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FIGURE 4 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 4. Aponema martinezi sp. n., female, paratype. A, total view; B, anterior end. Scale bars: A = 50 µm; В = 20 µm.

FIGURE 10 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 10. Microlaimus abyssalis sp. n., males. A, paratype No. 1, head; B, paratype No. 2, tail. Scale bars = 20 µm.

FIGURE 19 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 19. Microlaimus parviporosus sp. n., light micrographs. A, female, paratype No. 7, pores at cervical part (marked by arrows); B, female, paratype No. 7, head, optical section at level of stoma; C, paratype No. 5, female, pharyngeal bulb; D, male, holotype, anal region, optical section at level of distal part of spicule; E, male, paratype No. 4, dorsal row of pores; F, male, holotype, anal region, optical section at level of gubernaculum (marked by arrow); G, male, holotype, posterior testis (marked by arrow); H, female, paratype No. 7, vulvar region (thickened sclerotized part of dorsal wall of uterus marked by arrow); I, female, paratype No. 5, vulvar region (thickened sclerotized part of dorsal wall of uterus marked by arrow). Scale bars: A–F, H–I = 10 µm; G = 20 µm.

FIGURE 3 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 3. Aponema martinezi sp. n., male, holotype, light micrographs. A, anterior end; B, beginning of testis (marked by arrow); C, anal region, optical section at level of distal part of spicule; D, anal region, optical section at level of gubernaculum. Scale bars: A, B = 20 µm; C, D = 10 µm.

FIGURE 2 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 2. Aponema martinezi sp. n., male, holotype. A, total view; B, posterior end; C, anterior end. Scale bars: A = 50 µm; B, C = 20 µm.

FIGURE 5. Caligocanna mirabilis, males. 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 5. Caligocanna mirabilis, males. A, specimen No. 1, head; B, specimen No. 1, anterior end; C, specimen No. 1, total view; D, specimen No. 3, copulatory apparatus. Scale bars: A, B = 20 µm; C = 100 µm; D = 10 µm.

FIGURE 12 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 12. Microlaimus abyssalis sp. n., light micrographs. A, male, paratype No. 2, head; B, female, paratype No. 6, head; C, male, holotype, pharyngeal bulb; D, female, paratype No. 6, vulvar region; E, male, holotype, anterior testis; F, male, holotype, posterior testis; G, male, paratype No. 2, spicula and gubernaculum. Scale bars: A, B, G = 10 µm; C–F = 20 µm.

FIGURE 9 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 9. Microlaimus abyssalis sp. n., male, holotype. A, head; B, tail; C, total view. Scale bars: A, B = 20 µm; C = 100 µm.

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.

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FIGURE 1 in New Hexactinellid Sponge Chaunoplectella megapora sp. nov. (Lyssacinosida: Leucopsacidae) from Clarion-Clipperton Fracture Zone, Eastern Pacific Ocean

FIGURE 1. Chaunoplectella megapora sp. nov. A, holotype in situ. B, preserved holotype. C and C', choanosomal hexactin and its end. D, ray end of diactin. E, diactin. F, pentactin. G, stauractin. H and H', hexactin and its end. I, toothed discohexaster. J, secondary ray of toothed discohexaster. K, toothed hemidiscohexaster. L, secondary ray of toothed hemidiscohexaster. M, sigmatocome with hemidiscohexaster. N, primary rosette of sigmatocome. O, broken secondary ray of sigmatocome. P, anchorate discohexaster. Q, codonhexaster. R, stellate discohexaster (arrow). S, unique sigmatocome.

