Table 1. Diagnostic generic characters of Sthenelais Kinberg, 1856, Fimbriosthenelais Pettibone, 1971 and Eusthenelais McIntosh, 1876.
Character / Genus Sthenelais Fimbriosthenelais Eusthenelais
Prostomium
Length of lateral antennae Distinctly shorter than dorsal tentacular cirri Distinctly shorter than dorsal tentacular cirri As long as dorsal tentacular cirri
Segment 3
Pair of dorsal cirri Absent Absent Present
Neuropodia
Stylodes Smooth (occasionally minutely papillated) Distinctly papillated Smooth
Shape of posterior bract Bilobed Bilobed or truncate Bilobed
Neurochaetae
Compound falcigers Present (numerous) Present (numerous) Present (numerous)
Compound spinigers Absent or present (few) Absent Present (numerous)
Simple spinous chaetae Absent or present (few) Absent or present (few) Absent
persistent identifier: http://table.plazi.org/id/DF2A66501A221657FF7FF120FD83FEBA
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Published as part of Barnich, Ruth, Haaren, Ton Van (2021). Revision of Sthenelais Kinberg, 1856, Fimbriosthenelais Pettibone, 1971 and Eusthenelais McIntosh, 1876 (Polychaeta, Sigalionidae) in the Northeast Atlantic. European Journal of Taxonomy 740: 138-171. DOI: 10.5852/ejt.2021.740.1287, URL: http://dx.doi.org/10.5852/ejt.2021.740.1287 on page 141