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FIGURE 16. Microlaimus discolensis, light micrographs. A in Deep-sea nematodes of the family Microlaimidae from the Clarion-Clipperton Fracture Zone (North-Eastern Tropic Pacific), with the descriptions of three new species*

FIGURE 16. Microlaimus discolensis, light micrographs. A, specimen No. 1, male, head; B, specimen No. 1, male, region of pharyngeal bulb; C, specimen No. 1, male, dorsolateral row of pores; D, female No. 3, dorsolateral row of pores (marked by arrows) and associated glands; E, specimen No. 1, male, ventrolateral row of pores; F, specimen No. 1, male, anal region, optical section at level of gubernaculum; G, No. 1, male, anal region, optical section at level of distal part of spicules. Scale bars: A, E–G = 10 µm; B–D = 20 µm.

FIGURE 15. Microlaimus discolensis, females. A in Deep-sea nematodes of the family Microlaimidae from the Clarion-Clipperton Fracture Zone (North-Eastern Tropic Pacific), with the descriptions of three new species*

FIGURE 15. Microlaimus discolensis, females. A, specimen No. 3, total view; B, specimen No. 3, head; C, specimen No. 2, dorsal pore and associated gland. Scale bars: A = 50 µm; B = 20 µm; C = 10 µm.

FIGURE 18 in Deep-sea nematodes of the family Microlaimidae from the Clarion-Clipperton Fracture Zone (North-Eastern Tropic Pacific), with the descriptions of three new species*

FIGURE 18. Microlaimus parviporosus sp. n., females. A, paratype No. 5, anterior end; B, paratype No. 5, reproductive system; C, paratype No. 5, posterior end; D, paratype No. 7, region of vulva. Scale bars: A, B = 20 µm; C, D = 10 µm.

FIGURE 21 in Deep-sea nematodes of the family Microlaimidae from the Clarion-Clipperton Fracture Zone (North-Eastern Tropic Pacific), with the descriptions of three new species*

FIGURE 21. Microlaimus porosus, females, light micrographs. A, specimen No. 1, head; B, specimen No. 2, head; C, specimen No. 1, two rows of ventrolateral pores (marked by arrows); D, specimen No. 3, anterior end; E, specimen No. 2, region of pharyngeal bulb; F, specimen No. 3, row of ventrolateral pores. Scale bars: A, B, D, F = 10 µm; C, E = 20 µm.

FIGURE 10 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 10. Stereodikyoma mollis Gooday & Holzmann gen. & sp. nov. A, B, Holotype, RC1623 (BC039); shipboard photographs of intact specimen attached to nodule. C–F, Paratype, RC1697 (BC040). C, D, Shipboard photographs. E, F, Laboratory photographs (Geneva) of the two largest fragments.

FIGURE 9 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 9. Claraclippia seminuda Gooday & Holzmann gen. & sp. nov.; holotype, RC0202 (BC005). A, B, Laboratory photographs taken in Geneva; details of test surface showing stercomate branches, reddish granellare strands, and the surface veneer of fine particles, which was then still partially intact. C–F, Laboratory photographs of fragments consisting mainly of stercomare branches; the photographs were taken in Southampton, by which time the surface veneer of fine particles had largely disappeared.

FIGURE 6 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 6. Abyssalia aff. foliformis, shipboard photographs; RC0615 (BC011). A, B, Two different side views. C, Test viewed from above. D–F, Details of test; the yellow tube in E is probably part of a Saccorhiza ramosa test.

FIGURE 3 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 3. Aschemonella tani Gooday & Holzmann sp. nov.; holotype RC1555 (BC036). A, Shipboard photograph showing grouping of structures on nodule summit; numbers 1–3 identify parts illustrated in other photographs. B–F, Laboratory photographs. B, Part 1 from top of nodule. C, Part 2. D, E, Part 3 viewed from different sides. F, Detail of Part 3.

FIGURE 13 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 13. Psammina multiloculata Kamenskaya, Gooday & Tendal, 2015; specimen RC1019 (BC025). A–C, Shipboard photographs showing side views of test and view from above. D–H, Laboratory photographs. D, Entire specimen; the test had been damaged since it was photographed on the ship. E, Detail of damaged side plate. F, Detail of surface of main plate showing external expression of internal compartments. G, Detail of edge of plate showing stercomare. H, Broken edge showing cross sections of compartments.

