taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
081987A1A218BB56FF5DDA84FE49891A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/181997/files/figure.png	https://doi.org/10.5281/zenodo.181997	FIGURES 1 – 2. Dilemma frumarkernorum. 1. Major muscle scars and anteroposterior shell axis. Axis defined by a line joining median points of the anterior and posterior adductors scars projected onto the sagittal shell plane (Allen, 1985). 2. Dimensional orientations. Abbreviations: AAS = scar of anterior adductor muscle; ABS = Anterior byssal retractor muscle scar seen by transparency, situated in umbonal cavity; APA = anteroposterior axis; H = height; L = length; LI = ligament; PAS = scar of posterior adductor muscle; PBS = scar of posterior byssal retractor muscle; W = width.	FIGURES 1 – 2. Dilemma frumarkernorum. 1. Major muscle scars and anteroposterior shell axis. Axis defined by a line joining median points of the anterior and posterior adductors scars projected onto the sagittal shell plane (Allen, 1985). 2. Dimensional orientations. Abbreviations: AAS = scar of anterior adductor muscle; ABS = Anterior byssal retractor muscle scar seen by transparency, situated in umbonal cavity; APA = anteroposterior axis; H = height; L = length; LI = ligament; PAS = scar of posterior adductor muscle; PBS = scar of posterior byssal retractor muscle; W = width.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A218BB56FF5DDA84FE49891A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/181998/files/figure.png	https://doi.org/10.5281/zenodo.181998	FIGURES 3 – 24. Dilemma frumarkernorum. Views of shells. 3 – 8. Holotype, BMSM 15029. 3 – 5. Right valve. 3. Posterior. 4. Ve n tr a l. 5. Lateral (internal). 6 – 8. Left valve. 6. Anterior. 7. Dorsal. 8. Lateral. 9 – 14. Paratype 2, UF 416419. 9 – 11. Right valve. 9. Posterior. 10. Ventral. 11. Lateral (internal). 12 – 14. Left valve. 12. Anterior. 13. Dorsal. 14. Lateral. 15 – 20. Paratype 1, USNM 1112670. 15 – 17. Right valve. 9. Posterior. 10. Ventral. 11. Lateral (internal). 18 – 20. Left valve. 18. Anterior. 19. Dorsal. 20. Lateral. 21 – 24. Paratype 4, Frank Frumar Collection, complete shell, partially open. 21. Ventral. 22. Dorsal. 23. Posterior. 24. Anterior. Scale bar (all images at same scale) = 10 mm.	FIGURES 3 – 24. Dilemma frumarkernorum. Views of shells. 3 – 8. Holotype, BMSM 15029. 3 – 5. Right valve. 3. Posterior. 4. Ve n tr a l. 5. Lateral (internal). 6 – 8. Left valve. 6. Anterior. 7. Dorsal. 8. Lateral. 9 – 14. Paratype 2, UF 416419. 9 – 11. Right valve. 9. Posterior. 10. Ventral. 11. Lateral (internal). 12 – 14. Left valve. 12. Anterior. 13. Dorsal. 14. Lateral. 15 – 20. Paratype 1, USNM 1112670. 15 – 17. Right valve. 9. Posterior. 10. Ventral. 11. Lateral (internal). 18 – 20. Left valve. 18. Anterior. 19. Dorsal. 20. Lateral. 21 – 24. Paratype 4, Frank Frumar Collection, complete shell, partially open. 21. Ventral. 22. Dorsal. 23. Posterior. 24. Anterior. Scale bar (all images at same scale) = 10 mm.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A218BB56FF5DDA84FE49891A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/181999/files/figure.png	https://doi.org/10.5281/zenodo.181999	FIGURES 25 – 29. Dilemma frumarkernorum. Shell hinge and ligament. 25 – 28. Paratype 2. 25. Internal views of shell, SEM. Left valve on left side. 26. Hinge in posteroventral view, SEM. 27. Same view, optical photography. 28. Detail of right valve showing ligament. 29. Paratype 1. Attached valves in ventro-lateral view showing hinge with interlocking teeth and sockets. Scale bars: Figures 25 – 27, 29 = 2 mm; Figure 28 = 1 mm.	FIGURES 25 – 29. Dilemma frumarkernorum. Shell hinge and ligament. 25 – 28. Paratype 2. 25. Internal views of shell, SEM. Left valve on left side. 26. Hinge in posteroventral view, SEM. 27. Same view, optical photography. 28. Detail of right valve showing ligament. 