Oligobregma Kudenov & Blake 1978

• Main Authors: Mendes, Samuel Lucas Da Silva Delgado, Paiva, Paulo Cesar De, Rizzo, Alexandra E.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2024
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Scalibregmatidae; Oligobregma; Southern Ocean; Antarc*; Antarctica; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.10815162; http://treatment.plazi.org/id/03B887F73E0B6F7BF884B3F706D2FCF8

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 ...