Syllis sp. 1

Gunton, Laetitia M., Kupriyanova, Elena K., Alvestad, Tom, Avery, Lynda, Blake, James A., Biriukova, Olga, Boeggemann, Markus, Borisova, Polina, Budaeva, Nataliya, Burghardt, Ingo, Capa, Maria, Georgieva, Magdalena N., Glasby, Christopher J., Hsueh, Pan-Wen, Hutchings, Pat, Jimi, Naoto, Kongsrud, Jon A., Langeneck, Joachim, Meissner, Karin, Murray, Anna, Nikolic, Mark, Paxton, Hannelore, Ramos, Dino, Schulze, Anja, Sobczyk, Robert, Watson, Charlotte, Wiklund, Helena, Wilson, Robin S., Zhadan, Anna & Zhang, Jinghuai, 2021, Annelids of the eastern Australian abyss collected by the 2017 RV ' Investigator' voyage, ZooKeys 1020, pp. 1-198 : 1

Syllis sp. 1

Diagnosis.

Palps free to base. Two pairs of eyes, prostomium broad. Pharynx everted, single anterior tooth present, ten soft papillae around rim. Pharynx extending to chaetiger 8, proventriculus extends through another 9-10 segments. Body large anteriorly, tapering posteriorly. Parapodia all short, ventral cirri short, dorsal cirri all articulate, long, thin, some curled, alternating lengths after ~ chaetiger 10, some articles longer in posterior dorsal cirri; dorsal cirri present on chaetiger 2. Chaetae in anterior segments with at least one large aciculum per chaetiger, projecting tip curved in anterior chaetigers, tip straight in mid-body and curved in posterior chaetigers, plus a few other thinner, straight aciculae (tapering tips) in mid- and posterior body chaetigers; chaetae all compound falcigers, at least ten per chaetiger: very short, finely serrated blades with bidentate tips; anteriorly, chaetal blades fine with small subdistal tooth, almost unidentate; posteriorly, teeth almost subequal; some shafts of falcigers with acute asymmetric extension; pseudocompound falcigers absent; simple dorsal chaetae present in posterior chaetigers, slender, slightly curving and distally minutely bifid.

Remarks.

Specimen were in sponge collected with echinoderms. It is not S. sclerolaema Ehlers, 1901, which has pseudocompound chaetae.

Records.

1 specimen. Suppl. material 1: op. 69 (AM).