FIGURE 1 in Jasmineira filatovae Levenstein, 1961, the deepest known sabellid is a Potamethus Chamberlin, 1919: redescription, new combination and generic emendation

FIGURE 1. Potamethus filatovae (Levenstein, 1961) n. comb., lectotype stained with methylene blue. A) Peristomial moldures and first three thoracic chaetigers, dorsal view, B) collar and base of radiolar crown, ventral view, C) base of radiolar crown, peristomium and first three thoracic chaetigers, lateral view, D) thorax, ventral view, E) mid-abdominal segments, ventral view, F) posterior end, dorsal view, G) distal ends of radioles. Abbreviations: apr—anterior peristomial ring, fg—faecal groove switch, pl—parallel lamella, pm)—peristomial moldure, vs—ventral sacs, vsc—ventral shield of collar. Numbers: 1, 2, 3 …—number of chaetigers. Scale bars: A–C, F) 500 um, D) 2 mm, E) 1 mm, G) 2.5 mm. White arrow and asterisk in B points to the incised mid-ventral margin of collar.