Sigambra Muller 1858

• Main Authors: Bhowmik, Moumita, Ghoshal, Priya, Salazar-Vallejo, Sergio I., Mandal, Sumit
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Pilargidae; Sigambra; Arctic; Arctic Ocean; Pacific; Indian; Rugosa; Gonzalez; Paterson; Treadwell
• Online Access: https://dx.doi.org/10.5281/zenodo.4672235; https://zenodo.org/record/4672235

Key to species of Sigambra Müller, 1858 (modified after Salazar-Vallejo et al . 2019) 1. Dorsal cirri larger than ventral cirri................................................................................................... 2 – Dorsal and ventral cirri subequal..................................................................................................... 26 2. Chaetiger 2 without ventral cirri........................................................................................................ 3 – Chaetiger 2 with ventral cirri........................................................................................................... 22 3. Pharynx with 8 marginal papillae...................................................................................................... 4 – Pharynx with 13–16 marginal papillae.............................................................................................. 7 4. Dorsal hooks from chaetigers 3–8..................................................................................................... 5 – Dorsal hooks from chaetigers 15–17 (5–18 mm long; up to chaetiger 30?); median and posterior notopodia with 1 capillary; median antenna long, reaching chaetiger 7......... S. vargasi Dean, 1999 5. Median and posterior notopodia with capillaries............................................................................... 6 – Notopodia without capillaries; all neurochaetae with tips entire; median antennae reaching chaetiger 5 (17–23 mm long).................................................... S. papagayu Bamber in Muir & Bamber, 2008 6. Some neurochaetae with bifid tips; median antenna barely longer than laterals, reaching chaetiger 2; median and posterior notopodia with 2 capillaries......... S. bidentata Britayev & Saphronova, 1981 – All neurochaetae with entire tip; median antenna markedly longer than laterals, reaching chaetiger 3; median and posterior notopodia with 1 capillary....... S. qingdaoensis Licher & Westheide, 1997 7. Dorsal hooks from anterior chaetigers (4–18)................................................................................... 8 – Dorsal hooks from median chaetigers (30–40); median antenna twice as long as lateral ones or longer............................................................................................................................................. 21 – Dorsal hooks from posterior chaetigers (42–66), or beyond that (14 mm long); median antenna as long as lateral ones, barely reaching chaetiger 1........................................ S. rugosa Fauchald, 1972 8. Tentacular segment about twice as wide as long............................................................................... 9 – Tentacular segment 4 times as wide as long.....................................................................................11 9. Tentacular segment with anterior margin with rounded projected lobes, external to lateral antennae................................................................................................. Sigambra sp. indet. * (Brazil) – Tentacular segment with anterior margin smooth, without projected lateral lobes; dorsal hooks from chaetiger 3–4 (14 mm long)............................................................................................................. 10 10. Antennae of similar length; dorsal cirri of median segments 5 times as long as wide.............................................................................................................................................. S. setosa Fauchald, 1972 – Median antenna almost twice as long as lateral ones; dorsal cirri of median segments 3 times as long as wide................................................................................ S. phuketensis Licher & Westheide 1997 11. Tentacular segment with rounded projected lobes in anterior margin; median antenna slightly longer than lateral ones, reaching chaetigers 3–4....................................................................................... 12 – Tentacular segment with anterior margin smooth, without rounded projected lobes...................... 