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30 results for “Cribrilinidae”
FIGURE 11. Juxtacribrilina dobrovolskii n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 11. Juxtacribrilina dobrovolskii n. sp. (A–E) Holotype, ZIRAS 01/50733-A, Shikotan I., Lesser Kuril Chain. A. Colony, showing high frequency of ovicellate zooids in basal layer and scattered dwarf zooids in colony center. B. Ovicellate and non-ovicellate zooids near colony margin; arrowheads, frontal pore chambers forming in developing zooid. C. Ovicellate and two non-ovicellate zooids; ovicellate zooids with labiate flanges proximal and distal to orifice. D. Central region of colony, with ovicellate and non-ovicellate zooids in basal layer and numerous frontal dwarf zooids; arrowhead, dwarf zooid budding from frontal pore chamber. E. Frontal dwarfs; note variation in ooecial pseudopores and in frontal shield; arrowhead, compact frontal shield with tapering costae and sutures evident between costae; arrow, reticulate frontal shield. F. Paratype, ZIRAS 01/50733-B, ancestrula and periancestrular zooids. Scale bars: A, 1 mm; B, 500 µm; C–F, 250 µm.
FIGURE 7. Juxtacribrilina ezoensis n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 7. Juxtacribrilina ezoensis n. sp., ZIRAS 01/50734, Bering Island, Commander Islands, intertidal. A. View of colony. B. Colony margin, showing non-ovicellate zooids and one young, basally budded marginal dwarf zooid with developing kenozooidal ooecium with distal pore chamber. C. Frontally budded dwarf zooids overlying non-ovicellate zooids in basal layer. D. Ancestrula and periancestrular zooids. Scale bars: A, 1 mm; B–D, 250 µm.
FIGURE 8. Juxtacribrilina ezoensis n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 8. Juxtacribrilina ezoensis n. sp., YPM-IZ-106556, Ketchikan, Alaska; intertidal. A. Colony, with frontally budded dwarf zooids toward center and basally budded dwarfs at margin (arrows). B. Non-ovicellate zooids in basal layer and reduced marginal ovicellate zooid. C. Frontal dwarfs, with three (arrow) or four (arrowheads) costae. D. Marginal reduced and dwarf ovicellate zooids. E. Dwarf zooid, showing developing ooecium; note lateral pore chambers. F. Dwarf zooid, showing ooecium; note proximo-lateral pore chamber. Scale bars: A, 500 µm; B, D, 250 µm; C, 150 µm; E, F, 100 µm.
FIGURE 9. Juxtacribrilina pushkini n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 9. Juxtacribrilina pushkini n. sp., Ketchikan, Alaska; A, D, holotype, YPM-IZ-100361; B, C, paratype, YPM-IZ- 100481. A. Non-ovicellate zooids in basal layer; every zooid bearing one or two frontal pore chambers on proximal gymnocyst. B. Non-ovicellate and three ovicellate zooids in basal layer; large arrowheads, zooids with non-budding distal pore chamber; small arrowheads, "folds" seen in modified latero-oral spines contributing to ooecial complex; arrow, zooid with distal pore chamber contributing to next zooid. C. Reduced ovicellate zooid (center) at colony margin. D. Part of colony, showing densely packed dwarf zooids in colony center. Scale bars: A–C, 250 µm; D, 500 µm.
FIGURE 6. Juxtacribrilina ezoensis n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 6. Juxtacribrilina ezoensis n. sp., subtidal, Akkeshi Bay, Japan. A, E, F, holotype, YPM-IZ-106549; B, paratype, YPM-IZ-106551; C, YPM-IZ-106552; D, paratype, YPM-IZ-106550. A. Portion of colony showing narrow marginal zone of reduced ovicellate zooids in basal layer, including several dwarfs. B. Colony with frontal dwarf zooids crowded in center; ovicellate zooid in primary layer at upper right. C. Frontal dwarf zooids with two, three, or four costae in frontal shield. D. Distal pore chamber of ovicellate zooid in basal layer (in distal view), showing pores in transverse wall (arrowheads) and pore in chamber roof leading to ooecial cavity (arrow); asterisk, ooecium. E. Zooid in basal layer showing developing ooecium; arrow, location of distal pore chamber of maternal zooid (out of view below base of ooecium), from which distal zooid is budding. F. Enlargement from E, showing ooecial cavity, with pore (arrow) at bottom leading to basal pore chamber; asterisk, ectooecium; arrowhead, entooecium. Scale bars: A, B, 500 µm; C, 250 µm; D, E, 50 µm; F, 30 µm.
