dc:title"A new deepsea pectinid bivalve from thermal vents of Manus backarc Basin (southwestern Pacific), Sinepecten segonzaci n. gen., n. sp. (Pectinoidea: Pectinidae), and its relationships with the genera Bathypecten and Catillopecten";
dc:description"FIGURE 4. Holotype of Sinepecten segonzaci. a: upper (left) valve; b: lower (right) valve; c: dorsal region of the right valve showing the anterodorsal margin of the disk (black arrow) slightly overlapping the anterior auricle (aa). White arrow indicating a sharp growth line (see text).";
dc:description"FIGURE 5. Life posture in Sinepecten segonzaci n. gen., n. sp. with byssal fixation compared in juveniles (sp. 2 – 4) and in the largest adult specimen (sp. 6), i. e. the holotype. a: parasagittal sections of bivalve specimens: tight byssal fixation fitting the lower (right) valve to the substrate; b: external view of anterodorsal region of shell underside. Inner surface of upper (left) valve (grey) appears behind byssal notch of lower valve; c: parasagittal section along xy showing byssus emerging from byssal notch. aa: anterior auricle; bf: byssal fasciole; bn: byssal notch; bs: byssal sinus. Arrows in (b) and (c) indicating relative growth direction of dorsal and ventral edges of byssal notch. On all figures, thick outline corresponding to lower (right) valve, coarse stipple to shell interior, and fine stipple to inner face of left valve.";
dc:description"FIGURE 6. Ontogeny of right valve anterior auricle and byssal notch. The specimens sp. 2 to sp. 6 (a) are laid flat. Byssal notch of sp. 6 is hidden in (a); in (b) sp. 6 is tilted forward to make it conspicuous. Behind the right valve, the left valve is present, umbonal part stippled, internal surface black. Horizontal lines: hollow of byssal fasciole.";
dc:description"FIGURE 7. Right valve outline and prismatic calcite extent through ontogeny. The five specimens (2 to 6) are drawn at the same size to emphasize the change in outline from prismatic stage (dark grey) to adult. Extent of prismatic calcite on anterior auricle (AA) indicated only on sp. 2.";
dc:description"FIGURE 8. Juvenile paratypes of Sinepecten segonzaci. a: specimen 2, lower (right) side of the anterodorsal region; b: lower side of specimen 3 showing the marginal apron of the right valve (arrows).";
dc:description"FIGURE 9. SEM views of specimens 2 (a, c) and 4 (b, d – f) of Sinepecten segonzaci. a: outer view of the anterodorsal region of the right valve; b: inner view of the anterodorsal part of the right valve; c: magnification of the outer layer of (a) near the ventral margin; d: calcite laths of the foliated structure; e: inner view of the beak region of the left valve (see Figure 12); f: hinge surface, magnification as in (d).";
dc:description"FIGURE 11. SEM views of specimens 2 (a, b, e) and 4 (c, d, f) of Sinepecten segonzaci. a: outer view of the left valve; b: same valve, detail of the ornamentation near the ventral margin of the disk; c: left valve, anterior margin of the disk; d: same valve, magnification of the antimarginal microsculpture; e: same valve, detail of ornamentation on the anterior edge of the anterior auricle; f: particles embedded on the disk surface of the right valve; on all figures arrow indicates the growth direction.";
