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37 results for “Medusozoa”
FIGURE 2 in Literature analysis and present state of knowledge of benthic Medusozoa (Cnidaria) from the Bay of Biscay and nearby areas (northeastern Atlantic), with emphasis on biodiversity
FIGURE 2. Numbers of taxonomic papers on Bay of Biscay Medusozoa published per decade, and accumulative curve. The latter has in recent years been reaching a plateau. (PhD and MSc theses dealing with taxonomy have been included).
FIGURE 1 in Literature analysis and present state of knowledge of benthic Medusozoa (Cnidaria) from the Bay of Biscay and nearby areas (northeastern Atlantic), with emphasis on biodiversity
FIGURE 1. Area of study, showing different administrative territories. Bretagne (Brittany): A, Finistère; B, Morbihan. Pays de la Loire: C, Loire-Atlantique; D, Vendée. Poitou-Charentes: E, Charente-Maritime. Aquitaine: F, Gironde; G, Landes; H, Pyrénées-Atlantiques. Euskadi: I, Guipúzcoa; J, Vizcaya. Cantabria: K. Asturias: L. Galicia: M, Lugo; N, La Coruña; O, Pontevedra. (Portugal border is not shown).
FIGURE 5 in Literature analysis and present state of knowledge of benthic Medusozoa (Cnidaria) from the Bay of Biscay and nearby areas (northeastern Atlantic), with emphasis on biodiversity
FIGURE 5. Numbers of papers from Bay of Biscay literature in which every species has been mentioned, numbers of times that every species has been recorded. Each sampling station, even in the same paper, has been considered a different record.
Data from: A new tetraradial olivooid (Medusozoa) from the Lower Cambrian (Stage 2) Yanjiahe Formation, South China
<p><em>Octapyrgites elongatus n. gen. n. sp.</em>, a relatively rare, tetraradial olivooid (Cnidaria, Medusozoa), is described from Bed 5 of the Yanjiahe Formation (Cambrian Stage 2) near Yichang, China. Though similar to Olivooides and Quadrapyrgites from the Fortunian Stage in consisting of a partially corrugated (long.) periderm with a quadrate (transv.) apical portion and V-shaped apertural lobes, O. elongatus is substantially larger than other olivooids. The elongate apical region of O. elongatus is similar to four-sided Anaconularia anomala, though with a flat tip that may have been an adaption for a sessile mode of life. As in other olivooids, embryonic development in O. elongatus may have been direct. Lastly, the paucity of olivooids and the absence of pentaradial cnidarians and carinachitids in Cambrian Stage 2 indicate a marked decline in the disparity of cnidarians near the Fortunian/Cambrian Age 2 boundary, when by contrast bilaterians underwent rapid diversification.</p>
Data from: A new tetraradial olivooid (Medusozoa) from the Lower Cambrian (Stage 2) Yanjiahe Formation, South China
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Fig. 1 in Species composition and distribution of medusae (Cnidaria: Medusozoa) along the Algerian coast between 2°E and 7°E (SW Mediterranean Sea) Abstract
Fig. 1: Sampling area along the Algerian coast.
FIGURE 8. A–H in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 8. A–H Clytia linearis (Thornely, 1900): A–E, medusa; B, manubrium; C, female and male gonads; D, statocyst; E, nematocysts microbasic b-mastigophore type A; F–H, polyp; G–H, hydrothecae and gonothecae. I–J Clytia simplex (Browne, 1902): I, medusa with gonads; J, manubrium. Scale equals A, G, I—500 µm; B, C, J—200 µm; D—100 µm, E—20 µm; F—1 mm; H—340 µm.
FIGURE 5. A–E in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 5. A–E Antennella secundaria (Gmelin, 1791): A, basal part of hydrocladium; B, internode; C, hydrotheca and nematotheca; D, gonothecae; E, nematocysts microbasic mastigophore. F–K Halopteris violae Calder, Mallinson, Collins & Hickman, 2003: F, monosiphonic colony; G, hydrocaulus and hydrocladia; H, hydrotheca of hydrocaulus; I, nematothecae; J, gonothecae; K, nematocysts microbasic mastigophores. Scale equals A, D, H, J—200 µm; B, C, I—50 µm; E—13 µm; F—3 mm; G—500 µm; K—17 µm.
