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FIGURES 29–34 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURES 29–34. Calliostoma maurolici on various substrates. 29. Caracole/PL129-7 (ROV). Grazing on dead Lophelia pertusa framework. 30. M61-3/632 (GeoB 9285, ROV). Grazing on dead Lophelia pertusa framework portions. 31. POS 400/GeoB 14544 (ROV 3). Grazing on a Madrepora oculata colony. 32. POS400/GeoB 14548 (ROV5). Two specimens of different age grazing in close vicinity on dead coral framework. 33. POS400/GeoB 14543 (ROV2). Grazing on deep-sea anemone Phelliactis hertwigii. 34. POS400/GeoB 14548 (ROV5). Grazing on epiliths, grown on a hardground. [Fig. 29 was taken by ROV "VIC- TOR 6000", IFREMER, France. Fig. 30 was taken by ROV "QUEST 4000" and Figs 31–34 were taken via ROV "Cherokee", MARUM, Bremen University, Germany.]

FIGURES 21–28. Calliostoma maurolici, 21–24. Moundforce2004 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURES 21–28. Calliostoma maurolici, 21–24. Moundforce2004/37, Juvenile specimen, H 1.4 mm, W 1.5 mm, protoconch W 0.48 mm, T 0.36 mm, scale bar 0.1 mm. 25. Specimen from limestone outcrop, St. Paul's Bay, Rhodes, Mid-Pleistocene (private collection A. Freiwald). 26–28. M61-3/603, live-collected, H 16 mm, W 19 mm.

FIGURES 15–20 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURES 15–20. Calliostoma bullatum on substrates. 15. MSM16-3/GeoB 14871 (ROV5). Grazing on carnivorous sponge Cladorhiza corallophila; arrow indicating grazing effect. 16. MSM16-3/GeoB 14902 (ROV10). On framework encrusting sponge. 17. MSM16-3/GeoB 14902 (ROV10). Grazing on a valve of live Acesta excavata, which is colonised by epibionts; the two laser points are at a distance of 6 cm. 18. MSM16-3/GeoB 14902 (ROV10). Grazing on a valve of dead Acesta excavata (note in direct surrounding the free portions of epibionts on the valve and the white framework portions of Lophelia pertusa lacking any tissue). 19. MSM16-3/GeoB 14902 (ROV10). Grazing on a gastropod shell (Ranella olearium). 20. MSM16-3/ GeoB 14891 (ROV9). Grazing on dead hydroid axis in close vicinity to a Solenogastres.

FIGURE 1 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURE 1. Distribution maps of Calliostoma bullatum and Calliostoma leptophyma (left) and of Calliostoma maurolici (right). In the left map, empty shells of Calliostoma bullatum as red diagonal crosses, live observations as yellow triangles, empty shells of Calliostoma leptophyma as red normal crosses, live observations in this study as green triangles, live observations from literature as green diamonds. In the right map, empty shells of Calliostoma maurolici as red normal crosses, live observations as yellow triangles, live observations from literature as green diamonds. Bathymetry data source: GEBCO, depth contour intervals 500 m.

FIGURES 9–14 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURES 9–14. Calliostoma bullatum on various substrates. 9. MSM16-3/GeoB 14871 (ROV4). Grazing on hydroids. 10. MSM16-3/GeoB 14871 (ROV4). Elongated, muscular foot supports feeding on polyp tissue (Madrepora oculata). Operculum and dorsal groove on foot indicated by arrow. 11. MSM16-3/GeoB 14873 (ROV7). Muscular foot enables elevation of body above substrate (live Lophelia pertusa). Epipodial sense organs spread directly below the shell (arrow). 12. MSM16-3/GeoB 14871 (ROV4). Feeding on apical portions of a live Madrepora oculata. 13. MSM16-3/GeoB 14779 (ROV2). Two individuals feeding on Lophelia pertusa tissue; note the grazing tracks showing the bare, white coral skeleton devoid of polyp tissue in contrast to the orange to pale-pinkish live portions. 14. MSM16-3/GeoB 14891 (ROV9). Three individuals of different sizes all feeding on epibionts of Lophelia pertusa framework; note the grazing traces on adjacent live Lophelia pertusa portions (see arrow). [Figs 9-20 were taken by ROV "Sperre", Tomas Lundälv, Sven Lovén Centre for Marine Infrastructure, Tjärnö, University of Gothenburg, Strömstad, Sweden].

