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37 results for “Plakinidae”
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 5 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 5. Epithelial cells of Oscarella malakhovi sp. nov. A) SEM micrograph of choanocytes. B) TEM micrograph of choanocytes (Ch), lined by a basement membrane, and apopylar cell (AC). C) SEM micrograph of apopylar cell, choanocytes and vacuolar cell (VC). D) SEM micrograph of endopinacocytes (En) and symbiotic bacteria (B) in the mesohyl. E) TEM micrograph of endopinacocytes (En). F) SEM micrograph of exopinacocytes (Ex) and vacuolar cell (VC).
FIGURE 1 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 1. Location of the collection sites of Oscarella malakhovi sp. nov. in the Gulf of the Peter of Great, Vostok Bay (Pacific Ocean, Japan Sea). The circles indicate the exact collecting sites.
FIGURE 4 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 4. The anatomical structures of Oscarella malakhovi sp. nov. A) Light microscopy micrograph, showing the external part of sponge with the ectosome. B) SEM micrograph, showing the ostium, inhalant canal, exopinacoderm and choanocyte chambers distribution. C) SEM micrograph, showing the choanocyte chamber and apopyle. D) SEM micrograph, showing the exopinacoderm with the ostia arrangements. Abbreviation: Ap — apopyle; CC — choanocyte chamber; Ex — exopinacoderm; Ic — inhalant canal; O — ostium.
FIGURE 3 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 3. General anatomy of Oscarella malakhovi sp. nov. A) Light microscopy micrograph, showing the arrangement of choanocyte chambers (CC) around exhalant canals, the large basal cavities (BC), and the embryous (E). B) SEM micrograph, showing the arrangement of ostia (O) on the exopinacoderm (Ex), inhalant canals (Ic), the larva (L), and the embryous (E).
FIGURE 7 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 7. Endosimbiotic bacteria of Oscarella malakhovi sp. nov. A) TEM micrograph of bacteria type B1 and B2. B) SEM micrograph of bacteria type B1 and B2.
FIGURE 8 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 8. Buds of Oscarella malakhovi sp. nov. A) Photograph of a budding sponge. B) Photograph of the buds. The arrows show the buds.
FIGURE 6 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 6. The cells of the mesohyl in Oscarella malakhovi sp. nov. A, B) TEM micrographs of archaeocytes. C) TEM micrograph of granular cell. D) TEM micrograph of vacuolar cells. Abbreviations: B — symbiotic bacteria; G — granule; N — nucleus; Nu — nucleolus; Ph — phagosome; V — vacuole.
FIGURE 2 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
FIGURE 2. External morphology of Oscarella malakhovi sp. nov. A) Photograph of a large specimen taken at 0.5 m depth on the stone, where is clearly visible the characteristics lumpy, microlobate surface. B) Photograph of a small specimen taken at 3 m depth on the shell of bivalve. The arrows show the sponge.
FIGURE 5 in Four new species of Plakinidae (Porifera: Homoscleromorpha) from Brazil
FIGURE 5. Plakinastrella globularis sp. nov.: A, holotype (MNRJ 5980) preserved in ethanol; B, tangential section of the ectosome; C, transverse section of ectosome and choanosome; D, ectosomal palisade of small diods.
FIGURE 4 in Four new species of Plakinidae (Porifera: Homoscleromorpha) from Brazil
FIGURE 4. Plakortis potiguarensis sp. nov.: A, preserved holotype (UFPEPOR 585); B–C, tangential sections of ectosomal skeleton; D, transverse section of ectosome and choanosome; E, diod (top) and triod (bottom); F, non-tuberculate microrhabds (E–F, SEM).
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