FIGURE 4. A Bimeria vestita Wright, 1859 in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 4. A Bimeria vestita Wright, 1859: pseudohydrotheca. B–E Eudendrium capillare Alder, 1856: B, colony; C, hydranths; D, male gonophore; E, nematocyst heterotrichous microbasic eurytele. F–M Aglaophenia sp. Fraser, 1938b: F, hydrocaulus; G–H, hydrocladia; I–J, hydrotheca with nematothecae; K, corbula; L, nematocyst microbasic mastigophore; M, colony. Scale equals A—100 µm; B, K—500 µm; C—250 µm; D, H—220 µm; E—11 µm; F—300 µm; G—200 µm; I—50 µm; J—70 µm; L—20 µm; M—5 mm.
FIGURE 1 in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 1. Sampling sites in Pichilingue Beach. A) La Paz Bay; B) Port of Pichilingue. Sampling sites marked with black triangles.
FIGURE 3. A–B Rhopalonema velatum Gegenbaur, 1857 in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 3. A–B Rhopalonema velatum Gegenbaur, 1857: A, ecto-endodermal statocyst; B, nematocyst of medusa; a, stenotele; b, desmoneme. C–G Hydrocorynidae: C, colony; D, encrusting colony and amorphous hydrorhizal; E, hydranths and gonophore; F, capitate tentacles; G, nematocyst of polyp; a, stenotele; b, microbasic euryteles. H–K Stauridiosarsia ophiogaster (Haeckel, 1879): H, medusa; I, manubrium and gonads; J, capitate tentacles; K, nematocyst of medusa; a, desmoneme; b, stenotele. L, Bimeria vestita Wright, 1859 polyp. Scale equals A, F, J—200 µm; B, K, G—20 µm; C—33 mm; D—3.5 mm; E—0.8 mm; H—0.7 mm; I—500 µm; L—0.2 mm.
FIGURE 11. A–F in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 11. A–F Obelia spp.: A, medusa; B, manubrium; C, gonads spherical; D, tentacles; E, statocyst; F, nematocyst; a, isorhiza; b, microbasic b-mastigophore. Scale equals A, C—500 µm; B, D, E—50 µm; F—20 µm.
FIGURE 6. A–E in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 6. A–E Ventromma halecioides (Alder, 1859): A, erect colony; B, hydrocaulus; C, hydrocladia; D, gonothecae; E, nematocysts microbasic mastigophore. F–J Plumularia floridana Nutting, 1900: F, erect colony; G, hydrocaulus; H, hydrotheca and nematothecae; I, nematothecae between hydrocaulus and hydrocladia; J, male gonophore. Scale equals A—2 mm; B, G— 500 µm; C—100 µm; D—200 µm; E—13 µm; F—1 mm; H–J—50 µm.
FIGURE 2. A–D in Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California
FIGURE 2. A–D Solmundella bitentaculata (Quoy & Gaimard, 1833): A, lobed umbrela margin; B, peronia; C, ectodermal statocyst; D, nematocyst of medusa; a, macroisorhizas; b, microisorhizas. E–J Liriope tetraphylla (Chamisso & Eysenhardt, 1821): E, medusa; F, gonad; G, centripetal canal; H, marginal tentacles; I, ecto-endodermal statocyst; J, nematocyst of medusa; a, macrobasic eurytele; b, microbasic eurytele. K–L Rhopalonema velatum Gegenbaur, 1857: K, umbrela medusa; L, velum and tentacles. Scale equals A, B, F–I, K, L—200 µm; C—50 µm; D—12 µm; E—500 µm; J—20 µm.
doi_________::31048754c33f244da86ae270421999b1
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doi_________::65b7b55e0221c0df5a4c293c66691377
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