taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
03B987E8F008FFAFFCC21C335FEDEA1E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/12709653/files/figure.png	https://doi.org/10.5281/zenodo.12709653	FIGURE 1. Diagrammatic transverse sections comparing the posterior portion of the ligament and nymphae of Acharax and Solemya. A, the upward-arching (parivincular) external ligament and nymphae, i.e., the plesiomorphic condition as seen in Acharax. (Drawing based on Carter, 1990, fig. 17D; Bailey, 2011, pl. 4, figs. 4-6; and Taviani et al., 2011, fig. 5). B, external nymphae of Acharax with the ligament removed. When the ligament is not preserved, the nymphae are visibly separated by an internymphal gap. C, hypothetical intermediate condition showing beginning stages of ligament depression and inward rotation of nymphae (arrows). D, submarginal ligament and nymphae - the apomorphic condition seen in Solemya. The depressed ligament is secondarily overgrown by a shelly outer prismatic layer. (After Carter, 1990, fig. 17A.) E, the submarginal nymphae of Solemya with the ligament removed. Notice the outer secondary layer that covers the former internymphal gap. Abbreviations: ne - external nymph, ns - submarginal nymph gr - ligament insertion groove, ig - internymphal gap, lgf - fibrous inner layer of ligament, lgl - lamellar outer layer of ligament, pe - periostracum, opl - outer (secondary) prismatic shell layer.	FIGURE 1. Diagrammatic transverse sections comparing the posterior portion of the ligament and nymphae of Acharax and Solemya. A, the upward-arching (parivincular) external ligament and nymphae, i.e., the plesiomorphic condition as seen in Acharax. (Drawing based on Carter, 1990, fig. 17D; Bailey, 2011, pl. 4, figs. 4-6; and Taviani et al., 2011, fig. 5). B, external nymphae of Acharax with the ligament removed. When the ligament is not preserved, the nymphae are visibly separated by an internymphal gap. C, hypothetical intermediate condition showing beginning stages of ligament depression and inward rotation of nymphae (arrows). D, submarginal ligament and nymphae - the apomorphic condition seen in Solemya. The depressed ligament is secondarily overgrown by a shelly outer prismatic layer. (After Carter, 1990, fig. 17A.) E, the submarginal nymphae of Solemya with the ligament removed. Notice the outer secondary layer that covers the former internymphal gap. Abbreviations: ne - external nymph, ns - submarginal nymph gr - ligament insertion groove, ig - internymphal gap, lgf - fibrous inner layer of ligament, lgl - lamellar outer layer of ligament, pe - periostracum, opl - outer (secondary) prismatic shell layer.	2021-12-31	Bailey, Jack Bowman		Zenodo	biologists	Bailey, Jack Bowman			
03B987E8F008FFAFFCC21C335FEDEA1E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/12709655/files/figure.png	https://doi.org/10.5281/zenodo.12709655	FIGURE 2. Comparative internal views of the posterior portion of the right valves of Acharax (A) and Solemya (B) showing character states of the nymphae, internal buttresses and posterior adductor scars. In Acharax the nymph (ne) is external, the condition of the internal buttress is simple (bts), and the condition of the posterior adductor muscle scar is entire (pae). In Solemya, depression of the nymph to a submarginal position (ns) results in a compound buttress (btc) and an occluded posterior adductor scar (pao).	FIGURE 2. Comparative internal views of the posterior portion of the right valves of Acharax (A) and Solemya (B) showing character states of the nymphae, internal buttresses and posterior adductor scars. In Acharax the nymph (ne) is external, the condition of the internal buttress is simple (bts), and the condition of the posterior adductor muscle scar is entire (pae). In Solemya, depression of the nymph to a submarginal position (ns) results in a compound buttress (btc) and an occluded posterior adductor scar (pao).	2021-12-31	Bailey, Jack Bowman		Zenodo	biologists	Bailey, Jack Bowman			
03B987E8F008FFAFFCC21C335FEDEA1E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/12709657/files/figure.png	https://doi.org/10.5281/zenodo.12709657	FIGURE 4. Phyletic schemes and biostratigraphic ranges (solid bars) of Paleozoic solemyoid genera. A, phyletic scheme of Pojeta (1988, fig. 3) postulating derivation of the Clinopisthinae and Solemyinae from nuculoid ancestors (i.e., Ctenodonta). B, proposed modifications (in red) of Pojeta’s scheme based on studies herein. Abbreviations of generic names: A. = Acharax; Cl. = Clinopistha; Ct. = Ctenodonta; D. = Dystactella; ‘J.’ = Janeia; and M. = Manzanella.	FIGURE 4. Phyletic schemes and biostratigraphic ranges (solid bars) of Paleozoic solemyoid genera. A, phyletic scheme of Pojeta (1988, fig. 3) postulating derivation of the Clinopisthinae and Solemyinae from nuculoid ancestors (i.e., Ctenodonta). B, proposed modifications (in red) of Pojeta’s scheme based on studies herein. Abbreviations of generic names: A. = Acharax; Cl. = Clinopistha; Ct. = Ctenodonta; D. = Dystactella; ‘J.’ = Janeia; and M. = Manzanella.	2021-12-31	Bailey, Jack Bowman		Zenodo	biologists	Bailey, Jack Bowman			
03B987E8F002FFB4FC571852596AE880.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/12709659/files/figure.png	https://doi.org/10.5281/zenodo.12709659	FIGURE 5 (caption on next page).	FIGURE 5 (caption on next page).	2021-12-31	Bailey, Jack Bowman		Zenodo	biologists	Bailey, Jack Bowman			