FIGURE 8 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 8. Nennalpheus sibogae (De Man, 1910): A—female (cl 6.3 mm), from Madang, Papua New Guinea, MNHN-IU- 2014-6057, lateral view: B—ovigerous female (cl 7.7 mm) from Mayotte, Comoro Archipelago, FLMNH UF 13671, lateral view; C—male (cl 4.8 mm), from Madang, Papua New Guinea, MNHN-IU-2014-6016, dorsal view of anterior region [photographs by the author]; D, E—ovigerous female photographed in situ in Lembeh, Sulawesi, specimen not collected [photographs by Takako Uno and Stephen Wong].

FIGURE 7 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 7. Nennalpheus sibogae (De Man, 1910), ovigerous female (cl 8.2 mm) from Madang, Papua New Guinea, MNHN- IU-2014-6058: A—right cheliped with fingers closed, lateral view; B—same, mesial view; C—same, carpus and chela with fingers opened, mesial view; D—same, carpus, lateral view; E—same, cheliped fingers opened, ventromesial view; F—right second pereiopod, lateral view; G—right third pereiopod (dactylus tip missing, indicated by broken line), lateral view; H—same, propodus and dactylus (tip missing, indicated by broken line), lateral view; I—right fourth pereiopod, lateral view; J—right fifth pereiopod, lateral view; K—same, propodus and dactylus, lateral view; L—same, dactylus, lateral view.

FIGURE 6 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 6. Nennalpheus sibogae (De Man, 1910): ovigerous female (cl 8.2 mm) from Madang, Papua New Guinea, MNHN- IU-2014-6058 [A–L, O]; male (cl 5.5 mm) from Hansa Bay, Papua New Guinea, OUMNH.ZC. 2003.11.0017 [M, N]: A—frontal region, dorsal view; B—same, lateral view; C—fifth and sixth pleonites, right lateral view; D—telson, dorsal view; E—same, posterior margin (plumose setae omitted); F—right mandible, mesial view; G—right maxillule, lateral view; H—right maxilla, lateral view; I—right first maxilliped, lateral view; J—right second maxiliped, lateral view; K—right third maxilliped, lateral view; L—same, apex of ultimate article, dorsomesial (left) and lateral (right) views; M—right second pleopod, lateral view; N—same, appendix masculina and appendix interna; O—right uropod, dorsal view.

FIGURE 4 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 4. Nennalpheus gabonensis sp. nov., holotype, male (cl 8.4 mm) from Cape Esterias, Gabon, OUMNH.ZC. 2018.01.061: A—right second pereiopod, lateral view; B—right third pereiopod, lateral view; C—same, propodus and dactylus, lateral view; D—same, distal portion of propodus and dactylus, lateral view; E—right fourth pereiopod, lateral view; F—same, propodus and dactylus, lateral view; G—same, distal portion of propodus and dactylus, lateral view; H—right fifth pereiopod (dactylus missing, indicated by broken line), lateral view; I—same, propodus (dactylus missing, indicated by broken line), lateral view; J—left fifth pereiopod, distal portion of propodus and dactylus, lateral view.

FIGURE 1 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 1. Nennalpheus gabonensis sp. nov., holotype, male (cl 8.4 mm) from Cape Esterias, Gabon, OUMNH.ZC. 2018.01.061: A—frontal region, dorsal view; B—same, lateral view; C—posterior portion of cephalothorax and first three pleonites (left first and second pleopods removed), left ventrolateral view; D—median processes on first five (from left to right) pleonal sternites, left lateral view; E—fifth and sixth pleonites, right lateral view; F—telson, dorsal view; G—same, posterior margin (plumose setae omitted); H—left antennular flagellum, mesial view; I—right uropod, dorsal view.

FIGURE 5. A in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 5. A—Nennalpheus gabonensis sp. nov., holotype, male (cl 8.4 mm) from Cape Esterias, Gabon, OUMNH.ZC. 2018.01.061, living shrimp photographed in an aquarium soon after the collection [photograph by Patrick Louisy]; B, C—Habitat of Nennalpheus gabonensis sp. nov., silted reef with gorgonians, sponges and massive corals [photographs by Peter Wirtz].

