TABLE 4 in Bouchetaria (Gastropoda: Cypraeidae), a new genus for the Riddle cowry, B. aenigma (Lorenz 2002), from the deep waters of the Mozambique Channel

TABLE 4. Shell comparison of B.aenigma with phylogenetically closely related species (see Figure2). The conchologically dissimilar Ipsa childreni (J. E. GRAY 1825) (see Figure 6 h) is excluded. Nesiocypraea midwayensis not obtained for molecular analyses is included for morphological comparison with Nesiocypraea teramachii. Propustularia surinamensis (Figure 5 g)Bouchetaria aenigma (Figure 4)Nesiocypraea midwayensis (Figure 6 c-e)Nesiocypraea teramachii (Figure 6 a-b)Fossulaflat, weak denticlesprojecting,distinctly denticulateprojecting, smoothSpiresmall, pointed, partly concealedlarge, pointed, mostly exposedsmall, pointed, mostly concealedlarge, flat, exposed, or covered by callusCol. teethcoarse, extendingfine, extendingfine, restrictedfine, restricted to the peristomedental branchesrare, towards tipspresent throughoutabsentflangesfaintly pittedsmoothterminal ridgeshort, ribbed, flatlong, slopingshort, slopinglong, less slopingring of spotsabsentindicateddistinct,confluentdorsal patterndensely mottledabsentfine spotting tofine spotting to confluent blotchingcolor of baseredpure whitecreamcream to orange表4 系统发育近缘物种与B.aenigma的壳体形态对比（参见图2）。形态学上差异显著的孩子芋螺（Ipsa childreni，J. E. GRAY 1825）（参见图6h）未纳入本次对比。未获取分子分析样本的中途岛宝贝（Nesiocypraea midwayensis）被纳入，用于与寺町宝贝（Nesiocypraea teramachii）开展形态学对比。 | 壳体特征项 | 苏里南宝贝（*Propustularia surinamensis*，图5g） | 贝氏谜宝螺（*Bouchetaria aenigma*，图4） | 中途岛宝贝（*Nesiocypraea midwayensis*，图6c-e） | 寺町宝贝（*Nesiocypraea teramachii*，图6a-b） | |------------------|------------------------------------------------|----------------------------------------|------------------------------------------------|---------------------------------------------| | 脐沟（Fossula） | 平坦，具弱齿突 | 突出，具明显齿突 | 突出，表面光滑 | — | | 螺塔（Spire） | 低矮尖突，部分被遮盖 | 高大尖突，大部分裸露 | 低矮尖突，大部分被遮盖 | 高大扁平，裸露或被胼胝覆盖 | | 轴齿（Col. teeth）| 粗壮，延伸至壳轴全长 | 纤细，延伸至壳轴全长 | 纤细，局限于壳轴局部 | 纤细，仅局限于壳口缘 | | 齿分枝 | 稀少，仅分布于壳轴尖端 | 遍布壳轴 | 无 | — | | 壳褶 | 具微弱凹坑 | 光滑 | — | — | | 端脊 | 短，具肋纹、扁平 | 长，倾斜 | 短，倾斜 | 长，倾斜度较小 | | 斑点环 | 无斑点环 | 具隐约斑点环 | 清晰且融合成片 | — | | 背面花纹 | 密集斑驳 | 无花纹 | 细斑点至融合斑状 | 细斑点至融合斑状 | | 基部颜色 | 红色 | 纯白色 | 奶油色 | 奶油色至橙色 |