Taxonomy
Descriptions
Holotype incomplete, with 33 chaetigerous segments, 2.3mm long. Colorless. Prostomium flattened and rounded, triangular, about two times wider than long. Eyes not visible (any more?). Palps as large lobes, basally fused, with small oval styles. Median antenna inserts close to posterior margin of prostomium, cylindrical, about three times as long as the prostomium. Lateral antennae insert near anterior margin of prostomium, smooth or wrinkled, about half as long as the median antenna. Dorsal cirri mostly curled up, more or less distinctly articulated. Ventral cirri digitiform, anteriorly and posteriorly longer, in mid-body about as long as the parapodial lobe, sometimes wrinkled.
Aciculae enlarged in chaetigers 2 to 6, in chaetigers 1 and 7 not as large as in chaetigers 2-6 but larger than in the rest of the body.
Dorsal simple chaeta from chaetiger 1, distally blunt, subdistally especially on lower edge with small serrated margin.
In first 13 chaetigers the upper one or two compound chaetae with long blades, almost spiniger-like. Below, in the first 5 parapodia chaetae thicker with short, stout, modified blades. Blades of chaetae in 6th chaetiger still modified but with slightly longer blades.From chaetiger 7 onwards normal and slender and from chaetiger 14 onwards blades show a dorso-ventral gradation in length within the fascicle. These blades are all bifid and finely serrated. Anteriorly 11 compound chaetae per parapod, mid-body 10 and posteriorly 9.
Pharynx extends over 8 segments, proventriculum over 6-7 segments, with about 40 muscle cell rows.
The following species have enlarged aciculae in chaetigers 2-6: S. aequiseta , S. magnapalpa , S. bidentata and S. templadoi . Of those only S. templadoi has spiniger-like blades and the proventriculum also consists of 40 muscle cell rows. However, the palps are not as large and all chaetae are unidentae in S. templadoi .
Sources
Distribution
Ecology
Shell debris with fine sand and stones, calcareous algae, bryozoans and hydrozoans.
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