taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
366E87EDFF89FFD04743FDC3FA678976.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971918/files/figure.png	https://doi.org/10.5281/zenodo.14971918	Figure 3. Symmetromphalus mithril, representative type specimens. A, holotype, female (MNHN-IM-2019-30328). B, paratype #1, male (SMF 372653). C, paratype #4, female (SMF 372654). D, paratype #5, male (NSMT-Mo 79458). White arrowhead indicates the right cephalic tentacle modified into a penis in males. Scale bars: 1 mm.	Figure 3. Symmetromphalus mithril, representative type specimens. A, holotype, female (MNHN-IM-2019-30328). B, paratype #1, male (SMF 372653). C, paratype #4, female (SMF 372654). D, paratype #5, male (NSMT-Mo 79458). White arrowhead indicates the right cephalic tentacle modified into a penis in males. Scale bars: 1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF89FFD04743FDC3FA678976.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971920/files/figure.png	https://doi.org/10.5281/zenodo.14971920	Figure 4. Symmetromphalus mithril, scanning electron micrographs.A, a juvenile shell showing the protoconch and early teleoconch whorls. B, protoconch. C, cross-section of a piece of fractured shell showing the shell microstructure, white arrowheads indicate shell pores. D, close-up of the complex crossed lamellar layer showing the shell pores. E, operculum of an adult individual. F, a section of the middle part of a radula ribbon showing the overview. G, close-up of the rachidian and lateral teeth. Scale bars: A, 500 μm; B, C, 100 μm; D, 50 μm; E, 250 μm; F, G, 50 μm.	Figure 4. Symmetromphalus mithril, scanning electron micrographs.A, a juvenile shell showing the protoconch and early teleoconch whorls. B, protoconch. C, cross-section of a piece of fractured shell showing the shell microstructure, white arrowheads indicate shell pores. D, close-up of the complex crossed lamellar layer showing the shell pores. E, operculum of an adult individual. F, a section of the middle part of a radula ribbon showing the overview. G, close-up of the rachidian and lateral teeth. Scale bars: A, 500 μm; B, C, 100 μm; D, 50 μm; E, 250 μm; F, G, 50 μm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF89FFD04743FDC3FA678976.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971924/files/figure.png	https://doi.org/10.5281/zenodo.14971924	Figure 5. Symmetromphalus mithril, external anatomy. A, paratype #1, male (SMF 372653).B, paratype #2, female (NSMT-Mo 79457). Abbreviations:et, epipodial tentacle; f, foot; g, ctenidium (gill); me, mantle edge; od, oviduct; ol, oral lappet; op, operculum; ov, ovary; pc, pericardium; pe, penis; pg, prostate gland; re, rectum; sm, shell muscle; t, cephalic tentacle; te, testis. Scale bars:1 mm.	Figure 5. Symmetromphalus mithril, external anatomy. A, paratype #1, male (SMF 372653).B, paratype #2, female (NSMT-Mo 79457). Abbreviations:et, epipodial tentacle; f, foot; g, ctenidium (gill); me, mantle edge; od, oviduct; ol, oral lappet; op, operculum; ov, ovary; pc, pericardium; pe, penis; pg, prostate gland; re, rectum; sm, shell muscle; t, cephalic tentacle; te, testis. Scale bars:1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF89FFD04743FDC3FA678976.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971915/files/figure.png	https://doi.org/10.5281/zenodo.14971915	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF85FFD44596FE1BFB098990.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971928/files/figure.png	https://doi.org/10.5281/zenodo.14971928	Figure 6. Symmetriapelta becki, representative specimens.A, holotype (MNHN-IM-2019-30332). B, paratype #1 (SMF 372657). C, paratype #3 (MNHN-IM-2019-30333). D, paratype #6 (NSMT-Mo 79462). E, a specimen from Niuatahi Seamount, Tonga-Tofua Arc (SIO-BIC M19504). F, specimen with a curved shell from Kulo Lasi, Futuna Arc (MNHN-IM-2019-30336).G, specimen with an intermediate shell form from Kulo Lasi, Futuna Arc (MNHN-IM-2019-30337).Scale bars: 1 mm.	Figure 6. Symmetriapelta becki, representative specimens.A, holotype (MNHN-IM-2019-30332). B, paratype #1 (SMF 372657). C, paratype #3 (MNHN-IM-2019-30333). D, paratype #6 (NSMT-Mo 79462). E, a specimen from Niuatahi Seamount, Tonga-Tofua Arc (SIO-BIC M19504). F, specimen with a curved shell from Kulo Lasi, Futuna Arc (MNHN-IM-2019-30336).G, specimen with an intermediate shell form from Kulo Lasi, Futuna Arc (MNHN-IM-2019-30337).Scale bars: 1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF85FFD44596FE1BFB098990.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971932/files/figure.png	https://doi.org/10.5281/zenodo.14971932	Figure 7. Symmetriapelta species, scanning electron micrographs. A, protoconch of Symmetriapelta becki, dorsal view.B, protoconch of Symmetriapelta becki, lateral view. C, protoconch of Symmetriapelta wareni, dorsal view. D, shell microstructure of Symmetriapelta becki. E, shell microstructure of Symmetriapelta wareni. F, a section of the radula ribbon of Symmetriapelta becki. G, close-up of rachidian and lateral teeth of Symmetriapelta becki. White arrows indicate shell pores. Scale bars: A–C, 100 μm; D, E, 50 μm; F, 100 μm; G, 50 μm.	