FIGURE 4. Comparison of oral plate architecture of <i>Iheringiella patagonensis</i> (Desor, 1847) (based on ROM 5433M), <i>Abertella gualichensis</i> Martínez et al., 2005 (based on the holotype, MACN-Pi 4706), <i>Abertella pirabensis</i> (Marchesini Santos, 1958) (reconstruction based on the holotype and only known specimen, DNPM 4493, details of interambulcrum 2 inferred by comparison with interambulacrum 4, and of ambulacrum V by comparison with ambulacrum I), and <i>Placatenella complanata</i> (Brito, 1981) (based on the holotype, MNRJ 5460-I, as well as MNRJ 5536-I, MPEG 886-I, MPEG 2405-I). Food grooves indicated by dotted lines, peristome and periproct in solid black, interambulacra shaded, scale bars 10 mm in length.
Mooi <i>et al.</i> 2018. Late Oligocene–Miocene non-lunulate sand dollars of South America: Revision of abertellid taxa and descriptions of two new families, two new genera, and a new species. <i>Zootaxa</i> 4369(3): 301–326.
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