Ampharetidae Malmgren 1866
Creators
- 1. 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.
- 2. Department of General Ecology and Hydrobiology, Biological Faculty, Leninskiye Gory, 1, building 12, Moscow State University, Moscow, 119234, Russia.
Description
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
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Ampharetidae
- Kingdom
- Animalia
- Order
- Terebellida
- Phylum
- Annelida
- Scientific name authorship
- Malmgren
- Taxon rank
- family
- Taxonomic concept label
- Ampharetidae Malmgren, 1866 sec. Schiaparelli & Jirkov, 2021
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].