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22 results for “Leucascus”
FIGURE 11 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 11. Leucascus roseus (MNRJ 5827, holotype). A, Triactine (left) and tetractine (right); B, Apical actine with spines (SEM).
FIGURE 10. Leucascus roseus. A in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 10. Leucascus roseus. A, Specimen alive (photo. E. Hajdu); B–F, MNRJ 5827, holotype. B, Preserved specimen; C, Cortical membrane; D, Spicules in the wall of a choanocyte tube; E, Apical actine of a tetractine projected into the lumen of a tube (arrow); F, Atrial membrane.
FIGURE 19. Ascoleucetta ventricosa. A–B in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 19. Ascoleucetta ventricosa. A–B, Preserved specimen (BMNH 1887.7.12.7(ii) (modified from Cavalcanti & Klautau 2011; Copyright permission 11035892); C, WAM Z40336; D–F, SAM S887. C, Transverse section showing the cortex (ct), choanocyte tubes and atrium (at); D, Cortical skeleton (SEM); E, Microdiactines (arrow) protruding into the lumen of an inhalant aperture (SEM); F, Microdiactines (SEM).
FIGURE 22 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 22. Ascoleucetta sagittata sp. nov. (ZMAPOR 13283, holotype). A, Choanosomal triactine (left) and tetractine (right); B, Apical actine of a tetractine (SEM).
FIGURE 16. Ascoleucetta compressa. A, C–F, BMNH 1924.9.1.3 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 16. Ascoleucetta compressa. A, C–F, BMNH 1924.9.1.3, holotype; B, WAM Z31421. A, Preserved specimen; B, Transverse section showing the cortex (ct), choanocyte tubes and atrium (at); C, Tangential section showing the cortical skeleton with large triactines around the inhalant apertures; D, Trichoxeas (arrow) protruding into the lumen of an inhalant aperture; E, Apical actine projected into the lumen of a tube; F, Atrial membrane.
FIGURE 8 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 8. Leucascus neocaledonicus (MNHN-LBIM-C-1999-02, holotype). A, Triactine (left) and tetractine (right); B, Apical actine of a tetractine (SEM).
FIGURE 4. Leucascus clavatus. A–C. NMV F42334. A in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 4. Leucascus clavatus. A–C. NMV F42334. A, Atrial membrane; B, Club-shaped diactine; C, Triactine (left) and tetractine (right); D, Apical actine with spines and ring (arrow; SEM) (NMV F42333).
FIGURE 13 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 13. Leucascus albus sp. nov (UFRJPOR 5252, holotype). A, Tetractine; B, Apical actine of a tetractine with spines (SEM).
FIGURE 3. Leucascus clavatus. A, Preserved specimens. NMV F42334 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 3. Leucascus clavatus. A, Preserved specimens. NMV F42334 (left) and WAM Z40143 (right); B, Diactines protruding from the sponge surface of the specimens NMV F42334 and WAM Z40143 (in detail). C–F. NMV F42334. C, Diactine inserted in the choanosome; D, Cortical membrane; E, Spicules in the wall of a choanocyte tube; F, Apical actine projected into the lumen of a choanocyte tube.
FIGURE 2 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 2. Leucascus simplex.: Dendyt\ 1892. A, Triactine (left) and tetractine (right) (syntype BMNH 1925.11.1.34); B, Apical actine of a tetractine (SEM) (syntype NMV F42418).
FIGURE 1 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 1. Leucascus simplex: Dendy 1892. A, Preserved syntype (NMV F42419); B, Transverse section showing the cortical membrane (arrow); C, Cortical membrane; D, Spicules in the wall of a choanocyte tube; E, Apical actine (arrow) projected into the lumen of a choanocyte tube; F, Atrial membrane.
FIGURE 9 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 9. Leucascus protogenes (BMNH 1925.11.1.29, neotype). A, Fragment of the preserved specimen; B, Cortical membrane; C, Triactines in the wall of a choanocyte tube; D, Cortical (left) and choanosomal (right) triactines.
FIGURE 12 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 12. Leucascus albus sp. nov (UFRJPOR 5252, holotype). A, Preserved specimen; B, Jagged microdiactine in the sponge surface (arrow); C, Cortical membrane; D, Apical actines with curved tips (in detail; arrow) projected into the lumen of a choanocyte tube; E, Atrial membrane; F, Triactine.
FIGURE 21 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 21. Ascoleucetta sagittata sp. nov. (ZMAPOR 13283, holotype). A, Fragment of the preserved specimen; B, Cortical membrane; C, Apical actine of tetractines projected into the lumen of a choanocyte tube; D, Atrial membrane; E, Sagittal triactine (arrow); F, Cortical triactine (arrow).
FIGURE 15 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 15. Leucascus flavus sp. nov (ZMAPOR 13145, holotype). A, Tetractine; B, Apical actine of a tetractine with spines (SEM).
FIGURE 6 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 6. Leucascus lobatus (ZMUCPOR-245, holotype). A, Cortical membrane; B, Transverse section showing the cortical membrane (arrow); C, Apical actine projected into the lumen of a choanocyte tube; D, Tripod (SEM); E, Triactine (left) and tetractine (right); F, Apical actine with spines (SEM).
FIGURE 7 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 7. Leucascus neocaledonicus (MNHN-LBIM-C-1999-02, holotype). A, Preserved specimen; B, Transverse section showing the cortex (ct), choanocyte tubes, and atrium (at); C, Cortical membrane; D, Apical actines projected into the lumen of a tube; E, Atrial membrane; F, Triactine.
FIGURE 18 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 18. Ascoleucetta amitsba. Schematic representation of the spicules (modified from Hôzawa 1929). A, Cortical triactines; B, Triactines of the choanocyte tubes; C, Tetractines of the choanocyte tubes; D, Atrial triactines; E, Atrial tetractines.
FIGURE 20 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 20. Ascoleucetta ventricosa (BMNH 1886.12.15.32, lectotype); A, Apical actine of a tetractine projected into the lumen of a choanocyte tube (arrow); B, Atrial membrane; C, Cortical triactine; D, Choanosomal triactine; E, Tetractine; F, Apical actine of a tetractine (SEM).
FIGURE 14 in Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species
FIGURE 14. Leucascus flavus sp. nov (ZMAPOR 13145, holotype). A, Preserved specimen; B, Cortical membrane; C, Apical actine of a tetractine projected into the lumen of a tube; D, Atrial membrane; E, Conical triactine; F, Slightly conical triactine.
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