FIGURES 34–45. Dilemma species. 34–40. Dilemma spectralis. Holotype, MNHN 20818 in A remarkable new genus of carnivorous, sessile bivalves (Mollusca: Anomalodesmata: Poromyidae) with descriptions of two new species

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.