FIGURE 1 in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 1. SEM images of ovicellate zooids in Juxtacribrilina species showing measurements taken for the ooecial complex. A. Juxtacribrilina ezoensis n. sp., ovicellate zooid in basal layer. B. Juxtacribrilina pushkini n. sp., two frontally budded dwarf ovicellate zooids. OCL, OCW, length and width of ooecial complex, including ooecium and modified lateral-oral spines meeting at midline to form wide border proximal to ooecium; OeL, OeW, length and width of ooecium; OrL, OrW, length and width of the secondary orifice; ZL, ZW, zooid length and width.
FIGURE 5. Juxtacribrilina ezoensis n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 5. Juxtacribrilina ezoensis n. sp., subtidal, Akkeshi Narrows, Japan; paratype, YPM-IZ-106550. A. Part of colony, showing ovicellate and non-ovicellate zooids in basal layer. B. Ovicellate and non-ovicellate zooids in basal layer; arrowheads, ovicellate zooids that have budded next zooid from distal pore chamber; arrow, ovicellate zooid with non-budding distal pore chamber. C. Oblique view of ovicellate zooids in basal layer, showing labiate flanges proximal and distal to orifice. D. Enlargement of ovicellate zooid in basal layer. E. Multiporous frontal pore chamber on tapering zone of proximal gymnocyst. F. Ancestrula and periancestrular zooids; note dwarf zooids beginning to develop from frontal pore chambers (arrowheads). Scale bars: A, 1 mm; B, C, 500 μm; D, 100 μm; E, 50 μm; F, 250 µm.
FIGURE 4. Juxtacribrilina ezoensis n in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 4. Juxtacribrilina ezoensis n. sp., intertidal, Akkeshi Bay, Japan; A, paratype, NHM 2006.2.27.50; B, paratype, YPM- IZ-106553; C, D, F, paratype, YPM-IZ-106554; E, paratype, YPM-IZ-106555. A. Non-ovicellate zooids in basal layer, showing presence of three or four oral spines and one or two frontal pore chambers on proximal gymnocyst. B. Non-ovicellate zooids in basal layer, showing ubiquitous frontal pore chambers highlighted in white due to electron charging. C. Colony with numerous frontally budded and four marginal (arrowheads) dwarf zooids. D. Dwarf zooids, with three (arrowheads) or four (arrows) costae in frontal shield. E. Dwarf zooid arising from frontal pore chamber. F. Colony margin, showing non-ovicellate zooids in basal layer, and frontal and marginal dwarf zooids. Scale bars: A, D, F, 250 µm; B, 500 µm; C, 1 mm; E, 200 µm.
FIGURE 3 in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 3. Juxtacribrilina annulata (Fabricius, 1780). Chupa Inlet, Kandalaksha Bay, White Sea; A–D, F, ZIRAS 33/50736; E, from study by Ostrovsky (1998). A. View of colony; ancestrula indicated by arrow. B. Non-ovicellate zooids in basal layer. C. Non-ovicellate and marginal ovicellate zooids in basal layer. D. Enlargement of ovicellate zooid in basal layer, showing details of ooecium. E. Detached colony fragment with two frontally positioned dwarf ovicellate zooids and a reduced marginal ovicellate zooid (right); arrowhead indicates cylindrical proximal 'cauda' of dwarf zooid apparently arising from distal pore chamber of basal zooid. F. Ancestrula (center) and periancestrular zooids. Scale bars: A, 1 mm; B, C, E, F, 250 µm; D, 100 µm.
FIGURE 2 in The "Cribrilina annulata" problem and new species of Juxtacribrilina (Bryozoa Cheilostomata: Cribrilinidae) from the North Pacific
FIGURE 2. Juxtacribrilina annulata (Fabricius, 1780), ZIRAS 32/50735, western Kamchatka shelf, Sea of Okhotsk. A. View of colony, showing non-ovicellate and ovicellate zooids in basal layer; arrow, uncommon ovicellate zooid in basal layer with distal autozooid in columnar series. B. Non-ovicellate zooids. C. Two ovicellate zooids in basal layer; lower zooid with long cauda proximal to frontal shield; arrow, enlargement of position indicated by arrow in panel A; small arrowhead, subterminal lumen pseudopore. D. Ovicellate and non-ovicellate zooids in basal layer, with interzooidal bud (arrowhead) that will presumably give rise to frontally positioned dwarf ovicellate zooid. E. Frontally positioned reduced ovicellate zooids; these are not fully reduced dwarf zooids. F. Reduced ovicellate zooid arising from interior of damaged zooid in basal layer. Scale bars: A, 1 mm; B, 500 µm; C–F, 250 µm.
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