Syllis cf. parapari San Martín & López, 2000

Aguado, Teresa, Martín, Guillermo San & Ten, Harry A., 2008, Syllidae (Annelida: Polychaeta) from Indonesia collected by the Siboga (1899 – 1900) and Snellius II (1984) expeditions, Zootaxa 1673, pp. 1-48 : 31-33

Syllis cf. parapari San Martín & López, 2000

Fig. 14

Material examined. 1 spec. ZMA V.Pol. 1998 (as Syllis cerina ), Indonesia, Sulawesi, Buton Strait, Lohio Bay, dredge, townet, muddy bottom, 22 m, Siboga Expedition, Sta. 205, 20 Sept. 1899.

Comparative material examined. Syllis parapari Holotype MNCN 16.01/6070, Spain, ría de El Ferrol, gravel, sublittoral, 43º27´1´´N 8º19´16´´W, 2 Jun. 1987, on permanent microscope slide; Paratypes MNCN 16.01/6071, Spain, ría de El Ferrol, muddy sand, 21 m, 43º27.49´´N 8º16.42´´W, 5 Aug. 1987, two spec. on permanent microscope slides; MNCN 16.01/6072, Spain, ría de El Ferrol, muddy sand, 15 m, 43º27´26´´N 8º20´06´´W, 6 Jul. 1987, one spec. on permanent microscope slide; MNCN 6.01/6074, Spain, off ría de Muros, muddy sand with shells, 85 m, 42º41.6´N 9º10.3´W, 11 Jun. 1991; MNCN 16.01/6075, Spain, off Cabo Finisterre, rocky botton, 129–133 m, 42º51.89´N 9º21.19´W, 11 jun. 1991; MNCN 16.01/6076, Spain, NW Sisargas Is., black mud, 157–159 m, 43º26´N 8º59.35´W, 12 Jun. 1991; MNCN 16.01/6077, Spain, off Girón, biocenosis of Dendrophyllia ramea , 116–120 m, 43º43,71´N 5º56.21´W, 15 Jun. 1991; MNCN 16.01/ 6078, Spain, off San Sebastián, mud, 135–143 m, 43º29.72´N 2º0.89´W, 22 Jun. 1991.

Description. Specimen 11.6 mm long, 0.8 mm wide, with 101 segments. Body strongly pigmented red. Prostomium wider than long, with two pairs of eyes in trapezoidal arrangement, posterior ones larger than anterior pair, eye spots absent. Median antenna inserted on middle of prostomium, between anterior pair of eyes, longer than combined length of prostomium and palps, with 25 articles; shorter lateral antennae inserted at anterior margin of prostomium, with 15–18 articles. Palps triangular, longer than prostomium. Peristomium similar in length to subsequent segments ( Fig. 14 A). Dorsal tentacular cirri similar in length to median antenna, with 15 articles, ventral ones shorter with 13 articles. Articles of dorsal cirri basally broad, distally tapering. Anterior dorsal cirri with 14–15 articles, some of them shorter with 10–11 articles. Midbody and posterior dorsal cirri all short, with 8–10 articles. Cirrophores present. Anterior ventral cirri digitiform, inserted proximally and exceeding length of parapodia. Posteriorly, ventral cirri becoming shorter, not extending beyond parapodia. Anterior parapodia each with eight to nine bidentate, compound, heterogomph chaetae, two pseudospiniger blades (ca. 75 µm), remaining falcigers (ca. 28–30 µm), both groups with spines on blade edge ( Fig. 14 C). Midbody chaetigers with two pseudospinigers shorter than anterior ones (ca. 60 µm) and eight falcigers (ca. 25–30 µm) ( Fig. 14 D). Posterior chaetigers with one or two shorter pseudospinigers (ca. 50 µm), and six to seven falcigers (ca. 20–24 µm) ( Fig. 14 F). Simple dorsal chaetae unidentate, with short subdistal spines on edge and single ventral chaeta, bidentate, with small proximal tooth and short spines on edge, both on posterior parapodia. Anterior parapodia with four to six pointed and acuminate aciculae ( Fig. 14 B) gradually decreasing in number to one or two posteriorly ( Fig. 14 E). Pygidium regenerating, anal cirri absent. Pharynx extending through seven segments; conical tooth located on anterior margin. Proventricle through nine segments, cell-rows difficult to ascertain ( Fig. 14 A).

Remarks. Some specimens from the Iberian coasts of the Atlantic Ocean, originally identified as S. cornuta by Campoy (1982) and Parapar et al. (1996), were re-described by San Martín & López (2000) as S. parapari because they were clearly different with regards to the shape of aciculae and shape and length of dorsal cirri. The specimen from Indonesia agrees with the description and type series of S. parapari . Although reexamination of the presumedly worldwide S. cornuta might reveal misidentified populations of S. parapari between Spain and Indonesia, we prefer to maintain our doubt on the identity of our single Indonesian specimen.

Distribution. Indonesia. The nominal species occurs in the Atlantic Ocean ( Spain).

Figures

FIGURE 14. Syllis cf. parapari ZMA V. Pol. 1958. A: Anterior part, dorsal view; B: Anterior aciculae; C: Anterior chaetae; D: Midbody chaetae; E: Posterior aciculae; F: Posterior chaetae. Scale A: 0.4 mm; B – F: 20 µm.