FIGURE 3 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 3. Nennalpheus gabonensis sp. nov., holotype, male (cl 8.4 mm) from Cape Esterias, Gabon, OUMNH.ZC. 2018.01.061: A—right cheliped with fingers slightly opened, lateral view; B—same, mesial view; C—same, ischium, merus and carpus, lateral view; D—same, cheliped fingers closed, lateral view; E, F, G—same, cheliped fingers slightly opened, mesial (E), dorsomesial (F) and ventromesial (G) views.

FIGURE 2 in The alpheid shrimp genus Nennalpheus Banner & Banner, 1981 in the tropical eastern Atlantic, with description of a new species from Gabon and new records of N. sibogae (De Man, 1910) in the Indo-West Pacific (Malacostraca: Decapoda: Caridea)

FIGURE 2. Nennalpheus gabonensis sp. nov., holotype, male (cl 8.4 mm) from Cape Esterias, Gabon, OUMNH.ZC. 2018.01.061: A—right third maxilliped, lateral view; B—same, apex of ultimate article, dorsal (left) and mesial (right) views; C—left first pleopod, lateral view; D—same, endopod; E—left second pleopod, lateral view; F—same, appendix masculina and appendix interna.

FIGURE 6 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 6. Colour pattern in life of three Atlantic species of the genus Cinetorhynchus. A–B, C. gabonensis sp. n., oviger- ous female allotype. C, C. rigens (Gordon, 1936), UO-Mdr.2018.06.08, Madeira. D, C. manningi Okuno, 1996, Brazil. Photos: A, Thomas Menut; B, C, Peter Wirtz; D, Carlos Eduardo Ferreira.

FIGURE 5 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 5. Cinetorhynchus gabonensis sp. n., holotype male. A, fifth to eight thoracic sterna and bases on pereiopods 2–5. B, posterior end on sixth pleomere, and proximal parts of uropods, ventral view. C, first male pleopod, anterior aspect. D, second male pleopod, posterior aspect. E, same, appendices interna and masculina.

FIGURE 3 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 3. Cinetorhynchus gabonensis sp. n., holotype male, mouthparts (right side dissected). A, paragnaths, posteroventral view. B, mandible. C, same, incisor and molar processes, outer view. D, same, with palp, inner view. E, maxillula. F, maxilla. G, first maxilliped. H, second maxilliped. I, third maxilliped. A, unscaled.

FIGURE 4 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 4. Cinetorhynchus gabonensis sp. n., holotype male. A, left first pereiopod, lateral view. B, same, chela and distal carpus. C, left second pereiopod, lateral view. D, same, chela and distal carpus. E, third pereiopod, lateral. F, same, dactylus and distal propodus. G, fourth pereiopod. H, fifth pereiopod.

FIGURE 2 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 2. Cinetorhynchus gabonensis sp. n., holotype male. A, anterior carapace and rostrum, lateral view. B, anterior cephalothorax with left eye and appendages, dorsal. C, part of dorsal margin of rostrum with tegumental scales, lateral. D, detail of tegumental scales laterally on carapace. E, tegumental scale. F, left antennule, lateral. G, left antenna, ventral. H, sixth pleomere, telson, and left uropod, dorsal. I, distal end of telson, dorsal.

FIGURE 7 in Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

FIGURE 7. Phylogenetic position of Cinetorhynchus gabonensis sp. n. among Atlantic congeners resolved by Maximum Likelihood (ML) method based on the combined 16S and COI gene sequences (with a stenopodid species as outgroup). Maximum Likelihood bootstrap support and Bayesian posterior probabilities (ML/BI) expressed as percentages are indicated in nodes.

FIGURES 35–43. Calliostoma leptophyma. 35–37. HERMES2006 in Last snails standing since the Early Pleistocene, a tale of Calliostomatidae (Gastropoda) living in deep-water coral habitats in the north-eastern Atlantic

FIGURES 35–43. Calliostoma leptophyma. 35–37. HERMES2006/12, 35–36. H 1.0 mm, W 1.1 mm. 37. Protoconch W 0.59 mm, T 0.45 mm, scale bar 0.1 mm. 38. Moundforce2004/37, H 2.2 mm, W 2.3 mm, protoconch W 0.56 mm, T 0.43 mm. 39. HERMES2006/23A, H 2.9 mm, W 2.9 mm, protoconch W 0.57 mm, T 0.43 mm. 40. M151/GeoB 23434-4, live-collected, H 13 mm, W 14 mm. 41–43. Moundforce2004/41C, H 22 mm, W 23 mm.