29. Paratype 1. Attached valves in ventro-lateral view showing hinge with interlocking teeth and sockets. Scale bars: Figures 25 – 27, 29 = 2 mm; Figure 28 = 1 mm.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A218BB56FF5DDA84FE49891A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182000/files/figure.png	https://doi.org/10.5281/zenodo.182000	FIGURES 30 – 33. Dilemma frumarkernorum. 30 – 32. Paratype 1. 30. Posterior, 31. anterior, and 32. right lateral views of animal removed from shell and submerged in fixative. Mantle lobes are intact in all three views. 33. Paratype 2. Animal in shell showing relaxed excurrent siphonal opening. Abbreviations: AA = anterior adductor muscle; BGA = byssal gape; BY = byssus; DD = digestive diverticula; ES = excurrent siphonal opening; F = foot; FM = fused mantle margin; IS = incurrent siphonal opening; ISC = infraseptal chamber; K = kidney; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; TN = tentacles (on siphonal area); TE = testis; UT = unpaired tentacle. Scale bar: Figures 30 – 32 = 5 mm.	FIGURES 30 – 33. Dilemma frumarkernorum. 30 – 32. Paratype 1. 30. Posterior, 31. anterior, and 32. right lateral views of animal removed from shell and submerged in fixative. Mantle lobes are intact in all three views. 33. Paratype 2. Animal in shell showing relaxed excurrent siphonal opening. Abbreviations: AA = anterior adductor muscle; BGA = byssal gape; BY = byssus; DD = digestive diverticula; ES = excurrent siphonal opening; F = foot; FM = fused mantle margin; IS = incurrent siphonal opening; ISC = infraseptal chamber; K = kidney; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; TN = tentacles (on siphonal area); TE = testis; UT = unpaired tentacle. Scale bar: Figures 30 – 32 = 5 mm.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A218BB56FF5DDA84FE49891A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182003/files/figure.png	https://doi.org/10.5281/zenodo.182003	FIGURES 54 – 58. Dilemma species, reconstructed macroanatomy. 54 – 57. Dilemma spectralis. 54. Left lateral view with part of mantle wall removed. 55. Detail of mantle cavity in left lateral view showing pair of internal tentacles along posterior edge of excurrent siphon. 56. Detail of mouth region showing labial palps. 57. Posterior region showing siphonal opening, tentacles, and stomach with prey item (a cirolanid isopod.). 58. Comparison of septal ostia in D. frumarkernorum (left) and D. spectralis (right). Posterior view, only left half of septum shown, with dorsal at top and not to scale. Scale bars: Figure 54 = 3 mm, Figure 55 = 2 mm, Figure 56 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BO = byssal opening; BY = byssus; DD = digestive diverticula; ES = excurrent siphon; IS = incurrent siphonal opening; ISC = infraseptal chamber; IST = prey item in stomach (a cirolanid isopod); IT = internal tentacles; ITN = tentacles deployed ventrally to incurrent siphon; JTN = tentacles deployed alongside intersiphonal junction; K = kidney; MG = midgut; MO = mouth; MSO = median group of septal ostia; OE = esophagus; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PLP = posterior labial palps; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; UT = unpaired tentacle.	FIGURES 54 – 58. Dilemma species, reconstructed macroanatomy. 54 – 57. Dilemma spectralis. 54. Left lateral view with part of mantle wall removed. 55. Detail of mantle cavity in left lateral view showing pair of internal tentacles along posterior edge of excurrent siphon. 56. Detail of mouth region showing labial palps. 57. Posterior region showing siphonal opening, tentacles, and stomach with prey item (a cirolanid isopod.). 