Odontosyllis polycera ( Schmarda, 1861 )

Rodríguez, Yolanda Lucas, Martín, Guillermo San & Fiege, Dieter, 2019, A new species and nine new records of Syllidae (Annelida) from the Socotra Archipelago (Indian Ocean), Zootaxa 4651 (2), pp. 235-258: 250-251

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Odontosyllis polycera ( Schmarda, 1861 )


Odontosyllis polycera ( Schmarda, 1861) 

Figure 10View FIGURE 10

Syllis polycera Schmarda, 1861: 72  , pl. 28, fig. 219.— Augener, 1927: 152.— Day, 1967: 260, fig. 12.— Hutchings & Murray, 1984: 32.— Hartmann-Schröder, 1984: 20; 1985: 68, figs. 14–17; 1986: 41; 1989: 25; 1990: 51.

? Odontosyllis suteri  non Benham, 1915.— Haswell, 1920: 107.

Odontosyllis polycera San Martín & Hutchings, 2006: 58  , figs. 19A, B, 25E, F, 35A–F, 36A–F.

Material examined Socotra, Qataninh Bay ,12º21’293N 53º32’659E, under stones and coral rubble, 8–11 m, 09.04.2000, 1 specimen broken in three pieces (including 3 permanent slides with pharynx and proventricle dissected) ( SMF 24991View Materials)  .

Description. Body broad, with short, compressed segments. Specimen complete, broken in three pieces, about 142 chaetigers, pygidium present, probably in regeneration. Body white to yellowish in alcohol, without colour pattern, 24.5 mm long, 1.08 mm wide. Dorsally convex, ventrally more or less flattened. Prostomium oval, with two pairs of large, dark purple eyes in open trapezoidal arrangement; antennae short, small. Palps fused, bent ventrally. Dorsal tentacular cirri slightly longer than antennae, similar in length to body width, ventral tentacular cirri distinctly shorter than dorsal ones. Peristomium compressed, covered with a large occipital flap covering almost all prostomium. Antennae, tentacular, and dorsal cirri long, smooth to rugose. Dorsal cirri alternating long and short, becoming shorter posteriorly; long dorsal cirri in midbody slightly shorter than body width, short dorsal cirri approximately half the length of long ones; long dorsal cirri on most anterior segments slightly longer than body width. Ventral cirri shorter than parapodial lobes, globular and tough ( Fig. 10CView FIGURE 10). Compound chaetae similar along body, with spinose shafts, blades short, thick, hooked, bidentate, teeth well separate. Short spines on margin and thin spines in tendon ( Fig. 10AView FIGURE 10). Marked dorso-ventral gradation in size, being shorter dorsally and becoming longer as more ventral ( Fig. 10A, CView FIGURE 10); most dorsal blades with both teeth very similar, remaining blades with short, small proximal tooth. Median blades about 9–28 μm, approximately 12 chaetae in midbody fascicle. Midbody parapodia with three slender aciculae two of them with rounded tip and smallest with trilobed tip ( Fig. 10BView FIGURE 10). Pharynx short, through about five segments, 0.75 mm long, 0.6 mm wide with 5 teeth and 2 lateral plates ( Fig. 8DView FIGURE 8). Proventricle 2.5 mm long, 0.8 wide, with 70 rows of muscular cells ( Fig. 8DView FIGURE 8).

Remarks. This species has been reported in many different areas of the world (see below) at different depths ( San Martín & Hutchings 2006). Molecular studies should be conducted to understand the variability and distribution of this species. The specimen under study presents oocytes in midbody parapodia ( Fig. 10CView FIGURE 10, arrows).

Habitat. Occurring in sand, mud, algae, calcareous substrata, bryozoans, sponges, from intertidal to 90 m ( San Martín & Hutchings 2006). Under stones and coral rubble in the intertidal.

Distribution. Angola, Namibia, South Africa, USA (Southern California), Panamá, Indo-Pacific, New Zealand, Australia (Queensland, New South Wales, Tasmania, South Australia, Western Australia) ( San Martín & Hutchings, 2006).


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Odontosyllis polycera ( Schmarda, 1861 )

Rodríguez, Yolanda Lucas, Martín, Guillermo San & Fiege, Dieter 2019

Syllis polycera

Day, J. H. 1967: 260
Augener, H. 1927: 152
Schmarda, L. K. 1861: 72

Odontosyllis suteri

Haswell, W. H. 1920: 107

Odontosyllis polycera San Martín & Hutchings, 2006: 58

San Martin, G. & Hutchings, P. 2006: 58