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7 results for “Powellitheca”
Fig. 4 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 4. Powellitheca waipukurensis (Waters, 1887) comb. nov. NHMUK BZ 7744, Nukumaruan, Pleistocene, Nukumaru Limestone, Waiinu Beach. Two colonies of P. waipukurensis encrusting a bivalve shell, competing with other bryozoan species for space. Note the band of fertile zooids with large, globular ovicells.
Fig. 6 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 6. Powellitheca waipukurensis (Waters, 1887) comb. nov. Nukumaruan, Pleistocene, Nukumaru Limestone, Waiinu Beach. A–F. NHMUK BZ 7744. A. General view of two colonies encrusting a bivalve shell. B. Fusion of the two colonies shown in A and formation of kenozooids along the encountering edge. C. Group of fertile zooids and autozooids. D. Ancestrula and early ontogeny. E. Close-up of the minimally calcified ancestrula. F. Autozooidal orifice and avicularium. — G–H. NHMUK BZ 7745. G. Internal view of the proximal, convex, orificial rim lacking a lyrula. H. Multiporous septula on the zooidal vertical walls. Scale bars: A = 1 mm; B = 500 µm; C–D = 200 µm; E–F = 100 µm; G–H = 20 µm.
Fig. 3 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 3. Powellitheca labiosa gen. et sp. nov. NIWA 98320 (A–C, E–F), 98229 (D), Recent, Three King Islands, New Zealand. A. Group of fertile zooids and autozooids. B. Tilted view of the primary orifice of an autozooid. Note the lack of a lyrula. C. Close-up of the frontal, multiporous septula on the distolateral corners and the funnel-shaped pseudopores on the frontal shield. D. Lateral, multiporous septula on the zooidal vertical walls. E–F. Tilted view of the orifice of fertile zooids. Scale bars: A = 500 µm; B–C = 100 µm; D = 200 µm; E = 250 µm; F = 150 µm.
Fig. 2 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 2. Powellitheca terranovae gen. et sp. nov. NIWA 98983, Recent, Stephens Hole, NZOI Station Q686, New Zealand. A. Group of fertile zooids and autozooids. B. Close-up of an autozooid showing frontal, multiporous septula on the distolateral corners. C. Lateral, multiporous septula on the vertical walls of a maternal zooid. Note also the prominent, suboral umbo. D. Avicularium. E. Tilted view of an autozooidal orifice to show the anvil-shaped, downwardly directed lyrula. F. Orifice of a maternal zooid and incomplete ooecium. Scale bars: A = 250 µm; B–C = 100 µm; D–E = 50 µm; F = 150 µm.
Fig. 1 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 1. Emballotheca quadrata (MacGillivray, 1880), NHMUK 1897.5.1.830, Recent, Port Phillip Heads, Victoria, Australia. A. General view of the colony. B. Autozooidal orifice and avicularia. C. Close-up of a condyle with scaled tip. D. Fertile zooid and surrounding autozooids. E. Large, spatulate, frontal avicularium and lateral pore-chamber windows in the vertical walls. Scale bars: A = 500 µm; B = 40 µm; C = 10 µm; D = 200 µm; E = 100 µm.
Fig. 5 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 5. Powellitheca waipukurensis (Waters, 1887) comb. nov. Specimen figured by Brown (1952: fig. 203), NHMUK D36986, Mangapanian, Early Pliocene, Hawkes Bay, Waipukurau Gorge. A. General view of the colony. B. Group of autozooids and fertile zooids showing the dimorphic orifices. C. Group of zooids with avicularia. D. Autozooids. Scale bars: A = 500 µm; B–C = 200 µm; D = 100 µm.
Fig. 7 in On Powellithecidae fam. nov., a new Pliocene to Recent bryozoan family endemic to New Zealand, with the description of Powellitheca gen. nov. (Bryozoa, Cheilostomata)
Fig. 7. Powellitheca terranovae gen. et sp. nov. Underwater photograph taken by Dr. Vincent Zintzen (Department of Conservation, NZ) at the Poor Knights Islands, off the NE coast of North Island, north of Auckland, New Zealand. Note the band of yellow pigment at the colony's growing edges and the 19 yellow tentacles of the autozooids.
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