FIGURE 49. Pierrella plicata n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 49. Pierrella plicata n. sp. A, paratype, ZIRAS 2/50728; B–E, holotype, ZIRAS 1/50727; F, G, specimen YMG4–07, Stn 139. Specimens stained in Rose Bengal. A–E, zooids on arenaceous foraminiferan tubes, varying from linear and caudate to squat and more crowded; F, G, stained zooids seen in transmitted light. Abbreviations: at, alimentary tract; d, diaphragm; dmtd, dilator muscles and tendon of diaphragm; ofcp, orifice with folded cuticular pleats; pm, parietal muscles; r, rectum; rmtc, retractor muscles of tentacle crown; rt, retracted tentacles; sc, stomach caecum; t, tentacles; v, vestibule (filled with sediment). Scale bars: A–E, 500 µm; F, G, 50 µm.

FIGURE 50. Pierrella plicata n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 50. Pierrella plicata n. sp. A, I, J, paratype, ZIRAS 2/50728; B–H, K, L, holotype, ZIRAS 1/50727. A, H, narrow, long-caudate zooids; C–E, G, squat zooids; B, F, zooids of intermediate shape; I–L, stiffly pleated orificial folds. Scale bars: A–D, 250 µm; E–H, 100 µm; I–L, 25 µm.

FIGURE 46 in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 46.?Anyutidae sp. incertae sedis. A–G, I–K, colony ZIRAS 1/50725; H, specimen GLD4–12, Stn 257. A, B, apical and oblique lateral views of capitulum (partly damaged); C, alveoli of capitulum surface; D, skeletal microstructure; E, crosssection through fascicle of autozooids and alveolar cavities; F, G, I, J, close-ups of fascicles of varied sizes and zooid dispositions; H, small fascicle in which one peristome has a calcified terminal diaphragm; K, interior wall of broken peristome showing crystallites. Scale bars: A, 500 µm; B, F, 250 µm; C, E, G, 200 µm; D, K, 50 µm; H–J, 100 µm.

FIGURE 43. Rallocytus ridiculus n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 43. Rallocytus ridiculus n. gen., n. sp. Paratype 1, ZIRAS 2/50724. A–D, apical and oblique views of fertile colony with two dimorphic zooids (arrowed), one with its aperture facing frontalwards, the other peristome turned slightly toward calyx center; E, F, peristomes, including a smaller frontally facing dimorphic one; G, two autozooidal peristomes with incurved dimorphic peristome between; H, base of column; I, skeletal microstructure; J, K, showing dimorphic and autozooidal apertures, respectively. Scale bars: A–C, 250 µm; D–H, 100 µm; J, K, 50 µm; I, 25 µm.

FIGURE 40. Anyuta anastema n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 40. Anyuta anastema n. gen., n. sp. Holotype, ZIRAS 1/50718. A, part of fascicle with autozooidal peristomes and two dimorphic peristomes with flanges; note large shallow alveoli on sides of peristomes; B, two peristomes, left one dimorphic; C, skeletal microstructure of part of peristome in L; D–G, subfascicles with both autozooidal and flanged dimorphic peristomes; H, close-up of squat flanged dimorphic peristome in E; note small alveoli on flanks of peristome; I, close-up of lower dimorphic peristome in F, showing it to be derived from an autozooidal peristome by its partial closure; J, base of column; K, L, close-ups of perforated flanges of dimorphic peristomes. Scale bars: A, B, D, F, 250 µm; G–J, 100 µm; K, L, 50 µm; C, 25 µm.

FIGURE 39. Anyuta anastema n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 39. Anyuta anastema n. gen., n. sp. A–D, holotype, ZIRAS 1/50718, in apical and lateral profiles; note the clusters of fascicles, at least three of which have dimorphic orifices with terminal flanges (dimorphic orifices arrowed). Scale bars: 500 µm.

FIGURE 37. Genus et species indet. A, D, F, G, colony 1, GLD4–11, Stn 211 in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining

FIGURE 37. Genus et species indet. A, D, F, G, colony 1, GLD4–11, Stn 211, respectively showing capitulum with gonozooid floor developing across alveoli, and autozooidal peristomes at periphery; B, C, E, H, I, colony 2, GLD4–12, Stn 255, similar views of a colony with two gonozooid floors developing. Scale bars: A, B, 250 µm; C–H, 100 µm; I, 50 µm.