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12 results for “Hippothoidae”
FIGURE 10 in New Hippothoidae (Bryozoa) from Australasia
FIGURE 10. Four species of Hippothoa: A, D, Hippothoa pacifica Gordon (NIWA 98202), respectively showing an ovicellate zooid in lateral view with a pristine ooecium perforated by two elevated apical pores (the curved part of a rim seen between them), and dimorphic ovicellate orifice (apical pseudoporous mucro eroded) and autozooidal orifice; B, C, E, F, Hippothoa peristomata Gordon, respectively showing a frontal view of two autozooids (NIWA 94240), an ovicellate zooid (NIWA 94240), an autozooid in lateral profile (NIWA 120856) and a kenozooid (NIWA 94240); G, H, Hippothoa flagellum Manzoni (part NHMUK 97.5.1.793), autozooidal orifice and dimorphic female orifice; I, J, Hippothoa watersi Morris (NIWA 144795), autozooidal orifice and dimorphic female orifice. Scalebars: A, E, F, 200 μm; B, 300 μm; C, D, 100 μm; E, F, 200 μm; G–J, 20 μm.
FIGURE 12 in New Hippothoidae (Bryozoa) from Australasia
FIGURE 12. Antarctothoa cancer (Hutton) (NIWA 144802). En face view of autozooidal, female and male operculate orifices. Scalebar: 300 μm.
FIGURE 11 in New Hippothoidae (Bryozoa) from Australasia
FIGURE 11. Antarctothoa buskiana (Hutton) (NIWA 98922): A, disjunct ovicellate zooids and autozooids; B, male, female and autozooidal orifices; C, early astogeny. Antarctothoa cancer (Hutton) (NIWA 144802): D, ovicellate and non-ovicellate zooids; E, ancestrula and adjacent zooids; F, lateral profile of autozooidal orificial region; G, dimorphic female orifice showing proximal nick. Scalebars: A, D, 300 μm; B, F, 100 μm; C, E, G, 200 μm.
FIGURE 6. Neothoa bilderbacki n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 6. Neothoa bilderbacki n. sp., NIWA 132850 (holotype): A, B, en face views of autozooidal and ovicellate (dimorphic) orifices, respectively, tilted to show maximum lengths. Jessethoa ausubeli n. gen., n. sp., C–H (NIWA 132855), I, J (NIWA 132854, paratype): C, autozooids and zooeciules from proximal part of colony; D, elongate-oval ancestrula (middle zooid) with bipolar budding; E, oval ancestrula (at proximal end) with unipolar budding distalwards; F, close-up of ancestrula in E; G, another ancestrulate colony with bipolar budding (ancestrula lower middle); H, autozooids with frontal and laterally budded zooeciules; I, autozooidal orifice; J, zooids, mostly ovicellate, from crowded part of colony with frontal budding. Substratum darkened in D, E, H to show zooid outlines more clearly. Scalebars: A, B, 50 μm; C, D, 300 μm; E, J, 500 μm; F, 200 μm; H, 400 μm; I, 30 μm.
FIGURE 9. Antarctothoa ballia n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 9. Antarctothoa ballia n. sp., NIWA 144835: A, biserial phase of ancestrulate colony along red-algal axis; B, mature phase showing near-maximum spread; C, F, autozooids, ovicellate zooids and male zooids (♂), showing the varied size of males, the left-hand one in F also showing rare frontolateral adventitious buds; D, tilted view of dimorphic combined maternal aperture and autozooidal aperture en face; E, H, a form of early astogeny, with budding of two daughter zooids displaced leftwards, the one asterisked curving round the algal stem axis; G, tilted (en face) view of male orifices showing the relatively large sinus; I, lateral view of ancestrula and daughter zooids; note how ancestrular right-lateral orificial tubercle pertains to daughter zooid; J, conventional astogeny, with neither daughter displaced, and with small gap between them mid-distal of ancestrular orifice; right-lateral tubercle pertains to ancestrula, the left-lateral one to the left daughter zooid. Scalebars: A, B, 1 mm; C, E, F, H–J, 200 μm; D, G, 100 μm.
FIGURE 5. Plesiothoa gerroa n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 5. Plesiothoa gerroa n. sp., NIWA 122607 (paratype): A, ovicellate zooid showing lateral profile, with adjacent autozooids and zooeciules. Neothoa bilderbacki n. sp., holotype NIWA 132850: B, axial chain of autozooids with laterally budded ovicellate zooids; C, autozooid and laterally budded ovicellate zooid. Scalebars: A, B, 300 μm; C, 100 μm.