13 12. Dorsal hooks from chaetigers 4–5 (6–12 mm long)........................................... S. parva (Day, 1963) – Dorsal hooks from chaetiger 8 (2–9 mm long)......................................... S. sundarbanensis sp. nov. 13. Median and posterior notopodia with capillaries............................................................................. 14 – Notopodia without capillaries.......................................................................................................... 20 14. Median antenna short, reaching up to chaetigers 3–4...................................................................... 15 – Median antenna medium-sized, reaching chaetigers 5–7................................................................ 16 – Median antenna long, reaching chaetigers 9–12; dorsal hooks of chaetigers 11–15 (40 mm long); lateral antennae without lateral depressions.............................................. S. bassi sensu Blake, 1994 15. Dorsal hooks from chaetiger 4 (15 mm long); median antenna slightly longer than lateral ones; first dorsal cirri slightly longer than dorsal tentacular ones.................... S. tentaculata sensu Blake, 1994 – Dorsal hooks from chaetiger 12–18 (16 mm long); median antenna twice as long as lateral ones; first dorsal cirri markedly longer than dorsal tentacular ones.... S. elegans Britayev & Saphronova, 1981 16. Median antenna slightly longer than lateral ones, reaching chaetigers 4–6; dorsal hooks from chaetigers 7–10 (5.5 mm long)........................................... S. pettiboneae Hartmann-Schröder, 1979 – Median antenna twice as long as lateral ones.................................................................................. 17 17. Median antenna reaching chaetigers 7–8......................................................................................... 18 – Median antenna reaching up to chaetigers 5–6; dorsal hooks from chaetigers 4–5........................ 19 18. Dorsal hooks from chaetigers 3–9 (5–20 mm long)............................. S. hanaokai (Kitamori, 1960) – Dorsal hooks from chaetigers 12–18 (24 mm long).................................... S. bassi (Hartman, 1947) 19. All parapodia with ventral cirri shorter than neuropodial lobes; dorsal cirri basally wider......................................................................................................................... S. tentaculata (Treadwell, 1941) – Median and posterior parapodia with ventral cirri long, reaching tip of neuropodial lobes; dorsal cirri tapered, not wider basally............................................................ S. diazi Salazar-Vallejo et al ., 2019 20. Median antenna medium-sized, reaching chaetigers 3–4; posterior region with 4–6 hookless chaetigers; body papillae large in proportion................................................... S. grubii Müller, 1858 – Median antenna short, reaching chaetigers 2–3; posterior region with 2 hookless chaetigers; body papillae small.................................................................... S. hernandezi Salazar-Vallejo et al ., 2019 21. Median antenna slightly longer than laterals; body without a constriction on chaetiger 4; dorsal hooks from chaetigers 30–39 (15–24 mm long); posterior chaetigers without capillary notochaetae.................................................................................................... S. olivai Salazar-Vallejo et al ., 2019 – Median antenna twice as long as laterals; body with a constriction on chaetiger 4; dorsal hooks from chaetiger 30–40 (16–24 mm long); posterior chaetigers with a single capillary notochaetae.......................................................................................................................... S. constricta (Southern, 1921) 22. Pharynx with 8 marginal papillae.................................................................................................... 23 – Pharynx with 14–16 marginal papillae............................................................................................ 