Oligobregma Kudenov & Blake 1978
- 1. slucasmendes 013 @ gmail. com
- 2. paulopaiva @ gmail. com
- 3. Universidade Federal do Rio de Janeiro, Programa de Pós-Graduação em Zoologia, Museu Nacional.
Description
Key to species of Oligobregma Kudenov & Blake, 1978
1. Acicular spines present on chaetigers 1–2................................................................ 2
- Acicular spines present on chaetigers 1–3 or 1–4.......................................................... 4
2(1). Acicular spines in both rami........................................................................... 3
- Acicular spines only in notopodia................. O. pseudocollare Schüller & Hilbig 2007 (Scotia and Weddel Seas)
3(2). Eyes present, fused into a single shield-shape patch; Prostomial horns digitate........................................................................................... O. oculata Kudenov & Blake, 1978 (New Caledonia)
- Eyes absent; Prostomial horns rounded.............................. O. aciculata (Hartman, 1965) (North Atlantic)
4(1). Acicular spines present on chaetiger 1–3................................................................. 5
- Acicular spines present on chaetiger 1–4................................................................ 11
5(4). Acicular spines only in notopodia...................................................................... 6
- Acicular spines in both rami........................................................................... 7
6(5). Two short rounded prostomial horns, directed forwardly; eyes absent.............................................................................................. O. collare (Levenstein, 1975) (Southern Ocean, Antarctica)
- Two long rounded prostomial horns, directed laterally; eyes present.................................................................................................... O. notiale Blake, 1981 (Southern Ocean, Antarctica)
7(5). Lyrate chaetae from chaetiger 4........................................................................ 8
- Lyrate chaetae from chaetiger 5–6...................................................................... 9
8(7). Neuropodia with a single row of acicular spines on chaetiger 1–3; lyrate chaetae with equal tynes....................................................................................... O. mucronata Blake, 2015 (Antarctica)
- Neuropodia with two rows of acicular spines on chaetiger 1–2; lyrate chaetae with subequal tynes................................................................................ O. tasmania (Kierkegaard, 1996) (Tasman Sea)
9(7). Acicular spines with terminal arista; parapodial cirri inflated or asymmetrical, with nipple-like tips..................................................................... O. aristata Blake, 2023 (Australia, lower continental slope)
- Acicular spines lacking terminal arista; parapodial cirri triangular, with rounded or pointed tips.................... 10
10(9). Parapodial cirri with narrow rounded tip; ventrally, prominent darkly pigmented pairs of nephridia absent.......................................................... O. profunda Blake, 2023 (Australia, Tasmania to New South Wales)
- Parapodial cirri with pointed tip; ventrally, prominent darkly pigmented pairs of nephridia present............................................................................... O. renuncula Blake, 2023 (Australia, Coral Sea)
11(4). Acicular spines only in notopodia..................................................................... 12
- Acicular spines present in both rami................................................................... 13
12(11). Prostomium with two rounded horns directed upwards; acicular spines transitional in chaetiger 4, weaker and similar to capillaries.................................. O. tani Wiklund et al. 2019 (Clarion-Clipperton Zone, Pacific Ocean)
- Prostomium with two elongated horns directed laterally; acicular spines strong in chaetiger 4, not transitional to capillaries............................................ O. quadrispinosa Schüller & Hilbig, 2007 (Scotia and Weddel Sea)
13(11). Acicular spines with pointed tips...................................................................... 14
- Acicular spines with curved rounded tips................... O. bakkeni sp. nov. (Espírito Santo Basin, South Atlantic)
14(13). Lyrate chaetae present from chaetiger 3 on neuropodia................................................................................................. O. nonatoi sp. nov. (Santos and Espírito Santo basins, South Atlantic)
- Lyrate chaetae present from chaetiger 4–11 on neuropodia.................................................. 15
15(14). Lyrate chaetae from chaetiger 4–6..................................................................... 16
- Lyrate chaetae from chaetiger 11............. O. whaleyi Wiklund et al., 2019 (Clarion-Clipperton Zone, Pacific Ocean)
16(15). Lyrate chaetae from chaetiger 4–5..................................................................... 17
- Lyrate chaetae from chaetiger 6..................... O. simplex Kudenov & Blake, 1978 (Westernport Bay, Australia)
17(16). Acicular spines present in neuropodia of chaetiger 4....................................................... 18
- Acicular spines absent in neuropodia of chaetiger 4.............. O. bathyala, 2023 (Australia lower continental slope)
18(17). Proboscis present as a soft, smooth sac-like structure; parapodial cirri conical; parapodial cirri glands with gold coloration, organized in patches within parapodial cirri..................................................................................................... O. brasierae Wiklund et al., 2019 (Clarion-Clipperton Zone, Pacific Ocean)
- Proboscis present as a strong crenulated structure; parapodial cirri triangular to lanceolate; parapodial cirri glands long and tubular, blackish, entangled in posterior chaetigers, always extending towards cirri’s tip....................................................................................... O. cruzae sp. nov. (Santos Basin, South Atlantic)
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Scalibregmatidae
- Genus
- Oligobregma
- Kingdom
- Animalia
- Phylum
- Annelida
- Scientific name authorship
- Kudenov & Blake
- Taxon rank
- genus
- Taxonomic concept label
- Oligobregma Kudenov, 1978 sec. Mendes, Paiva & Rizzo, 2024
References
- Kudenov, J. D. & Blake, J. A. (1978) A review of the genera and species of the Scalibregmidae (Polychaeta) with descriptions of one new genus and three new species from Australia. Journal of Natural History, 12, 427 - 444. https: // doi. org / 10.1080 / 00222937800770291
- Schuller, M. & Hilbig, B. (2007) Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica). Zootaxa, 1391, 35 - 45. https: // doi. org / 10.11646 / zootaxa. 1391.1.2
- Hartman, O. (1965) Deep-water benthic polychaetous annelids off New England to Bermuda and other North Atlantic areas. Allan Hancock Foundation Publications, Occasional Paper, 28, 1 - 378.
- Levenstein, R. Y. (1975) The polychaetous annelids of the deep-sea trenches of the Atlantic sector of the Antarctic Ocean. Transactions of the P. P. Shirov Institute of Oceanology Academy. Trudy Instituta Okeanologia, Akademia nauk SSSR, 103, 119 - 142.
- Blake, J. A. (1981) The Scalibregmatidae (Annelida: Polychaeta) from South American and Antarctic Seas, collected chiefly during the cruises of the R / V Anton Bruun, R / V Hero and USNS Eltanin. Proceedings of the Biological Society of Washington, 94, 1131 - 1162.
- Blake, J. A. (2015) New species of Scalibregmatidae (Annelida, Polychaeta) from the East Antarctic Peninsula including a description of the ecology and post-larval development of species of Scalibregma and Oligobregma. Zootaxa, 4033 (1), 57 - 93. https: // doi. org / 10.11646 / zootaxa. 4033.1.3
- Kierkegaard, J. B. (1996) Bathyal and abyssal polychaetes (Sedentary Species I). Galathea Report, 17, 57 - 77.
- Blake, J. A. (2023) New species of Scalibregmatidae (Annelida) from slope and abyssal depths off eastern Australia. Records of the Australian Museum, 75 (3), 271 - 298. https: // doi. org / 10.3853 / j. 2201 - 4349.75.2023.1827
- Wiklund, H., Neal, l., Glover, A. G., Drennan, R., Rabone, M. & Dahlgren, T. G. (2019) Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae. Zookeys, 883, 1 - 82. https: // doi. org / 10.3897 / zookeys. 883.36193