taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
FA57DE61E37325477E860E07994EF8A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235614/files/figure.png	https://doi.org/10.5281/zenodo.7235614	FIGURE 2. Magelona cf. cornuta (NMW.Z.2022.001.0013). A, anterior, dorsal view; B, prostomium, dorsal view; C–L, parapodia of chaetigers 1–9, 12 respectively, anterior views (C, E, H, J–L left hand; D, F, G, I right-hand parapodia); M, thoracic chaeta from chaetiger 7; N, abdominal hooded hook from chaetiger 31, frontal view; O, abdominal hooded hook from chaetiger 31, lateral view. Pr = prostomium, PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, numbers indicate chaetiger.	FIGURE 2. Magelona cf. cornuta (NMW.Z.2022.001.0013). A, anterior, dorsal view; B, prostomium, dorsal view; C–L, parapodia of chaetigers 1–9, 12 respectively, anterior views (C, E, H, J–L left hand; D, F, G, I right-hand parapodia); M, thoracic chaeta from chaetiger 7; N, abdominal hooded hook from chaetiger 31, frontal view; O, abdominal hooded hook from chaetiger 31, lateral view. Pr = prostomium, PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37325477E860E07994EF8A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235616/files/figure.png	https://doi.org/10.5281/zenodo.7235616	FIGURE 3. Magelona cf. cornuta (NMW.Z.2022.001.0013, B, D–G, stained with Methyl Green). A–B, prostomium and first few chaetigers, dorsal view (showing palps and everted burrowing organ); C, anterior, dorsal view (prostomium obscured, burrowing organ clearly visible); D, anterior, lateral view; E, anterior ten chaetigers, burrowing organ and palps, ventral view; F, anterior six chaetigers, ventrolateral view, G, anterior abdominal chaetigers, dorsolateral view. BO = burrowing organ, Pp = palp, PH = prostomial horns, VS = ventral swellings, numbers indicate chaetiger.	FIGURE 3. Magelona cf. cornuta (NMW.Z.2022.001.0013, B, D–G, stained with Methyl Green). A–B, prostomium and first few chaetigers, dorsal view (showing palps and everted burrowing organ); C, anterior, dorsal view (prostomium obscured, burrowing organ clearly visible); D, anterior, lateral view; E, anterior ten chaetigers, burrowing organ and palps, ventral view; F, anterior six chaetigers, ventrolateral view, G, anterior abdominal chaetigers, dorsolateral view. BO = burrowing organ, Pp = palp, PH = prostomial horns, VS = ventral swellings, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37325477E860E07994EF8A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235618/files/figure.png	https://doi.org/10.5281/zenodo.7235618	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37325477E860E07994EF8A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235620/files/figure.png	https://doi.org/10.5281/zenodo.7235620	FIGURE 5. Known distribution records for Magelona crenulifrons, Magelona cornuta and M. cf. cornuta from present study. Record of M. cornuta from Mortimer & Mackie (2009) highlighted separately due to uncertainty of identification.	FIGURE 5. Known distribution records for Magelona crenulifrons, Magelona cornuta and M. cf. cornuta from present study. Record of M. cornuta from Mortimer & Mackie (2009) highlighted separately due to uncertainty of identification.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37325477E860E07994EF8A5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235612/files/figure.png	https://doi.org/10.5281/zenodo.7235612	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37925447E8608F898D5F840.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235622/files/figure.png	https://doi.org/10.5281/zenodo.7235622	FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger.	FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37925447E8608F898D5F840.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235624/files/figure.png	https://doi.org/10.5281/zenodo.7235624	FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger.	FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37925447E8608F898D5F840.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235633/files/figure.png	https://doi.org/10.5281/zenodo.7235633	FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger.	FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37925447E8608F898D5F840.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235635/files/figure.png	https://doi.org/10.5281/zenodo.7235635	FIGURE 9. Known distribution records for Magelona japonica.	FIGURE 9. Known distribution records for Magelona japonica.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37925447E8608F898D5F840.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235612/files/figure.png	https://doi.org/10.5281/zenodo.7235612	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37F255C7E860C0B9EB5FD50.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235618/files/figure.png	https://doi.org/10.5281/zenodo.7235618	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37F255C7E860C0B9EB5FD50.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235637/files/figure.png	https://doi.org/10.5281/zenodo.7235637	FIGURE 10. Magelona alba sp. nov. (NMW.Z.2022.001.0012). A, anterior, dorsal view showing Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 11 respectively, anterior views; M, unilimbate chaeta from chaetiger 6; N, unilimbate chaeta from chaetiger 9, with marginally pennoned tip; O, tridentate abdominal hooded hook from chaetiger 11, oblique lateral view. Pr = prostomium, PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, TP = triangular processes, numbers indicate chaetiger.	FIGURE 10. Magelona alba sp. nov. (NMW.Z.2022.001.0012). A, anterior, dorsal view showing Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 11 respectively, anterior views; M, unilimbate chaeta from chaetiger 6; N, unilimbate chaeta from chaetiger 9, with marginally pennoned tip; O, tridentate abdominal hooded hook from chaetiger 11, oblique lateral view. Pr = prostomium, PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, TP = triangular processes, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37F255C7E860C0B9EB5FD50.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235639/files/figure.png	https://doi.org/10.5281/zenodo.7235639	FIGURE 11. Magelona alba sp. nov. (NMW.Z.2022.001.0012, A–F), Magelona cepiceps Mortimer & Mackie, 2006 (NMW. Z.2000.020.0208, Holotype, G & H). A, prostomium, dorsal view; B, anterior, dorsal view; C, entire specimen, ventral view; D, prostomium and first five chaetigers, ventral view; E, thorax, ventral view; F, chaetigers 4 and 5, ventral view; G–H, entire specimen, dorsal and ventral views respectively. B–D, F–H, stained with Methyl Green.Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, VS = ventral swellings, numbers indicate chaetiger.	FIGURE 11. Magelona alba sp. nov. (NMW.Z.2022.001.0012, A–F), Magelona cepiceps Mortimer & Mackie, 2006 (NMW. Z.2000.020.0208, Holotype, G & H). A, prostomium, dorsal view; B, anterior, dorsal view; C, entire specimen, ventral view; D, prostomium and first five chaetigers, ventral view; E, thorax, ventral view; F, chaetigers 4 and 5, ventral view; G–H, entire specimen, dorsal and ventral views respectively. B–D, F–H, stained with Methyl Green.Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, VS = ventral swellings, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E37F255C7E860C0B9EB5FD50.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235612/files/figure.png	https://doi.org/10.5281/zenodo.7235612	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36325597E860AA69EECF984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235618/files/figure.png	https://doi.org/10.5281/zenodo.7235618	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	FIGURE 4. Tridentate abdominal hooded hooks of Magelona alba sp. nov. (A–B), Magelona cf. cornuta (C–E) and Magelona armatis sp. nov. (F–G). A–C, F & G lateral views; D, frontal view; E, posterolateral view.