Figure 7. Symmetriapelta species, scanning electron micrographs. A, protoconch of Symmetriapelta becki, dorsal view.B, protoconch of Symmetriapelta becki, lateral view. C, protoconch of Symmetriapelta wareni, dorsal view. D, shell microstructure of Symmetriapelta becki. E, shell microstructure of Symmetriapelta wareni. F, a section of the radula ribbon of Symmetriapelta becki. G, close-up of rachidian and lateral teeth of Symmetriapelta becki. White arrows indicate shell pores. Scale bars: A–C, 100 μm; D, E, 50 μm; F, 100 μm; G, 50 μm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF85FFD44596FE1BFB098990.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971936/files/figure.png	https://doi.org/10.5281/zenodo.14971936	Figure 8. Symmetriapelta becki, external anatomy of paratype #1 (SMF 372657). Abbreviations:dg, digestive gland; et, epipodial tentacle; f, foot; g, ctenidium (gill); go, gonad; me, mantle edge; pc, pericardium; re, rectum; sm, shell muscle; t, cephalic tentacle. Scale bar: 1 mm.	Figure 8. Symmetriapelta becki, external anatomy of paratype #1 (SMF 372657). Abbreviations:dg, digestive gland; et, epipodial tentacle; f, foot; g, ctenidium (gill); go, gonad; me, mantle edge; pc, pericardium; re, rectum; sm, shell muscle; t, cephalic tentacle. Scale bar: 1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF85FFD44596FE1BFB098990.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971915/files/figure.png	https://doi.org/10.5281/zenodo.14971915	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF81FFD64589FE5FFDF68F7D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971938/files/figure.png	https://doi.org/10.5281/zenodo.14971938	Figure 9. Symmetriapelta radiata, representative type specimens. A, holotype (MNHN-IM-2019-30341). B, paratype #1 (SMF 372662).C, paratype #2 (NSMT-Mo 79465). D, paratype #3 (MNHN-IM-2019-30342). Scale bars: 1 mm.	Figure 9. Symmetriapelta radiata, representative type specimens. A, holotype (MNHN-IM-2019-30341). B, paratype #1 (SMF 372662).C, paratype #2 (NSMT-Mo 79465). D, paratype #3 (MNHN-IM-2019-30342). Scale bars: 1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF81FFD64589FE5FFDF68F7D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971944/files/figure.png	https://doi.org/10.5281/zenodo.14971944	Figure 10. Symmetriapelta radiata, scanning electron micrographs.A, protoconch.B, cross-section of a piece of fractured shell showing the shell microstructure.White arrows indicate shell pores. C, radula, showing close-up of rachidian and lateral teeth. D, a section of the radula around the middle of the ribbon showing the overall morphology. Scale bars:A, B, 100 μm; C, 20 μm; D, 50 μm.	Figure 10. Symmetriapelta radiata, scanning electron micrographs.A, protoconch.B, cross-section of a piece of fractured shell showing the shell microstructure.White arrows indicate shell pores. C, radula, showing close-up of rachidian and lateral teeth. D, a section of the radula around the middle of the ribbon showing the overall morphology. Scale bars:A, B, 100 μm; C, 20 μm; D, 50 μm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF81FFD64589FE5FFDF68F7D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971948/files/figure.png	https://doi.org/10.5281/zenodo.14971948	Figure 11. Symmetriapelta radiata, external anatomy of paratype #1 (SSMF 372662). Abbreviations: dg, digestive gland; et, epipodial tentacle; f, foot; g, ctenidium (gill); go, gonad; me, mantle edge; pc, pericardium; re, rectum; sm, shell muscle; t, cephalic tentacle.Scale bar: 1 mm.	Figure 11. Symmetriapelta radiata, external anatomy of paratype #1 (SSMF 372662). Abbreviations: dg, digestive gland; et, epipodial tentacle; f, foot; g, ctenidium (gill); go, gonad; me, mantle edge; pc, pericardium; re, rectum; sm, shell muscle; t, cephalic tentacle.Scale bar: 1 mm.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
366E87EDFF81FFD64589FE5FFDF68F7D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/14971915/files/figure.png	https://doi.org/10.5281/zenodo.14971915	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	Figure 2. In situ photographs showing habitats of the new neomphaloidean gastropods.A, Ifemeria nautilei snail assemblage at La Scala hydrothermal vent field, Woodlark Basin (9°47.944ʹS, 155°03.161ʹʹE, 3388 m deep). B, siboglinid tubeworm bushes at Kulo Lasi hydrothermal vent field, Futuna Arc (14°56.538ʹS, 177°15.007ʹW, 1414 m deep). C, Alviniconcha snail assemblages at Mangatolo hydrothermal vent field, northern Lau Basin (15°24.876ʹS, 174°39.208ʹW, 2031 m deep).Photo credit:Ifremer / CHUBACARC2019.	2024-05-23	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine		Zenodo	biologists	Chen, Chong;Poitrimol, Camille;Matabos, Marjolaine			
