TABLE 1. Comparison between the genera Jasmineira Langerhans, 1880 in Jasmineira filatovae Levenstein, 1961, the deepest known sabellid is a Potamethus Chamberlin, 1919: redescription, new combination and generic emendation

TABLE 1. Comparison between the genera Jasmineira Langerhans, 1880 and Potamethus Chamberlin, 1919 based mostly on Capa et al. (2019) and references therein cited, but see remarks. Jasmineira Langerhans, 1880Potamethus Chamberlin, 1919Abscission zone above radiolar basesPresent in some speciesNot reportedInter-radiolar membraneAbsentAbsent or present (this study)Radiolar flangesAbsentAbsentDorsal lipsWith or without radiolar appendages (mid-rib)With radiolar appendages (mid-rib)Ventral sacsAbsentPresentParallel lamellaeAbsentPresentPeristomial vascular loopsPresent in some speciesAbsentAnterior peristomial ringWith a narrow ventral lobeWith a narrow ventral lobeSemi-circular moldures in lateral sides of anterior peristomial ringAbsentPresent in some species (this study)Posterior peristomial ring (collar)Not elongateDistinctly elongateGlandular ridge on chaetiger 2PresentPresent or absent (this study)Ventral glandular shieldsPresent or absent (absent in J. schaudinni: this study)Present or absent (this study)Bayonet chaetae (inferior thoracic notochaeta)PresentAbsentCompanion chaetae (thoracic neuropodial chaetae)AbsentPresentThoracic unciniAcicular with hoods (size of handles was not indicated)Avicular with long sized handles; hood absentAbdominal unciniAvicular with breast reduced to narrow swelling and distinctly elongate neck between breast and main fangAvicular with breast reduced to narrow swelling, distinctly elongate neck between breast and main fang. A small hump on the angle between external margin of neck and handle (this study)Pygidial cirrusAbsent or presentAbsent表1 基于Capa等（2019）及其引用文献（详见备注）对茉莉虫属（Jasmineira Langerhans, 1880）与Potamethus Chamberlin, 1919属的形态比较 1. 辐基上方脱落区：茉莉虫属部分物种存在；Potamethus属未见报道 2. 辐间膜：茉莉虫属无；Potamethus属存在或缺失（本研究） 3. 辐缘突：茉莉虫属无；Potamethus属无 4. 背唇：茉莉虫属具或不具辐状附属物（中肋）；Potamethus属具辐状附属物（中肋） 5. 腹囊：茉莉虫属无；Potamethus属存在 6. 平行片层：茉莉虫属无；Potamethus属存在 7. 围口血管环：茉莉虫属部分物种存在；Potamethus属无 8. 前围口环：茉莉虫属具狭窄腹叶；Potamethus属具狭窄腹叶 9. 前围口环侧面的半圆形模铸结构：茉莉虫属无；Potamethus属部分物种存在（本研究） 10. 后围口环（领）：茉莉虫属不伸长；Potamethus属明显伸长 11. 第2刚节腺脊：茉莉虫属存在；Potamethus属存在或缺失（本研究） 12. 腹腺盾：茉莉虫属存在或缺失（J. schaudinni缺失：本研究）；Potamethus属存在或缺失（本研究） 13. 刺刀状刚毛（胸区下位背刚毛）：茉莉虫属存在；Potamethus属缺失 14. 伴生刚毛（胸区神经叶刚毛）：茉莉虫属缺失；Potamethus属存在 15. 胸区钩刚毛：茉莉虫属为针状且具罩（柄尺寸未标注）；Potamethus属为鸟头状，柄长，无罩 16. 腹区钩刚毛：茉莉虫属的柄部基板窄缩为肿胀状，基板与主齿间具明显伸长的颈；Potamethus属的柄部基板窄缩为肿胀状，基板与主齿间具明显伸长的颈，且颈外缘与柄夹角处具一小突起（本研究） 17. 肛须：茉莉虫属存在或缺失；Potamethus属缺失