Ampharetidae Malmgren 1866

• Main Authors: Schiaparelli, Stefano, Jirkov, Igor A.
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Ampharetidae; Antarctic; Southern Ocean; McIntosh; Malmgren; Annenkova; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5281/zenodo.4531816; https://zenodo.org/record/4531816

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 : Published as part of Schiaparelli, Stefano & Jirkov, Igor A., 2021, Contribution to the taxonomic knowledge of Ampharetidae (Annelida) from Antarctica with the description of Amage giacomobovei sp. nov., pp. 125-145 in European Journal of Taxonomy 733 on pages 138-139, DOI: 10.5852/ejt.2021.733.1227, http://zenodo.org/record/4529795 : {"references": ["Chamberlin R. V. 1919. The Annelida Polychaeta [Albatross Expeditions]. Memoirs of the Museum of Comparative Zoology at Harvard College 48: 1 - 514. Available from https: // www. biodiversitylibrary. org / ia / memoirsofmuseumo 4801 harv / page / 11 / mode / 1 up [accessed 22 Jan. 2021].", "Malmgren A. J. 1866. Nordiska Hafs-Annulater. Ofversigt af Koniglich Vetenskapsakademiens Forhandlingar, Stockholm 22 (3): 355 - 410. Available from https: // biodiversitylibrary. org / page / 32339631 [accessed 22 Jan. 2021].", "Schuller M. & Jirkov I. A. 2013. New Ampharetidae (Polychaeta) from the deep Southern Ocean and shallow Patagonian waters. Zootaxa 3692 (1): 204 - 237. https: // doi. org / 10.11646 / zootaxa. 3692.1.11", "Benham W. B. 1921. Polychaeta. Australasian Antarctic Expedition 1911 - 1914, Scientific Reports, Series C - Zoology and Botany 6 (3): 1 - 128. Australasian Antarctic Expedition, Sydney. Available from https: // doi. org / 10.5962 / bhl. title. 16201 [accessed 22 Jan. 2021]."]}