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36325597E860AA69EECF984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235641/files/figure.png	https://doi.org/10.5281/zenodo.7235641	FIGURE 12. Magelona armatis sp. nov. (NMW.Z.2022.001.0011). A, anterior, dorsal view showing Methyl Green staining pattern; B, prostomium, dorsal view (N.B. lateral edges folded under and distal tip directed upwards as seen in A); C–K, lefthand parapodia from chaetigers 1–9 respectively (anterior views, arrowed figure shows the ventral view of the neuropodial lamellae of chaetigers 2–8 respectively, that of chaetiger 9 anteroventral; L, right-hand parapodium of chaetiger 10, anterior view; M, tridentate abdominal hooded hook from chaetiger 24, lateral view. Pr = prostomium, BO = burrowing organ, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, numbers indicate chaetiger.	FIGURE 12. Magelona armatis sp. nov. (NMW.Z.2022.001.0011). A, anterior, dorsal view showing Methyl Green staining pattern; B, prostomium, dorsal view (N.B. lateral edges folded under and distal tip directed upwards as seen in A); C–K, lefthand parapodia from chaetigers 1–9 respectively (anterior views, arrowed figure shows the ventral view of the neuropodial lamellae of chaetigers 2–8 respectively, that of chaetiger 9 anteroventral; L, right-hand parapodium of chaetiger 10, anterior view; M, tridentate abdominal hooded hook from chaetiger 24, lateral view. Pr = prostomium, BO = burrowing organ, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36325597E860AA69EECF984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235643/files/figure.png	https://doi.org/10.5281/zenodo.7235643	FIGURE 13. Magelona armatis sp. nov. (NMW.Z.2022.001.0011,A, D–G, stained with Methyl Green).A, prostomium and first five chaetigers, dorsolateral view; B, prostomium and first two chaetigers, dorsal view; C, anterior 20 chaetigers, dorsolateral view, retained stain present between chaetigers 4–7; D, anterior, dorsolateral view; E, anterior thirteen chaetigers, ventrolateral view, showing burrowing organ; F, anterior, ventral view showing ventral swellings; G, thoracic-abdominal junction, dorsal view; H, abdominal chaetigers, dorsolateral view. Ab = abdomen, BO = burrowing organ, Pr = prostomium, VS = ventral swellings, Th = thorax, numbers indicate chaetiger.	FIGURE 13. Magelona armatis sp. nov. (NMW.Z.2022.001.0011,A, D–G, stained with Methyl Green).A, prostomium and first five chaetigers, dorsolateral view; B, prostomium and first two chaetigers, dorsal view; C, anterior 20 chaetigers, dorsolateral view, retained stain present between chaetigers 4–7; D, anterior, dorsolateral view; E, anterior thirteen chaetigers, ventrolateral view, showing burrowing organ; F, anterior, ventral view showing ventral swellings; G, thoracic-abdominal junction, dorsal view; H, abdominal chaetigers, dorsolateral view. Ab = abdomen, BO = burrowing organ, Pr = prostomium, VS = ventral swellings, Th = thorax, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36325597E860AA69EECF984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235612/files/figure.png	https://doi.org/10.5281/zenodo.7235612	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36325597E860AA69EECF984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235639/files/figure.png	https://doi.org/10.5281/zenodo.7235639	FIGURE 11. Magelona alba sp. nov. (NMW.Z.2022.001.0012, A–F), Magelona cepiceps Mortimer & Mackie, 2006 (NMW. Z.2000.020.0208, Holotype, G & H). A, prostomium, dorsal view; B, anterior, dorsal view; C, entire specimen, ventral view; D, prostomium and first five chaetigers, ventral view; E, thorax, ventral view; F, chaetigers 4 and 5, ventral view; G–H, entire specimen, dorsal and ventral views respectively. B–D, F–H, stained with Methyl Green.Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, VS = ventral swellings, numbers indicate chaetiger.	FIGURE 11. Magelona alba sp. nov. (NMW.Z.2022.001.0012, A–F), Magelona cepiceps Mortimer & Mackie, 2006 (NMW. Z.2000.020.0208, Holotype, G & H). A, prostomium, dorsal view; B, anterior, dorsal view; C, entire specimen, ventral view; D, prostomium and first five chaetigers, ventral view; E, thorax, ventral view; F, chaetigers 4 and 5, ventral view; G–H, entire specimen, dorsal and ventral views respectively. B–D, F–H, stained with Methyl Green.Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, Noto = notopodia, Neuro = neuropodia, SDL = superior dorsal lobe, VS = ventral swellings, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235646/files/figure.png	https://doi.org/10.5281/zenodo.7235646	FIGURE 14. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratype,A; NMW.Z.2022.001.0007, Paratype, B, M–Q; NMW.Z.2022.001.0002, Holotype, C–L). A, anterior region (prostomium and chaetigers 1–10), dorsal view; B, prostomium, dorsal view; C–L, parapodia of chaetigers 1–10 respectively, anterior views; M, outer capillary notochaetae of chaetiger 9; N, mid-ramus capillary notochaetae of chaetiger 9; O, tridentate abdominal hooded hook, oblique-lateral view; P, tridentate abdominal hooded hook, frontal view; Q, acicular chaeta from chaetiger 11, lateral view.Ac = ‘acicular’ chaeta, BO = burrowing organ, Neuro = neuropodia, Noto = notopodia, PE = postchaetal expansion, Pre = prechaetal, PH = prostomial horns, Post = postchaetal, Pp = palp, SDL = superior dorsal lobe, numbers indicate chaetiger.	FIGURE 14. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratype,A; NMW.Z.2022.001.0007, Paratype, B, M–Q; NMW.Z.2022.001.0002, Holotype, C–L). A, anterior region (prostomium and chaetigers 1–10), dorsal view; B, prostomium, dorsal view; C–L, parapodia of chaetigers 1–10 respectively, anterior views; M, outer capillary notochaetae of chaetiger 9; N, mid-ramus capillary notochaetae of chaetiger 9; O, tridentate abdominal hooded hook, oblique-lateral view; P, tridentate abdominal hooded hook, frontal view; Q, acicular chaeta from chaetiger 11, lateral view.Ac = ‘acicular’ chaeta, BO = burrowing organ, Neuro = neuropodia, Noto = notopodia, PE = postchaetal expansion, Pre = prechaetal, PH = prostomial horns, Post = postchaetal, Pp = palp, SDL = superior dorsal lobe, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235648/files/figure.png	https://doi.org/10.5281/zenodo.7235648	FIGURE 15. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratypes, A, B, D; NMW.Z.2022.001.0005, Paratypes, C, E, F,). B, D, F, stained with Methyl Green.A, anterior region (prostomium and chaetigers 1–9), dorsal view; B, anterior region (prostomium and chaetigers 1–13), dorsal view; C, thorax and anterior abdomen, dorsal view; D, anterior region (prostomium and chaetigers 1–7), ventral view; E, whole specimen, dorsal view; F, thoracic-abdominal junction showing ventral swellings, ventrolateral view. Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, VS = ventral swellings, Th = thorax, numbers indicate chaetiger.	FIGURE 15. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratypes, A, B, D; NMW.Z.2022.001.0005, Paratypes, C, E, F,). B, D, F, stained with Methyl Green.A, anterior region (prostomium and chaetigers 1–9), dorsal view; B, anterior region (prostomium and chaetigers 1–13), dorsal view; C, thorax and anterior abdomen, dorsal view; D, anterior region (prostomium and chaetigers 1–7), ventral view; E, whole specimen, dorsal view; F, thoracic-abdominal junction showing ventral swellings, ventrolateral view. Ab = abdomen, BO = burrowing organ, PH = prostomial horns, Pp = palp, Pr = prostomium, VS = ventral swellings, Th = thorax, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235652/files/figure.png	https://doi.org/10.5281/zenodo.7235652	FIGURE 16. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratypes, A, D, F; NMW.Z.2022.001.0002, Holotype, B, E; NMW.Z.2022.001.0005, Paratypes, C). A–C, E, F, stained with Methyl Green. A, whole specimen, dorsal view; B, anterior region (prostomium and chaetigers 1–13), lateral view; C, anterior, dorsal view; D, whole specimen, ventral view; E, chaetigers 18–23, lateral view (interparapodial patches visible); F, posterior showing pygidium (anal cirri and anus), ventral view. AC = anal cirri, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pr = prostomium, numbers indicate chaetiger.	