Comparison with Thecidellina congregata Cooper, 1954

1954 Thecidellina congregata: Cooper, pp. 316–317; pl. 80, figs. 8–13.

1983 Thecidellina congregata: Grant, pp. 82–83; figs. 6–8.

2008 Thecidellina congregata: Logan, pp. 411–412, figs. 6.10–6.17.

2007 Thecidellina maxilla: Bitner, fig. 3F.

2015 Thecidellina maxilla: Bitner, fig. 5A–E.

The adult shell is larger. Brachial cavities have peculiar single canopying spicules that are very massive in the anterior part of the canopies and much thinner in their posterior part (Cooper 1954, pl. 80, figs. 10–13; Logan, 2008, figs. 6–17). In the smaller shell of T. mawaliana sp. nov. the canopies are made of very thin, fragile spicules all fused together.