Published May 17, 2023
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Table 2 in New Species of Scalibregmatidae (Annelida) from Slope and Abyssal Depths off Eastern Australia
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Description
Table 2. Morphological comparison of 17 known species of Oligobregma. Abbreviations: Ant, anterior; Atl, Atlantic; CCZ, Clarion-Clipperton Zone; intPap, interramal papilla; N, north; NeuroC, neuropodial cirri; NotoP, notopodia; NotoC, notopodial cirri; NeuroP, neuropodia; NW, northwest; Pap, papilla; Post, posterior, S, south; SE, southeastern; Set, setiger; W, western.
| species | anterior setigers with acicular spines | prostomium | first furcate | segmental annulation patterns | posterior parapodia | pygidium | distribution & references |
|---|---|---|---|---|---|---|---|
| setae | |||||||
| species with acicular spines on setigers 1–2 | |||||||
| O. aciculata (Hartman, 1965) | Both rami; spines hirsute | 2 short rounded frontal | ?Set 3 | Not reported | NotoC short, rounded; NeuroC, | Unknown | W North Atl, abyssal, 4850 m; |
| lobes | triangular, pointed; with | Hartman, 1965 | |||||
| interramal Pap | |||||||
| O. oculata Kudenov & Blake, | Both rami | T-shaped, with digitiform | Set 3 | Set 1 smooth; Set 2 | NotoC narrow, as long as wide; | “At least” 2 | S of New Caledonia, 57 m; |
| 1978 | lateral lobes | biannulate; Set 3 | NeuroC digitate, 3 times as long | anal cirri | Kudenov & Blake, 1978 | ||
| triannulate; rest with | as wide; large intPap | ||||||
| 4 or 5 annulations | |||||||
| O. pseudocollare Schüller & | NotoP only | With 2 laterally directed | Set 3 | Set 1–3 smooth; Set 4–9 tri- | Short conical dorsal and ventral | No cirri | Southern Ocean; Scotia and |
| Hilbig, 2007 | rounded lobes | to quadriannulate, | cirri | observed | Weddell Seas, 753–3050 m; | ||
| thereafter with 5 | Schüller & Hilbig, 2007 | ||||||
| annulations | |||||||
| species with acicular spines on setigers 1–3 | |||||||
| O. aristata sp. nov. | Both rami; spines with | 2 short forwardly directed | Set 5–6 | Set 1 a single large medial | NotoC large, inflated, with | Unknown | Off Australia lower |
| terminal arista | lobes; these notched in | pad; set 2 uniannulate; set | nipple-like tip directed dorally; | continental slope and | |||
| holotype | 3–4 triannulate; set 5–10 | NeuroC asymmetrical, nipple- | abyssal depths, 2793–4031 | ||||
| inflated, obscured; set | like tip directed laterally | m; This study | |||||
| 11–22 tri- to quadriannulate | |||||||
| O. collare (Levenstein, 1975) | NotoP only; spines hirsute | 2 short forwardly directed | Set 4 | Set 1–2 smooth; set 3 to | NotoC short, bluntly triangular; | Up to 8 cirri | Southern Ocean, Antarctica, |
| rounded lobes | mid- body triannulate; post | NeuroC short, conical; with | 1622–6070 m; Levenstein, | ||||
| set quadriannulate | interramal Pap | 1975; Blake, 1981 | |||||
| O. mucronata Blake, 2015 | Both rami; spines w/ | 2 short, forwardly directed | Set 4 | Set 1–2 uniannulate; set 3, | NotoC large, triangular, NeuroC | 4 anal cirri | East Antarctic Peninsula, |
| terminal arista | rounded lobes | biannulate; set 4 and | large, triangular, with broad | 323–912 m; Blake, 2015 | |||
| following quadriannulate | base; with interramal Pap | ||||||
| O. notiale Blake, 1981 | NotoP only | 2 enlarged, diverging lateral | Set 4 | Set 1 smooth to irregular; | NotoC large inflated lobe; | 5 ventral cirri | Southern Ocean, Antarctica, |
| lobes | rest quadriannulate | NeuroC small, conical lobe; | 18–923 m; Blake, 1981 | ||||
| with large interramal Pap | |||||||
| O. profunda sp. nov. | Both rami of first row; rarely | 2 short rounded lobes, | Set 5–6 | Set 1–3 smooth; set 4–end | NotoC and NeuroC erect; | 4 anal cirri | Off eastern Australia, |
| in second row of set 1; | subapical | tri- to quadriannulate | triangular with pointed tips | Tasmania to New South | |||
| NeuroP of set 1‒2, rarely 3; | Wales, 3881‒4176 m. This | ||||||
| first row only. | study. | ||||||
Notes
Published as part of Blake, James A., 2023, New Species of Scalibregmatidae (Annelida) from Slope and Abyssal Depths off Eastern Australia, pp. 280 in Records of the Australian Museum (Rec. Aust. Mus.) 75 (3) on page 280, DOI: 10.3853/j.2201-4349.75.2023.1827, http://zenodo.org/record/10414024
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Additional details
Identifiers
References
- 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.
- Kudenov, J. D., and J. A. Blake. 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.
- Schuller, M., and B. Hilbig. 2007. Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica). Zootaxa 1391: 35 - 45
- 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.