58. Comparison of septal ostia in D. frumarkernorum (left) and D. spectralis (right). Posterior view, only left half of septum shown, with dorsal at top and not to scale. Scale bars: Figure 54 = 3 mm, Figure 55 = 2 mm, Figure 56 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BO = byssal opening; BY = byssus; DD = digestive diverticula; ES = excurrent siphon; IS = incurrent siphonal opening; ISC = infraseptal chamber; IST = prey item in stomach (a cirolanid isopod); IT = internal tentacles; ITN = tentacles deployed ventrally to incurrent siphon; JTN = tentacles deployed alongside intersiphonal junction; K = kidney; MG = midgut; MO = mouth; MSO = median group of septal ostia; OE = esophagus; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PLP = posterior labial palps; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; UT = unpaired tentacle.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A214BB5AFF5DDC6BFF3E8A97.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182001/files/figure.png	https://doi.org/10.5281/zenodo.182001	FIGURES 34 – 45. Dilemma species. 34 – 40. Dilemma spectralis. Holotype, MNHN 20818, whole specimen and shell views. 34 – 35. Whole specimen. 34. Posterior. 35. Anterior. Left valve is broken adjacent to byssal gape. 36. Right and left valves, lateral. 37. Ligament in posterodorsal view. 38. Detail of posteroventral shell surface showing periostracum with spicules. 39. Detail of anteroventral shell surface showing periostracum with worn spicules. 40. Right valve, ventral view of internal surface showing hinge. Scale bars: Figures 34 – 36 = 5 mm; Figures 37 – 40 = 1 mm. 41 – 45. Dilemma inexpectatum (Crozier, 1966). Holotype, NMNZ M. 018488, left valve. 41 – 44. Valve views, from left to right: posterior, internal lateral, anterior, external lateral. 45. Detail showing cardinal-like tooth. Scale bars: Figures 41 – 44 = 5 mm; Figure 45 = 1 mm. Abbreviations: AAS = scar of anterior adductor muscle; BG = byssal gap; BGA = byssal gape (in mantle of broken shell); CT = cardinal-like tooth; ES = escutcheon; HS = hinge socket; IL = inner ligament layer; OL = outer ligament layer; SM = shell margin. Figures 41? 44 courtesy Bruce Marshall, copyright Museum of New Zealand Te Papa Tongarewa.	FIGURES 34 – 45. Dilemma species. 34 – 40. Dilemma spectralis. Holotype, MNHN 20818, whole specimen and shell views. 34 – 35. Whole specimen. 34. Posterior. 35. Anterior. Left valve is broken adjacent to byssal gape. 36. Right and left valves, lateral. 37. Ligament in posterodorsal view. 38. Detail of posteroventral shell surface showing periostracum with spicules. 39. Detail of anteroventral shell surface showing periostracum with worn spicules. 40. Right valve, ventral view of internal surface showing hinge. Scale bars: Figures 34 – 36 = 5 mm; Figures 37 – 40 = 1 mm. 41 – 45. Dilemma inexpectatum (Crozier, 1966). Holotype, NMNZ M. 018488, left valve. 41 – 44. Valve views, from left to right: posterior, internal lateral, anterior, external lateral. 45. Detail showing cardinal-like tooth. Scale bars: Figures 41 – 44 = 5 mm; Figure 45 = 1 mm. Abbreviations: AAS = scar of anterior adductor muscle; BG = byssal gap; BGA = byssal gape (in mantle of broken shell); CT = cardinal-like tooth; ES = escutcheon; HS = hinge socket; IL = inner ligament layer; OL = outer ligament layer; SM = shell margin. Figures 41? 44 courtesy Bruce Marshall, copyright Museum of New Zealand Te Papa Tongarewa.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A214BB5AFF5DDC6BFF3E8A97.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182002/files/figure.png	https://doi.org/10.5281/zenodo.182002	FIGURES 46 – 53. Dilemma spectralis. Holotype, gross anatomy, major organs and anatomical structures. 46. Posterior view. 47. Anterior view with anterior mantle wall removed. 48 – 49. Left lateral views. 48. With part of mantle wall removed. 49. Tilted 30 º to allow viewing of fused mantle margins and some septal ostia. 50. Right lateral view with part of mantle wall removed. 51. Detail of right side of supraseptal chamber showing internal tentacles anterior to excurrent siphons. 52. Detail of right side of septum around byssal opening showing three groups of septal ostia. 