Nannamoria cadella Hawke, 2021

Nannamoria cadella Hawke, 2021 View in CoL

Figure 6A View FIGURE 6

Pattern description. “False” triangle pattern (defined from the lack of pigment in a pigmented background) present on body whorl and first two whorls of spire. Pattern appearance the same as Nannamoria sp. , aside from two medium-weight lines running spirally through the body whorl. These lines are interrupted by triangles.

Comment. Nannamoria cadella Hawke, 2021 in its original description was said to be comparable to Nannamoria trionyma Darragh, 1988 but with a smaller size, fewer shoulder nodules, which are also less developed, and with occurrence only in the Murbko Marl. No colour pattern for N. trionyma is known. Darragh (2024) synonymised the two species. We have continued to use N. cadella here for the following reasons: N. trionyma has not previously been recorded from the Murbko Marl, and each of the specimens studied follow the features given for N. cadella by Hawke (2021), with smaller shell sizes and fewer shoulder nodules (between 5 and 7).

As the colour pattern for N. trionyma is currently unknown and we do not have access to previously identified N. trionyma fossils, it is our hope that the colour pattern revealed here can be used in the future for comparison with analysis of Victorian material of N. trionyma to help address this issue, and either justify of refute the validity of N. cadella .