Polyophthalmus zhadanae Parapar & Al-Kandari & Candás & Moreira 2021, sp. nov.

• Main Authors: Parapar, Julio, Al-Kandari, Manal, Candás, María, Moreira, Juan
• Format: Other/Unknown Material
• Language: unknown
• Published: 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Opheliidae; Polyophthalmus; Polyophthalmus zhadanae; White Sea
• Online Access: https://zenodo.org/record/5579399; https://doi.org/10.5281/zenodo.5579399

Polyophthalmus zhadanae sp. nov. Figures 1−11, 13; Table 1 Material examined (Table 1). Type material. Holotype (Museo Nacional de Ciencias Naturales; MNCN 16.01/19108); 208 paratypes (Museo Nacional de Ciencias Naturales; MNCN 16.01/19098 to 16.01/19107 and 16.01/19109 to 16.01/19121); 9 paratypes (Kuwait Institute for Scientific Research; no reference numbers); 33 paratypes (Seckenberg Museum; SMF30263 to SMF30267); 57 paratypes (Zoological Museum of Moscow State University—White Sea Branch; ZMMU-WS16458 to ZMMU-WS16461); 68 paratypes (Australian Museum; W.53384 to W.53387). Non-type material. 1,041 specimens (KISR). Additional material studied. Polyophthalmus pictus (Dujardin, 1839). 70 specimens (MNCN 16.01/9402, 16.01/13213 and MNCN 16.01/19122 to 16.01/19124: Atlantic coast, Spain; MNCN 16.01/9375, 16.01/9392 and 16.01/9398: Mediterranean coast, Spain). Diagnosis. Parapodia biramous, chaetae emerging from body wall throughout; minute spherical dorsal and ventral parapodial cirri; inter-parapodial ciliated sensorial cilia present in all chaetigers and forming distinct lobes specially developed in anterior ones. Anal tube very short; posterior border with up to 6–7 pairs of digitate marginal papillae, of different length and often hidden inside anus. .continued on the next page .continued on the next page .continued on the next page .continued on the next page .continued on the next page Description. Holotype complete specimen, 13.0 mm long and 1.0 mm wide for 28 chaetigers (Fig. 2A); complete paratypes ranging from 10–12 mm in length and 0.5–1.0 mm in width, with up to 28 chaetigers. Body slender, tubular, tapering from last five chaetigers (Figs 2A, 3A, C); lateral and ventral grooves from anterior to posterior body end (Fig. 2A). Prostomium broadly rounded (Fig. 2B–C), with a low papilla on distal end (Figs 5A–B, E–F, 8B, 9A–B, 10A). Nuchal organs large, as deep oval lateral depressions (Figs 2B, 3B, 5A, C–E, 8C, 10A–C, 11C). Pharynx asymmetrical, dorsally lobate (Figs 3D–E, 5C–D, 8B, 9A). Parapodia ...