53. Detail of mouth area showing labial palps. Note small posterior labial palps and position of foot extremity in relation to mouth. Scale bars: Figure 46 = 3 mm; Figures 51, 52 = 2 mm; Figure 53 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BGA = byssal gape; BY = byssus; DD = digestive diverticula; ES = excurrent siphonal opening; F = foot; FM = fused mantle margin; IS = incurrent siphonal opening; ISC = infraseptal chamber; IT = internal tentacles; K = kidney; MO = mouth; MSO = median group of septal ostia; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PE = periostracum; PLP = posterior labial palps; PSM = posterior septal muscle; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach (engorged by content, see Figure 57); UT = unpaired tentacle; TE = testis; TN = tentacles (on siphonal area).	FIGURES 46 – 53. Dilemma spectralis. Holotype, gross anatomy, major organs and anatomical structures. 46. Posterior view. 47. Anterior view with anterior mantle wall removed. 48 – 49. Left lateral views. 48. With part of mantle wall removed. 49. Tilted 30 º to allow viewing of fused mantle margins and some septal ostia. 50. Right lateral view with part of mantle wall removed. 51. Detail of right side of supraseptal chamber showing internal tentacles anterior to excurrent siphons. 52. Detail of right side of septum around byssal opening showing three groups of septal ostia. 53. Detail of mouth area showing labial palps. Note small posterior labial palps and position of foot extremity in relation to mouth. Scale bars: Figure 46 = 3 mm; Figures 51, 52 = 2 mm; Figure 53 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BGA = byssal gape; BY = byssus; DD = digestive diverticula; ES = excurrent siphonal opening; F = foot; FM = fused mantle margin; IS = incurrent siphonal opening; ISC = infraseptal chamber; IT = internal tentacles; K = kidney; MO = mouth; MSO = median group of septal ostia; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PE = periostracum; PLP = posterior labial palps; PSM = posterior septal muscle; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach (engorged by content, see Figure 57); UT = unpaired tentacle; TE = testis; TN = tentacles (on siphonal area).	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A214BB5AFF5DDC6BFF3E8A97.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182003/files/figure.png	https://doi.org/10.5281/zenodo.182003	FIGURES 54 – 58. Dilemma species, reconstructed macroanatomy. 54 – 57. Dilemma spectralis. 54. Left lateral view with part of mantle wall removed. 55. Detail of mantle cavity in left lateral view showing pair of internal tentacles along posterior edge of excurrent siphon. 56. Detail of mouth region showing labial palps. 57. Posterior region showing siphonal opening, tentacles, and stomach with prey item (a cirolanid isopod.). 58. Comparison of septal ostia in D. frumarkernorum (left) and D. spectralis (right). Posterior view, only left half of septum shown, with dorsal at top and not to scale. Scale bars: Figure 54 = 3 mm, Figure 55 = 2 mm, Figure 56 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BO = byssal opening; BY = byssus; DD = digestive diverticula; ES = excurrent siphon; IS = incurrent siphonal opening; ISC = infraseptal chamber; IST = prey item in stomach (a cirolanid isopod); IT = internal tentacles; ITN = tentacles deployed ventrally to incurrent siphon; JTN = tentacles deployed alongside intersiphonal junction; K = kidney; MG = midgut; MO = mouth; MSO = median group of septal ostia; OE = esophagus; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PLP = posterior labial palps; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; UT = unpaired tentacle.	FIGURES 54 – 58. Dilemma species, reconstructed macroanatomy. 54 – 57. Dilemma spectralis. 54. Left lateral view with part of mantle wall removed. 