 41 m, 7 Sep 1985, coll. Wenlong Li; MBMCAS 229143 (1 spm), st. J1, Changjiang River Estuary, sandy mud, 10 m, 12 Sep 1985, coll. Wenlong Li.

Description. Prostomium elongated, with pointed anterior margin. Caruncle extending posteriorly to setiger 1. Occipital tentacle present. Two pairs of eyes arranged in a transverse row. Peristomium distinct from setiger 1, forming well-developed lateral wings ( Fig. 3 A).

Parapodia of setiger 1 well developed; notopodial postsetal lamellae conical and neuropodial postsetal lamellae large, subtriangular, with capillary setae in both rami ( Fig. 3 B). Branchiae present from setiger 2, continuing posteriorly to end of body. Notopodial postsetal lamellae distally free from branchiae, long, narrow with ruffled edge in anterior setigers ( Fig. 3 C–D). Posterior lamellae triangular with elongated pointed tip, nearly equal in length through posterior setigers ( Fig. 3 E). Neuropodial postsetal lamellae small and rounded anteriorly; slight notch present from setigers 23–27; lamellae divided into low, rounded interramal lobe and small triangular ventral lobe. Neuropodial presetal lamellae thick and round, from setiger 2 to posterior setigers; smaller than corresponding neuropodial postsetal lamellae.

All anterior setae capillaries, arranged in two rows on both rami. Anterior row thick, heavily granulated, posterior row thin capillaries without obvious sheaths ( Fig. 3 F–I). Neuropodial hooded hooks from setiger 21, unidentate, with open hoods ( Fig. 3 J), up to nine in a series, accompanied by capillaries. Notopodial hooded hooks absent.

Pygidium with ventral cushion, anus opening dorsally ( Fig. 3 K).

Remarks. The specimens agree well with previous descriptions and illustrations. Scolelepis (S.) lingulata is a common species in Chinese coastal waters (Bohai Sea, Yellow Sea, East China Sea, South China Sea). It seems that previous S. (S.) lingulata specimens have probably been misidentified because this species has never been reported in China. However, it can be easily distinguished from other Chinese Scolelepis species by the presence of an occipital tentacle. The species is newly reported for the Chinese Scolelepis fauna.

Distribution. China (Yellow Sea, Changjiang River Estuary, East China Sea; 10–52 m); Japan.

Figures

FIGURE 3. Scolelepis (Scolelepis) lingulata Imajima, 1992. A, anterior end, dorsal view; B, parapodia of setiger 1, anterior view; C, parapodia of setiger 2, anterior view; D, parapodia of setiger 12, anterior view; E, parapodia of setiger 22, anterior view; F, notopodial seta from anterior row of setiger 4; G, notopodial seta from posterior row of setiger 4; H, neuropodial seta from anterior row of setiger 4; I, neuropodial seta from posterior row of setiger 4; J, neuropodial hooded hook from setiger 30; K, pygidium, dorsal view. Scales: A, 600 μm; B – E, 120 μm; F – J, 250 μm; K, 100 μm.