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18 results for “Plakina”
FIGURE 2 in New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles)
FIGURE 2. Photos taken using light (A, B) and scanning electron (C-I) microscopy of Plakina doudou sp. nov. skeleton. A) transversal section of the skeleton. B) Focus on the skeleton, showing the surface, exhalant canal, embryo and basal cavity. C) Diods. D) Triod. E) Calthrop. F) Monolophose triods. G) Monolophose calthrops. H) Dilophose calthrops. I) Trilophose calthrops. bc: basal cavity; ec: exhalant canal; em: embryo; s: surface.
FIGURE 4 in New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles)
FIGURE 4. Transmission electron micrographs: A) Choanocyte chamber (cc). B) Focus on the limit between two choanocyte chambers. C) Apopylar cell (Ap). D) Exopinacocyte. E) Endopinacocyte. F) Symbiotic bacteria (b). Ch: choanocyte; ec: exhalant canal; fl: flagellum; in: inclusions; M: mesohyl; N: nucleus; Pi: pinacocyte; sp: hole left by spicule.
FIGURE 1 in New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles)
FIGURE 1. External morphology and color variation of Plakina doudou sp. nov. A) in situ photo showing Plakina doudou sp. nov. (1) living in syntopy with Plakina arletensis (2) and Tetralophophora mesoamericana (3). B) Focus on in situ specimens of Plakina doudou sp. nov. C) Same specimen after fixation in alcohol.
FIGURE 5 in New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles)
FIGURE 5. Phylogenetic relationships of Homoscleromorpha species using a 492 bp fragment (I3M11) of the cytochrome oxidase I. Bootstrap values correspond to neighbor-joining (1000) and maximum likelihood (100) analysis.
FIGURE 9. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 9. Plakina atka n. sp. Tetralophose calthrops, all rays tetrafurcate, points of rays microfurcate.
FIGURE 7. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 7. Plakina atka n. sp. Thick category of diods with central spines. Probably derived from spined triods through reduction of one ray.
FIGURE 10. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 10. Plakina atka n. sp. Microfurcate end of ray from a tetraloph, tetrafurcate lophocalthrops.
FIGURE 6. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 6. Plakina atka n. sp. Smooth diods, smooth triods and, thicker triods with strongly spined bases of rays.
FIGURE 4. Plakina tanaga n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 4. Plakina tanaga n. sp. Trilophose calthrops with tetrafurcate lophose rays and biforked nonlophose ray.
FIGURE 1. Plakina tanaga n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 1. Plakina tanaga n. sp. In situ in Little Tanaga Strait at 146m depth encrusting a vertical bedrock wall with numerous other invertebrates. Width of photo approx. 38 cm.
FIGURE 3 in A new cave-dwelling species of Plakina (Porifera: Homoscleromorpha) from Crete, Greece (South Aegean Sea)
FIGURE 3. Spicules of Plakina strongylata sp. nov. (SEM). A, monolophose calthrops. B, dilophose calthrops. C, trilophose calthrops. D, tetralophose calthrops. E, irregular spicules.
FIGURE 2 in A new cave-dwelling species of Plakina (Porifera: Homoscleromorpha) from Crete, Greece (South Aegean Sea)
FIGURE 2. Spicules of Plakina strongylata sp. nov. (SEM). A, calthrops. B, monolophose diods. C, dilophose diods. D, monolophose triods. E, dilophose triods. F, trilophose triods.
FIGURE 1 in A new cave-dwelling species of Plakina (Porifera: Homoscleromorpha) from Crete, Greece (South Aegean Sea)
FIGURE 1. Plakina strongylata sp. nov. A–B, living specimens in situ (os, oscules). C, transverse section of the whole sponge body (bc, basal cavities; ch, choanosome; em, embryos; s, surface). D, ectosome in transverse section (ls, lophose spicules). E, diods. F, detail of the extremities of diods. G, triods (E–G, SEM).
FIGURE 8. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 8. Plakina atka n. sp. Spined calthrops with reduced 4.ray, all rays with basal spines.
FIGURE 5. Plakina atka n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 5. Plakina atka n. sp. Holotype encrusting a cobble. Tick marks on grid equal 1 cm.
FIGURE 3. Plakina tanaga n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 3. Plakina tanaga n. sp. Weakly spined triods and trilophose calthrops.
FIGURE 2. Plakina tanaga n in Two new species of Plakina Schulze, 1880 (Porifera, Plakinidae) from the Aleutian Islands (Alaska, USA)
FIGURE 2. Plakina tanaga n. sp. Smooth oxeas, triods and calthrops and trilophose.
FIGURE 3 in New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles)
FIGURE 3. General organization of the tissue of Plakina doudou sp. nov. A) Semi-thin section showing two cinctoblastula embryos. B–D) Choanosome. E) Cinctoblastula embryo. F) Close-up of the cinctoblastula embryo. F) Transmission electron micrograph of the embryo. bc: basal cavity; bm: basement membrane; cav: central cavity; cc: choanocyte chamber; Ch: choanocyte; ciC: ciliated cells; cil: cilia; ec: exhalant canal; em: embryo; endo: endopinacoderm; exo: exopinacoderm; Fo: follicular cells; M: mesohyl; N: nucleus; NI: unidentified bodies. Oo: oocyte; Pi: flagellated endopinacocyte; sp: hole left by spicule; V: vitellus.
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