Psammina aff. limbata form 1 sensu Gooday et al. 2018

Supplementary Fig. S6

Psammina aff. limbata form 1. Gooday et al., 2018, 930–934, Figs 3–5, Supplementary Fig. S1C–F.

Material examined. Box core 040. Specimen RC1699 (morphology). Box core 036. Specimen RC1588 (morphology). Dried.

Remarks. RC1677 (Fig. 6A, B). The specimen includes only the upper fan-shaped part of the test, which has broken off near the top of the stalk. The fan is ~ 11 mm and whole fragment is 8.4 mm high. There is a very obvious pale rim, devoid of the stercomare that occupy the remainder of the test. The specimen is undoubtedly the same as the form described by Gooday et al. (2018), particularly in terms of the agglutinated particles, which includes numerous agglutinated foraminifera, many of them orange in colour. This form is probably the same as Psammina limbata from the Russian license area, although this cannot be confirmed in the absence of genetic data for any of the Russian specimens.

RC1558 (Fig. 6C–F). The specimen was dried soon after collection and is greyish-brown in overall colour. The upper part is fan shaped, gently curved, and somewhat asymmetrical, merging into the stalk on one side and joining it more abruptly and at a higher point on the other side. The maximum width is 25.7 mm and the overall height 22.4 mm, of which ~ 5.9 mm is occupied by the stalk and ~ 16.6 mm by the fan. The fan-like part is 1.80–2.06 mm thick. The stalk is strongly tapered, from about 5.88 mm to 1.56 mm. The bases of several rod-like ‘roots’ arise from the lower part of the fan and the top of the stalk, 5 on one side, 2 on the other.

The test surface is fairly smooth, apart from clearly-developed, concentrically zoned undulations. The wall comprises a matrix of small mineral grains and tiny spicule fragments in which are embedded radiolarians, a few longer spicules and occasional agglutinated foraminiferan tests and larger mineral grains. The margin of the fan is abraided, exposing the interior, which comprises an open meshwork of spicules to which are attached radiolarians. The test wall is very thin, around 40–60 µm.