FIGURE 4. Plesiothoa gerroa n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 4. Plesiothoa gerroa n. sp., NIWA 132856 (paratype): A, less-crowded proximal part of colony; B, more-crowded distal part of colony with frontal budding; C, ovicellate (top), zooeciule and autozooidal orifices; D, spinose interior surface of proximal part of frontal shield of almost-developed autozooid at colony periphery; E, crenulated ancestrula and daughter zooid. Scalebars: A, 500 μm; B, 400 μm; C, D, 50 μm; E, 100 μm.
FIGURE 1. Hippothoa catophilia n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 1. Hippothoa catophilia n. sp., NIWA 132781 (holotype): A, lateral profile of a chain of three autozooids, each occupying the abfrontal surface of an internode of Costaticella solida; caudae are jointed where they cross the catenicellid joint; B, catenicellid internodes occupied by the hippothoid; the right-hand branch shows hippothoid autozooids (with umbones projecting rightwards) each budding a pair of ovicellate zooids leftwards to occupy the rest of the available space on the internode; C, close-up on an individual catenicellid internode bearing an autozooid at right and an ovicellate zooid at left (fz = female zooid); D, orifices of ovicellate female zooid (left, ov) and non-ovicellate autozooid (right); the pseudopore on each suboral umbo shows as a hole in the cleaned zooids. Background darkened in each image to show profiles of internodes and zooids clearly. Scalebars: A, 300 μm; B, 500 μm; C, 100 μm; D, 200 μm.
FIGURE 8. Antarctothoa pansa n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 8. Antarctothoa pansa n. sp., A (NIWA 144800), B–G (NIWA 92636, paratype): A, ancestrulate linear colony (damaged) prior to distal expansion; B, autozooids, ovicellate zooids and two male zooids (far right) in expanded part of mature colony; C, operculate orifices of ovicellate zooid, autozooid and male zooid; D, ancestrula with early astogeny; E–G, polymorphic autozooidal, male and ovicellate orifices, respectively (the latter surrounded by diatoms). Scalebars: A, 2 mm; B, 500 μm; C, 200 μm; D, 100 mm; E, 30 μm; F, 10 μm; G, 50 μm.
FIGURE 3. Plesiothoa densa n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 3. Plesiothoa densa n. sp., NIWA 132848 (paratype): A, autozooidal, female and zooeciule orifices; B, ancestrula. Plesiothoa gerroa n. sp., NIWA 132856: C, distally budded autozooids with filiform caudae (right, one orifice arrowed), laterally budded autozooids, an ovicellate zooid and zooeciules. Scalebars: A, B, 100 μm; C, 200 μm.
FIGURE 2. Hippothoa catophilia n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 2. Hippothoa catophilia n. sp., NIWA 132781 (holotype): A, a pair of ovicellate zooids showing the apical ooecial pseudopore(s); B, early astogeny, showing a kenozooidal ancestrula (an), which has directly budded two ovicellate zooids (part of one at lower left and another to the right) and two autozooids (middle left and distal); the distal zooid has also budded an ovicellate zooid. Plesiothoa densa n. sp., NIWA 132848 (paratype): C, hippothoiform autozooids, plus zooeciules and ovicellate zooids; D, a more-crowded part of the paratype. Background darkened in A, B, D to show profiles of internodes and/or zooids clearly. Scalebars: A–C, 200 μm; D, 500 μm.
FIGURE 7. Jessethoa ausubeli n. gen., n in New Hippothoidae (Bryozoa) from Australasia
FIGURE 7. Jessethoa ausubeli n. gen., n. sp., A, D (NIWA 132855), B, C, E (NIWA 132854, paratype): A, operculate autozooid with frontal zooeciule, also operculate; B, varied zooid types in crowded part of colony; notice circular primary orifice of female zooid beneath broken ooecium; C, ovicellate zooid; note the density of pseudopores in both the female frontal shield and the ooecium; D, closeup of bipolar ancestrula in fig. 6G; E, sequential budding of elongate zooeciules [the dark lines with two zooid openings pertain to the ctenostome bryozoan Immergentia zelandica Silén, 1946]. Scalebars: A, C, D, 100 μm; B, 300 μm; E, 500 μm.
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