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14 results for “Rossella”
FIGURE 7 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 7. Spicules of Rossella racovitzae Topsent, 1901. A, mesodiscohexaster of SMF 11877, B, microdiscohexaster of SMF 11878, C, microdiscohexaster of SMF 11729, D, complete ray of calycocome of SMF 11871, E, complete ray of calycocome with microdiscohexaster between its secondary rays from SMF 11895, F, fragmentary calycocome of SMF 11891. Some representatives of rather unusual spicule shapes: G, calycocome of SMF 11736, rays in front and back are missing, H, complete ray of calycocome of SMF 11736, I, microdiscohexaster of SMF 11736, J, mesodiscohexaster of SMF 11889, K, complete ray of calycocome of SMF 11889. Spicules of R. vanhoeffeni armata Schulze & Kirkpatrick, 1910 (ZMH S2932) for comparison: L, microdiscohexaster, scale bar 10 µm, M, complete ray of calycocome, scale bar 10 µm.
FIGURE 6 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 6. Spicules of Rossella nuda Topsent, 1901 (SMF 11715). A, microdiscohexaster, B, isolated ray of microdiscohexaster, C–D, mesodiscohexasters, E, oxyhexaster, F–G, complete rays of calycocomes.
FIGURE 5 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 5. Spicules of Rossella levis (Kirkpatrick, 1907), SMF 11728. A, complete calycocome, one ray hidden, B, isolated complete ray of calycocome, C, oxyhexactin, D, center of microdiscohexaster with all discoidal endings broken off, E, complete microdiscohexaster, lying on a pile of scleres, F, hemioxyhexaster.
FIGURE 4 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 4. Spicules of Rossella fibulata Schulze & Kirkpatrick, 1910: A–E SMF 11906, F–I ZMH S2931. A, mesodiscohexaster with microdiscohexasters, B, microdiscohexaster, C, heterodiactin, D–E, close-ups of heterodiactin centres, F–G, heterodiactins, scale bars 100 µm, H–I: calycocome fragments.
FIGURE 3 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 3. Spicules of Rossella antarctica Carter, 1872 (SMF 11921): A, common calycocome, B, calycocome with lateral bumps on the primary rays, C, calycocome with secondary rays in a developing stage, D–E, additional large calycocomes, F, microdiscohexaster.
FIGURE 2 in Hexactinellida of the genus Rossella, of ANT XXIV / 2 (SYSTCO I) Expedition—Antarctic Eastern Weddell Sea
FIGURE 2. Habitus-pictures of Rossella spp. A–B, Rossella antarctica, A lateral view (SMF 11913) with spicular fringe visible at the top, B, section (SMF 11921). C, Rossella fibulata, SMF 11906. D, Rossella levis (SMF 11728) photographed ex situ on board RV Polarstern. E, Rossella nuda (SMF 11715) photographed ex situ on board RV Polarstern. F, Rossella racovitzae (SMF 11871) with specimen of Tetilla leptoderma attached, photographed ex situ on board RV Polarstern. G, Rossella vanhoeffeni armata (ZMH S 2932).
FIGURE 1 in Rossella podagrosa Kirkpatrick, 1907 — A valid species after all
FIGURE 1. Habit of Rossella podagrosa. A: Clean colony of strongly budding R. podagrosa, used by some comatulids as substrate. Scale bar: 10 cm. B: Close-up of R. podagrosa covered with sediment. Scale bar: 10 cm. C: Ground covered by dense mass of R. podogrosa, mostly concealed by sediment. Two clean specimens of R. cf. levis grow over the R. podagrosa-ground. Scale bar: 20 cm. D: Assemblage of large R. podagrosa coverage and one specimen of R. antarctica (to the upper left). Scale bar: 20 cm. E: Type of R. podagrosa (BMNH 1908.2.5.6). Scale bar: 50 mm.
FIGURE 2 in Rossella podagrosa Kirkpatrick, 1907 — A valid species after all
FIGURE 2. Spicules of R. podagrosa. A–C: Specimen P1635, A: Calycocom, scale bar 30 µm, B: Mesodiscohexaster, scale bar 30 µm, C: Microdiscohexaster, scale bar 10 µm. D–F Specimen BMNH 1908.2.5.6 (type), D: Calycocom, scale bar 30 µm, E: Mesodiscohexaster, scale bar 30 µm, F: Microdiscohexaster, scale bar 10 µm.
FIGURE 5 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 5. Nodastrella asconemaoida sp. nov. ZMAPOR 19715, skeleton. Scanning electron micrographs. (A) Microdiscohexaster. (B) Oxyhexaster.
FIGURE 2 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 2. Nodastrella nodastrella holotype, skeleton. Scanning electron micrographs. (A) Calycocome. (B) Atrial hexactin. (C) Pappocome-like oxyhexaster with most secondary rays broken off. (D) Regular oxyhexaster. (E) Discaster.
FIGURE 3 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 3. Nodastrella asconemaoida sp. nov. USNM 1150045, specimen (A) and skeleton (B–H). (B, C, E, F) scanning electron micrographs; (D, G, H) light micrographs. (A) Deck photograph of specimen. (B) Dermal stauractin. (C) Atrial hexactin. (D) Dermal tauactin. (E) Microdiscohexaster. (F) Oxyhexaster. (G) "Calycocome" with numerous secondary rays and hardly developed calyces (= calycocome-like stellate discohexaster) (40X). (H) "Proper" calycocome with fewer secondary rays and well-developed calyces (40X).
FIGURE 6 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 6. Maximum likelihood phylogram of Rossellidae inferred from concatenated 18S, 28S, 16S, and COI sequences using mixed models (see Methods for details). Outgroups (Oopsacas minuta + Leucopsacus sp.) omitted for clarity. The alignment has 4110 bp, 686 distinct alignment patterns, and 7.84% gaps. Bootstrap proportions are given at nodes; the values are based on 100 pseudoreplicates as determined by the autoMRE bootstopping criterion (Pattengale et al. 2010). Scale bar indicates expected number of substitutions per site. Previously unpublished specimens highlighted in boldface. The alignment and the tree have been deposited in TreeBASE under Study-Nr. 12795.
FIGURE 1. Nodastrella nodastrella USNM 1150046 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 1. Nodastrella nodastrella USNM 1150046, specimen (A) and skeleton (B–G). (B–E, G) scanning electron micrographs; (F) light micrograph. (A) Deck photograph of specimen attached to Lophelia coral. (B) Dermal stauractin. (C) Detail of calycocome. (D) Cluster of calycocomes and a discaster (lower left). (E) Pappocome-like oxyhexaster with most secondary rays broken off. (F) Complete pappocome-like oxyhexaster. (G) Discaster.
FIGURE 4 in Integrative taxonomy justifies a new genus, Nodastrella gen. nov., for North Atlantic " Rossella " species (Porifera: Hexactinellida: Rossellidae)
FIGURE 4. Underwater picture of Nodastrella asconemaoida sp. nov. HBOI 5-VIII-05-1-004, taken by Johnson-Sea-Link II on Miami Terrace, Straits of Florida, Reed Site BU2, August 05, 2005. Courtesy of HBOI, Ft. Pierce, Florida. Right specimen is ca. 22 cm tall.
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