55. Detail of mantle cavity in left lateral view showing pair of internal tentacles along posterior edge of excurrent siphon. 56. Detail of mouth region showing labial palps. 57. Posterior region showing siphonal opening, tentacles, and stomach with prey item (a cirolanid isopod.). 58. Comparison of septal ostia in D. frumarkernorum (left) and D. spectralis (right). Posterior view, only left half of septum shown, with dorsal at top and not to scale. Scale bars: Figure 54 = 3 mm, Figure 55 = 2 mm, Figure 56 = 1 mm. Abbreviations: AA = anterior adductor muscle; ALP = anterior labial palps; ASO = anterior group of septal ostia; BO = byssal opening; BY = byssus; DD = digestive diverticula; ES = excurrent siphon; IS = incurrent siphonal opening; ISC = infraseptal chamber; IST = prey item in stomach (a cirolanid isopod); IT = internal tentacles; ITN = tentacles deployed ventrally to incurrent siphon; JTN = tentacles deployed alongside intersiphonal junction; K = kidney; MG = midgut; MO = mouth; MSO = median group of septal ostia; OE = esophagus; PA = posterior adductor muscle; PBR = posterior byssal retractor muscle; PLP = posterior labial palps; PSO = posterior group of septal ostia; OV = ovary; SE = septum; SC = incurrent siphonal cowl; SSC = supraseptal chamber; ST = stomach; UT = unpaired tentacle.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
081987A1A217BB5FFF5DDF0CFD808D5C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/182001/files/figure.png	https://doi.org/10.5281/zenodo.182001	FIGURES 34 – 45. Dilemma species. 34 – 40. Dilemma spectralis. Holotype, MNHN 20818, whole specimen and shell views. 34 – 35. Whole specimen. 34. Posterior. 35. Anterior. Left valve is broken adjacent to byssal gape. 36. Right and left valves, lateral. 37. Ligament in posterodorsal view. 38. Detail of posteroventral shell surface showing periostracum with spicules. 39. Detail of anteroventral shell surface showing periostracum with worn spicules. 40. Right valve, ventral view of internal surface showing hinge. Scale bars: Figures 34 – 36 = 5 mm; Figures 37 – 40 = 1 mm. 41 – 45. Dilemma inexpectatum (Crozier, 1966). Holotype, NMNZ M. 018488, left valve. 41 – 44. Valve views, from left to right: posterior, internal lateral, anterior, external lateral. 45. Detail showing cardinal-like tooth. Scale bars: Figures 41 – 44 = 5 mm; Figure 45 = 1 mm. Abbreviations: AAS = scar of anterior adductor muscle; BG = byssal gap; BGA = byssal gape (in mantle of broken shell); CT = cardinal-like tooth; ES = escutcheon; HS = hinge socket; IL = inner ligament layer; OL = outer ligament layer; SM = shell margin. Figures 41? 44 courtesy Bruce Marshall, copyright Museum of New Zealand Te Papa Tongarewa.	FIGURES 34 – 45. Dilemma species. 34 – 40. Dilemma spectralis. Holotype, MNHN 20818, whole specimen and shell views. 34 – 35. Whole specimen. 34. Posterior. 35. Anterior. Left valve is broken adjacent to byssal gape. 36. Right and left valves, lateral. 37. Ligament in posterodorsal view. 38. Detail of posteroventral shell surface showing periostracum with spicules. 39. Detail of anteroventral shell surface showing periostracum with worn spicules. 40. Right valve, ventral view of internal surface showing hinge. Scale bars: Figures 34 – 36 = 5 mm; Figures 37 – 40 = 1 mm. 41 – 45. Dilemma inexpectatum (Crozier, 1966). Holotype, NMNZ M. 018488, left valve. 41 – 44. Valve views, from left to right: posterior, internal lateral, anterior, external lateral. 45. Detail showing cardinal-like tooth. Scale bars: Figures 41 – 44 = 5 mm; Figure 45 = 1 mm. Abbreviations: AAS = scar of anterior adductor muscle; BG = byssal gap; BGA = byssal gape (in mantle of broken shell); CT = cardinal-like tooth; ES = escutcheon; HS = hinge socket; IL = inner ligament layer; OL = outer ligament layer; SM = shell margin. Figures 41? 44 courtesy Bruce Marshall, copyright Museum of New Zealand Te Papa Tongarewa.	2008-12-31	Leal, Jos Ẽ H.		Zenodo	biologists	Leal, Jos Ẽ H.			
