Contribution to the taxonomic knowledge of Ampharetidae (Annelida) from Antarctica with the description of Amage giacomobovei sp. nov. Author Schiaparelli, Stefano D5CF0ED9-9A7C-45D4-B4E1-895D56CA160A Dipartimento di Scienze della Terra dell’Ambiente e della Vita (DISTAV), Università di Genova, C. so Europa 26, I- 16132, Genova, Italy. Museo Nazionale Dell’Antartide (MNA, Sede di Genova), Viale Benedetto XV N ° 5, I- 16132, Genova, Italy. Department of General Ecology and Hydrobiology, Biological Faculty, Leninskiye Gory, 1, building 12, Moscow State University, Moscow, 119234, Russia. stefano.schiaparelli@unige.it Author Jirkov, Igor A. C611DB01-CF14-4549-B2D8-24D498D9859A Department of General Ecology and Hydrobiology, Biological Faculty, Leninskiye Gory, 1, building 12, Moscow State University, Moscow, 119234, Russia. ampharete@ya.ru text European Journal of Taxonomy 2021 2021-02-08 733 125 145 journal article 8326 10.5852/ejt.2021.733.1227 5268baff-3074-40c5-ae0f-f799f2c8d8c2 2118-9773 4529795 1AAE62AF-ABD9-4930-B1DE-2C05F66BEC4A Key to Ampharetidae genera occurring in Antarctica In order to simplify the task of genera recognition of not trained people we have assembled a dichotomic key hoping that this would speed the recognition of the different Antarctic ampharetid genera. 1. Three or four anterior segments with vertical rows of minute acicular chaetae ................................. ...................................................................................................... Melinninae Chamberlin, 1919 ...2 – Minute acicular chaetae absent ................................................ Ampharetinae Malmgren, 1866 …3 2. Hooks (usually one pair) and dorsal crest (usually one and dentate) behind the branchiae present ........................................................................................................ Melinna Malmgren, 1866 – Hooks absent, dorsal crest present .............................................. Melinnides Wesenberg-Lund, 1950 (= Melinnantipoda ) – Hooks and dorsal crest absent ............................................................... Melinnopsis McIntosh, 1885 (= Amelinna , Melinnexis , Melinnopsides ) 3. Buccal tentacles attached outside the mouth, methylene blue staining pattern of ventral glandular shields well marked ............................................................. Noanelia Desbruyères & Laubier, 1977 – Buccal tentacles attached inside the mouth (seldom may be everted), methylene blue staining pattern of ventral glandular shields poor marked ......................................................................................... 4 4. Prostomium Amphicteis -like: with prominent straight transversal nuchal ridges; middle lobe anteriorly more of less incised, usually with pair of longitudinal ridges; rudimental notopodia AU1 several times smaller than normal thoracic ................................................. Amphicteis Grube, 1850 – Prostomium Ampharete or Amage -like: trilobed, without prominent nuchal organs or ridges; middle lobe anteriorly rounded; rudimental notopodia AU1 several times smaller normal thoracic or absent ................................................................................................................................................ 5 – Prostomium without lobes, without prominent nuchal organs or ridges ........................................ 13 5. Middle lobe of prostomium anteriorly incised or with horns ( Fig. 1 A–B) ...................................... 6 – Middle lobe of prostomium anteriorly rounded or pointed .............................................................. 8 6. Abdominal neuropodia with very long cirri, longer than width of segment ...................................... .............................................................................................................. Samythopsis McIntosh, 1885 (= Neopaiwa , Paiwa , Weddelia ) – Abdominal neuropodial cirri, if present much shorter than width of segment ( Fig. 1G ) ................. 7 7. All abdominal neuropodia, including AU1 pinnuli ( Fig. 1G ), no more than 16 AU .......................... ...................................................................................................................... Amage Malmgren, 1866 (= Egamella , Mexamage , Paramage , Phyllampharete ) – All abdominal neuropodia pinnula, except AU1, neuropodia AU1 tori (like thoracic), more than 20 AU ......................................................................................................... Grubianella McIntosh, 1885 8. Distinct transversal dorsal ridge between TC3 and TC4 present ........................................................ ................................................................................................... Melinnampharete Annenkova, 1937 (= Eusamytha Hartman, 1967 non McIntosh, 1885, Eusamythella , Neosamytha ) – Dorsal ridge absent ........................................................................................................................... 9 9. One, usually from 5 th (4 th– 6 th ) to the last pair of posterior notopodia slightly shifted dorsally and connected by low ridge .......................................................................... Anobothrus Levinsen, 1884 – One pair of posterior notopodia (last, 2 nd or 3 rd from last) flattened and shifted dorsally .................. ...................................................................................................................... Sosane Malmgren, 1866 – Posterior notopodia neither flattened, nor shifted dorsally, ridges also absent ............................... 10 10. 1 st segment with ‘horns’ .................................................................. Abderos Schüller & Jirkov, 2013 – 1 st segment without ‘horns’ ..............................................................................................................11 11. Lower lip enlarged, longitudinally grooved ............................................... Lysippe Malmgren, 1866 (= Lysippides , Paralysippe , Pseudampharete , Pterolysippe , Samytha ) – Lower lip not enlarged .................................................................................................................... 12 12. A pair of nephridial papillae medially behind the branchiae. Paleae well developed, paleal chaetae bigger then most developed notochaetae (paleae of species outside Antarctic may be smaller or even absent) .................................................................................................... Ampharete Malmgren, 1866 (= Asabellides , Parampharete , Pseudosabellides , Pterampharete , Sabellides ,? Amythasides ) – Nephridial palillae medially behind the branchiae absent ( Fig. 4C ). Paleae absent ........................... ....................................................................................................................... Amythas Benham, 1921 13. Two last pairs of notopodia (or only second counting from the back) slightly shifted dorsally and connected by low, transverse ridges ............................................................. Zatsepinia Jirkov, 1986 – Dorsally shifted notopodia and dorsal transverse ridges absent ..................................................... 14 14. Prostomium with pair of tranversal nuchal organs ......................................................................... 15 – Prostomium without nuchal organs ............................................. Glyphanostomum Levinsen, 1884 15. The shape of neuropodia slightly changed along the body ( Fig. 5B ) ....... Phyllocomus Grube, 1877 (= Shistocomus ,? Amphisamytha ) – Neuropodia of thorax, AU1, and AU2 are tori, the rest are abdominal pinnuli, change is well marked .................................................................................................... Neosabellides Hessle, 1917