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FIGURE 9 in Strongly carinate species of Alpheopsis Coutière, 1897 of the tropical Atlantic and eastern Pacific, with redescription of A. trigona (Rathbun, 1901) and description of three new species (Malacostraca: Decapoda: Alpheidae)

FIGURE 9. Alpheopsis paratrigona sp. nov., male holotype (cl 4.5 mm) from Portobelo, Caribbean coast of Panama (MZUSP 34222) [a]; male (cl 4.5 mm) from Carrie Bow Cay, Belize (ULLZ 8939) [b]. Photographs: A. Anker (a) and Darryl L. Felder (b).

FIGURE 16 in Strongly carinate species of Alpheopsis Coutière, 1897 of the tropical Atlantic and eastern Pacific, with redescription of A. trigona (Rathbun, 1901) and description of three new species (Malacostraca: Decapoda: Alpheidae)

FIGURE 16. Alpheopsis aristoteles sp. nov., male holotype (cl 3.9 mm) from São Tomé, São Tomé & Príncipe, Gulf of Guinea (MZUSP 34508): a—carapace, lateral; b—anterior region of carapace and frontal appendages, lateral; c—detail of pterygostomial angle, lateral; d—anterior region of carapace and frontal appendages, dorsal; e—posterior pleon, lateral; ftelson, dorsal; g—ventromesial tooth on first article of antennular peduncle, lateral; h—third maxilliped, lateral; i—same, tip of ultimate article, lateral; j—same, dorsomesial; k—second pereiopod, lateral; l—third pereiopod, lateral; m—fifth pereiopod, lateral; n—second pleopod, lateral; o—uropod, dorsal.

FIGURE 5 in Strongly carinate species of Alpheopsis Coutière, 1897 of the tropical Atlantic and eastern Pacific, with redescription of A. trigona (Rathbun, 1901) and description of three new species (Malacostraca: Decapoda: Alpheidae)

FIGURE 5. Alpheopsis paratrigona sp. nov., male holotype (cl 4.5 mm) from Portobelo, Caribbean coast of Panama (MZUSP 34222): a—carapace and anterior pleon, lateral; b—same, dorsal; c—anterior region of carapace and frontal appendages, lateral; d—same, dorsal; e—posterior pleon, lateral; f—telson, dorsal; g—ventromesial tooth on first article of antennular peduncle, lateral; h—third maxilliped, lateral; i—same, tip of ultimate article, mesial; j—second pleopod, lateral; k—uropod, dorsal.

FIGURE 1 in Strongly carinate species of Alpheopsis Coutière, 1897 of the tropical Atlantic and eastern Pacific, with redescription of A. trigona (Rathbun, 1901) and description of three new species (Malacostraca: Decapoda: Alpheidae)

FIGURE 1. Position of carinae (including crests and ridges) on the carapace and pleon used in this study: ABC—anterior branchiostegial carina; ASC—anterior subdorsal carina; CSR—crescent-shaped ridge; DLC—dorsal lateral carina; MDCmid-dorsal carina of carapace; MDC-PL1—mid-dorsal crest of pleomere 1; MDC-PL2—mid-dorsal crest of pleomere 2; PLC—posterior lateral carina; PSC—posterior subdorsal carina; VLC—ventral lateral carina. See text for more details.

FIGURE 2 in Strongly carinate species of Alpheopsis Coutière, 1897 of the tropical Atlantic and eastern Pacific, with redescription of A. trigona (Rathbun, 1901) and description of three new species (Malacostraca: Decapoda: Alpheidae)

FIGURE 2. Alpheopsis trigona (Rathbun, 1901), female (cl 5.5 mm) from Fort Pierce, Florida, USA (MZUSP 34221): acarapace and anterior pleon, lateral; b—same, dorsal; c—anterior region of carapace and frontal appendages, lateral; d—same, dorsal; e—posterior pleon, lateral; f—telson, dorsal; g—ventromesial tooth on first article of antennular peduncle, lateral; hthird maxilliped, lateral; i—same, tip of ultimate article, mesial; j—uropod, dorsal.

FIGURE 17 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 17. Microlaimus parviporosus sp. n., male, holotype. A, anterior end; B, total view; C, posterior end. Scale bars: A, C = 20 µm; B = 50 µm.

FIGURE 8 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 8. Caligocanna mirabilis, light micrograph. Female (specimen No. 6) in the tube of fine-grained ground particles attached to the grain of sand (the latter is marked with arrow). Scale bar = 100 µm.

FIGURE 7 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 7. Caligocanna mirabilis, males, light micrographs. A, specimen No. 1, head; B, specimen No. 1, region pharyngeal bulb; C, specimen No. 1, spermatogonia; D, specimen No. 1, anal region, optical section at level of gubernaculum (marked by arrow); E, specimen No. 1, longitudinal striation of cuticular annuli; F, specimen No. 3, anal region, optical section at level of distal part of spicule. Scale bars: A, B, D, F = 10 µm; C = 20 µm; E = 5 µm.

FIGURE 14 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 14. Microlaimus discolensis, specimen No. 1, male. A, anterior end; B, posterior end. Scale bars = 20 µm.

FIGURE 20 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 20. Microlaimus porosus, female, specimen No. 1. A, total view; B, head; C, tail. Scale bars: A = 50 µm; B, C = 20 µm.

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.