FIGURE 2. Aschemonella monilis Gooday & Holzmann 2017. A–D, Sequenced specimens. A in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 2. Aschemonella monilis Gooday & Holzmann 2017. A–D, Sequenced specimens. A, Dark specimen attached to nodule; RC1056 (BC026). B, Interior of test fragment with red granellare (after removal of most pieces for sequencing) and dark stercomare; RC0056 (BC001). C, Fragment with two segments; RC0490B (BC010). D, E, RC1900.1 (BC045). D, Fragment with broken segment containing granellare. E, Detail of dome and tubular apertural structure. F, G, Specimens without cytoplasm; RC1900.2 (BC045). F, Complete fragment. G, Detail of apertural structures. No scale is available for B.

FIGURE 1 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 1. PhyML phylogenetic tree based on the 3'end fragment of the SSU rRNA gene, showing the evolutionary relationships of 79 foraminiferal sequences belonging to monothalamids. Specimens marked in bold indicate those for which sequences were acquired during the present study. The tree is unrooted. Specimens are identified by their accession numbers. Numbers at nodes indicate bootstrap values (BVs). Only BVs>70% are shown.

FIGURE 5. Abyssalia foliformis Gooday & Holzmann 2020 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 5. Abyssalia foliformis Gooday & Holzmann 2020; RC0612 (BC015). A, Shipboard photograph of unique test fragment. B–F, Laboratory photographs of test fragment; the stercomare had been lost from the central part of the fragment. C, D, Details of fragment showing granellare. E, Fragments of cytoplasm detached from test; note that the fragments are partly attached to sponge spicules. F, Loose stercomare pellets that had fallen out of the test.

FIGURE 15 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 15. Stanophyllum aff. granulatum; specimen that was not sequenced, RC0608 (BC015). A, B, D Shipboard photographs C, E, F, Laboratory photographs. A, B, Specimen attached to a nodule. C. Specimen detached. D, Base of test showing attachment to nodule. E, Detail of surface. F, Edge of test showing organic fibres (linellae). Scales were not available for A and B.

FIGURE 14 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 14. Stanophyllum aff. granulatum; sequenced specimen RC0489 (BC010). A, B Shipboard photographs A, Specimen attached to a nodule. B. Side view. C–F, Laboratory photographs. C, Entire specimen. D, E, Edge of test showing granellare branches and fringe of radiolarians attached to organic fibres (linellae). F, Granellare removed from test.

FIGURE 4 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 4. Aschemonella tani Gooday & Holzmann sp. nov., laboratory photographs of fragments from holotype; RC1555 (BC036). A, Detail of Part 1 from summit of nodule showing dark stercomare seen through wall of test. B, Part 2 broken open to expose stercomare. C, Detail of stercomare in Part 2. D, Granellare strands.

FIGURE 8 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 8. Claraclippia seminuda Gooday & Holzmann gen. & sp. nov., shipboard photographs; holotype, RC0202 (BC005). A, B, Test photographed on the surface of the box core immediately after collection. C, D, Test removed from box core. E, F, Details of test; note the small open spaces. Arrows indicate the same feature in A–D; asterisk indicate point of attachment. Scales are not available for B and C.

FIGURE 7 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 7. Abyssalia aff. foliformis, laboratory photographs; Specimen RC0615 (BC011). A, Fragment. B, Detail of edge. C–D, Broken edge showing granellare embedded in dak stercomare masses.

FIGURE 12. Shinkaiya contorta Gooday & Holzmann 2017 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 12. Shinkaiya contorta Gooday & Holzmann 2017; Laboratory photographs; specimen RC0160 (BC004). A, Exterior of fragment. B, Broken edge. C–E, Interior surfaces of fragments showing stercomare. F, Granellare fragments with attached pieces of stercomare. G, Fragment with partially exposed interior. Scales were not available for D and E.

FIGURE 11. Shinkaiya contorta Gooday & Holzmann 2017 in New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)

FIGURE 11. Shinkaiya contorta Gooday & Holzmann 2017; Specimen RC0160 (BC004). A, Shipboard photograph of fragment. B–E, Laboratory photographs. B, Collection of fragments. C, Broken fragment showing interior. D, Detail of broken fragment with exposed interior. E, Complete fragment. E, Section of test exposed on broken surface.