FIGURE 16. Magelona boninensis sp. nov. (NMW.Z.2022.001.0003, Paratypes, A, D, F; NMW.Z.2022.001.0002, Holotype, B, E; NMW.Z.2022.001.0005, Paratypes, C). A–C, E, F, stained with Methyl Green. A, whole specimen, dorsal view; B, anterior region (prostomium and chaetigers 1–13), lateral view; C, anterior, dorsal view; D, whole specimen, ventral view; E, chaetigers 18–23, lateral view (interparapodial patches visible); F, posterior showing pygidium (anal cirri and anus), ventral view. AC = anal cirri, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pr = prostomium, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235656/files/figure.png	https://doi.org/10.5281/zenodo.7235656	FIGURE 17. SEM images of Magelona boninensis sp. nov. (NMW.Z.2022.001.0008a, Paratypes, A & D; NMW. Z.2022.001.0008b, Paratype, G; NMW.Z.2022.001.0009a, Paratypes, B & C; NMW.Z.2022.001.0009b, Paratypes, E & H; NMW.Z.2022.001.0009c, Paratype, F). A, anterior region (prostomium, palps, and chaetigers 1–5), dorsal view; B, burrowing organ and non-papillated palp region, ventrolateral view; C, proximal and mid-palp region; D, prostomium, dorsal view; E, abdominal lamellae (showing triangular processes, postchaetal expansion, lateral organ, and hooded hooks), posterior view; F, medially split posteriorly open pouch, lateral view; G, tridentate hooks, lateral view (hoods broken by sonication, for clarity); H, abdominal parapodia, ventrolateral view. BO = burrowing organ, LO = lateral organ, PE= postchaetal expansion, PH = prostomial horns, Pp= palp, TP = triangular processes.	FIGURE 17. SEM images of Magelona boninensis sp. nov. (NMW.Z.2022.001.0008a, Paratypes, A & D; NMW. Z.2022.001.0008b, Paratype, G; NMW.Z.2022.001.0009a, Paratypes, B & C; NMW.Z.2022.001.0009b, Paratypes, E & H; NMW.Z.2022.001.0009c, Paratype, F). A, anterior region (prostomium, palps, and chaetigers 1–5), dorsal view; B, burrowing organ and non-papillated palp region, ventrolateral view; C, proximal and mid-palp region; D, prostomium, dorsal view; E, abdominal lamellae (showing triangular processes, postchaetal expansion, lateral organ, and hooded hooks), posterior view; F, medially split posteriorly open pouch, lateral view; G, tridentate hooks, lateral view (hoods broken by sonication, for clarity); H, abdominal parapodia, ventrolateral view. BO = burrowing organ, LO = lateral organ, PE= postchaetal expansion, PH = prostomial horns, Pp= palp, TP = triangular processes.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235658/files/figure.png	https://doi.org/10.5281/zenodo.7235658	FIGURE 18. SEM and images of Magelona boninensis sp. nov. (NMW.Z.2022.001.0008a, Paratypes, A–I; NMW. Z.2022.001.0007, Paratypes, J–O). A–I, parapodia of chaetigers 1–9 respectively (A, B, H, I, left-hand side of body; C–G, righthand side of body). J, prostomium, dorsal view; K, bilimbate capillary chaetae from chaetiger 9; L, tridentate hooded hooks from chaetiger 11 in two groups vis-à-vis, postchaetal expansion visible behind chaetae, anterior view; M, tridentate hooded hook from chaetiger 11, frontal view; N and O, acicular chaetae from chaetiger 11, anterior view. Ac = acicular chaetae, Neuro = neuropodia; Noto = notopodia, PH = prostomial horns, SDL = superior dorsal lobe, numbers indicate chaetiger.	FIGURE 18. SEM and images of Magelona boninensis sp. nov. (NMW.Z.2022.001.0008a, Paratypes, A–I; NMW. Z.2022.001.0007, Paratypes, J–O). A–I, parapodia of chaetigers 1–9 respectively (A, B, H, I, left-hand side of body; C–G, righthand side of body). J, prostomium, dorsal view; K, bilimbate capillary chaetae from chaetiger 9; L, tridentate hooded hooks from chaetiger 11 in two groups vis-à-vis, postchaetal expansion visible behind chaetae, anterior view; M, tridentate hooded hook from chaetiger 11, frontal view; N and O, acicular chaetae from chaetiger 11, anterior view. Ac = acicular chaetae, Neuro = neuropodia; Noto = notopodia, PH = prostomial horns, SDL = superior dorsal lobe, numbers indicate chaetiger.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
FA57DE61E36625517E860EF89C1BFF2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/7235612/files/figure.png	https://doi.org/10.5281/zenodo.7235612	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected.	2022-10-21	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto		Zenodo	biologists	Taylor, Abbie;Mortimer, Kate;Jimi, Naoto			
