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. 2023 Oct 11;1182:35–134. doi: 10.3897/zookeys.1182.104258

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Robin S. Wilson, Christopher J. Glasby, Torkild Bakken

This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Figure 4. — Chaetae A chaetal shaft homogomph articulation Perinereisvallata spiniger NMV F53971 B chaetal shaft heterogomph articulation Perinereisvallata falciger NMV F53971 (= long-bossed heterogomph sensu Conde-Vela (2021) filled arrow points to boss C chaetal shaft sesquigomph articulation Ceratonereismirabilis (= short-bossed heterogomph sensu Conde-Vela (2021) filled arrow points to boss D heterogomph falcigers with long blades (a < b; = Type 0 of Bakken and Wilson (2005)) E heterogomph falcigers with extra-long blades (2× a < b; = Type 1 of Bakken and Wilson (2005)) F heterogomph falcigers with short blades (a ≥ b; = Type 2 of Bakken and Wilson (2005)) G heterogomph falciger blade with straight margin H heterogomph falciger blade with bowed margin I fused heterogomph falciger chaetiger 70 Hedistediversicolor complex AHF, Gilleleje, Denmark J fused falciger chaetiger 40 SimplisetiaaequisetisNMV F53970 K homogomph falciger with terminal tendon (filled arrow) and with terminal secondary tooth (open arrow; = bifid) Platynereisantipoda notopodial falciger chaetiger 66 NMV F50116 L sesquigomph falciger with terminal tendon absent but bifid with secondary terminal tooth (open arrow) and boss (filled arrow) Ceratonereismirabilis median chaetiger M homogomph falciger with smooth blade Nereiscirriseta chaetiger 74 N homogomph falcigers with bidentate blade and large adjacent terminal and subterminal teeth Nereisbifida chaetiger 71 O homogomph falciger with bidentate blade and large widely-separated terminal and subterminal teeth Nereistriangularis chaetiger 24 P homogomph falciger with multidentate blade with ≥ 2 large lateral teeth, first lateral tooth subequal to terminal tooth, subsequent teeth decreasing in size Nereisdenhamensis anterior chaetiger Q homogomph falciger with multidentate blade with ≥ 2 small lateral teeth, first and subsequent lateral teeth much smaller than terminal tooth Nereisapalie chaetiger 74. Sources: A–F, I–K, M–J R. Wilson drawings G, H edited after Villalobos-Guerrero et al. (2021: fig. 1e, f) L after Perkins (1980: fig. 1d) M–P redrawn after Hutchings and Turvey (1982)Q after Wilson (1985: fig. 1E). Not to scale; maximum widths of chaetal shafts (at articulation) are in the range 0.01–0.03 mm.