25 23. Median antenna slightly longer than lateral ones............................................................................ 24 – Median antenna twice as long as lateral ones; dorsal hooks from chaetigers 26–28........................................................................................................................... S. ligneroi Salazar-Vallejo et al ., 2019 24. Dorsal hooks from chaetiger 4 (0.7 mm wide), tentacular segment as long as wide................................................................................................................................................ S. healyae Gagaev, 2008 – Dorsal hooks from chaetigers 23–30 (45–70 mm long); tentacular segment 4–5 times as wide as long............................................................................................................... S. wassi Pettibone, 1966 25. Dorsal hooks from chaetiger 7, with accessory capillaries; dorsal cirri progressively longer from chaetiger 2............................................................................................... Sigambra sp. Imajima, 2001 – Dorsal hooks from chaetigers 43–70, without capillary chaetae; dorsal cirri of chaetiger 2 smaller than those in following chaetigers............................................................... S. robusta (Ehlers, 1908) 26. Dorsal hooks from chaetiger 6 (1.5 mm long)....................... S. ocellata (Hartmann-Schröder, 1959) – Dorsal hooks from chaetiger 3 (3.7 mm long).................. S. magnuncus (Paterson & Glover, 2000) * As per Salazar-Vallejo et al. (2019), this is not completely identified and based upon some specimens which have not been described yet, but are distinct and deserve to be described. : Published as part of Bhowmik, Moumita, Ghoshal, Priya, Salazar-Vallejo, Sergio I. & Mandal, Sumit, 2021, Sigambra sundarbanensis sp. nov. (Annelida, Pilargidae) from the Indian sector of Sundarbans Estuarine System, with remarks on parapodial glands, pp. 49-66 in European Journal of Taxonomy 744 on pages 60-62, DOI: 10.5852/ejt.2021.744.1301, http://zenodo.org/record/4671462 : {"references": ["Muller F. 1858. Einiges uber die Annelidenfauna der Insel Santa Catharina an der brasilianischen Kuste. Archiv fur Naturgeschichte, Berlin 24: 211 - 220. Available from https: // biodiversitylibrary. org / page / 7460059 [accessed 15 Mar. 2021].", "Salazar-Vallejo S. I., Rizzo A. E., Leon-Gonzalez J. A. & Brauko K. M. 2019. Four new Caribbean Sigambra species (Annelida, Pilargidae), and clarifications of three other Sigambra species. ZooKeys 893: 21 - 50. https: // doi. org / 10.3897 / zookeys. 893.39594", "Muir A. I. & Bamber R. N. 2008. New polychaete (Annelida) records and a new species from Hong Kong: the families Polynoidae, Sigalionidae, Chrysopetalidae, Pilargiidae, Nereididae, Opheliidae, Ampharetidae and Terebellidae. Journal of Natural History 42 (9 - 12): 797 - 814. https: // doi. org / 10.1080 / 00222930701850455", "Licher F. & Westheide W. 1997. Review of the genus Sigambra (Polychaeta: Hesionidae), redescription of S. bassi (Hartman 1947) and descriptions of two new species from Thailand and China. Steenstrupia 23: 1 - 20.", "Fauchald K. 1972. Benthic polychaetous annelids from deep waters off western Mexico and adjacent areas in the Eastern Pacific Ocean. Allan Hancock Monograph in Marine Biology 7: 1 - 575. Available from https: // repository. si. edu / handle / 10088 / 6207 [accessed 15 Mar. 2021].", "Day J. H. 1963. The polychaete fauna of South Africa. 8. New species and records from grab samples and dredgings. Bulletin of the British Museum (Natural History), Zoology 10 (7): 381 - 445. https: // doi. org / 10.5962 / bhl. part. 20530", "Hartman O. 1947. Polychaetous Annelids. Part 8. Pilargidae. Allan Hancock Pacific Expeditions 10: 483 - 523.", "Southern R. 1921. Polychaeta of the Chilka Lake and also of fresh and brackish waters in other parts of India. Memoirs of Indian Museum, Calcutta 5: 563 - 659. Available from https: // biodiversitylibrary. org / page / 36511332 [accessed 15 Mar. 2021].", "Gagaev S. Y. 2008. Sigambra healyae n. sp., a new species of polychaete (Polychaeta: Pilargidae) from the Canadian Basin of the Arctic Ocean. Russian Journal of Marine Biology 34 (1): 73 - 75. https: // doi. org / 10.1134 / S 1063074008010100", "Pettibone M. H. 1966. Revision of the Pilargidae (Annelida: Polychaeta), including descriptions of new species, and redescription of the pelagic Podarmus ploa Chamberlin (Polynoidae). Proceedings of the United States National Museum 118: 155 - 207. https: // doi. org / 10.5479 / si. 00963801.118 - 3525.155", "Paterson G. L. J. & Glover A. G. 2000. A new species of Sigambra (Polychaeta, Pilargidae) from the abyssal plains of the NE Atlantic. Bulletin of the Natural History Museum, London (Zoology) 66: 167 - 170. Available from https: // biodiversitylibrary. org / page / 41005372 [accessed 15 Mar. 2021]."]}