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48 results for “Leptothecata”
Figure 7 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 7 Paraloveniayongalensis sp. n., Holotype QM G335907. A Magnified view of cirri cluster; note statocyst-like structure (red circle) and two sizes of nematocysts on coiled cirrus (arrows) B Detail of nematocysts in bulb (upper left arrow) and cirrus (lower right arrow). Scale bars: 100 µm (A); 50 µm (B).
Figure 1 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 1 A Distribution of type localities of species of Melicertissa and ParaloveniaB Locations in Moreton Bay, Queensland, Australia, where M.antrichardsoni sp. n. was collected.
Figure 6 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 6 Paraloveniayongalensis sp. n., Holotype QM G335907. A Gonad with egg follicles (upper left; 2nd right gonad in habitus photo in Figure 5A), a subumbrellar nematocyst cluster can be seen near the centre, and is detailed in the box to the right B Another gonad with egg follicles (far right gonad in habitus photo in Figure 5A), and a subumbrellar nematocyst cluster to the lower left. Scale bars: 90 µm (A); 40 µm (B).
Figure 5 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 5 Paraloveniayongalensis sp. n., Holotype QM G335907. A habitus; note conical statocyst-like structure (indicated by red arrow) B Aboral view of stomach (cruciform structure closest to the viewer) and mouth (quadratic structure away from the viewer) C Oral view of margin (note that the gonads are the darkest brown structures, and the mouth is the quadratic structure near the upper left). Black arrows in A and C: tentacular bulbs indicated by solid arrows and bulbs bearing cirri indicated by dashed arrows. Scale bars: 0.5 mm (A); 250 µm (B, C).
Figure 8 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 8 Paraloveniayongalensis sp. n., Holotype QM G335907. A Detail of nematocysts of the tentacle (arrow) B Detail of nematocysts of the tentacular bulb (white arrow) and of a subumbrellar nematocyst cluster (black arrow). Scale bars: 50 µm (A, B).
Figure 4 from: Uribe-Palomino J, Pausina S, Gershwin L-A (2018) (2018) Two new species of Hydromedusae from Queensland, Australia (Hydrozoa, Leptothecata). ZooKeys 783: 17-36. https://doi.org/10.3897/zookeys.783.26862
Figure 4 Melicertissaantrichardsoni sp. n. A Non-type specimen lost during study, inverted, note dark pigmenting of tentacle bulbs and ocelli (arrow) B Holotype QM G335899, cordylus, note cap-like position of nematocysts C Holotype QM G335899, cordylus, detail of nematocysts D Paratype QM G335902, note conspicuous radial canals (e.g., arrow) E tentacular nematocysts F nematocyst from whole body squash (QM G335905 and QM G335906 collectively). Scale bars: 1 mm (A, D); 50 µm (B, C); 20 µm (E, F).
Figure 1 in Revision of the genus Cryptolarella Stechow, 1913 (Lafoeidae, Leptothecata, Hydrozoa)
Figure 1. Cryptolarella abyssicola (Allman, 1888). (A) Fertile colony (Eltanin St. 27/1948); (B) gonotheca on stem (Eltanin St. 10/848); (C) hydrotheca with polyp inside; (D) hydrothecal aperture; (E) arising hydrotheca; (F) distal part of gonotheca (C–F from BMNH 1888.11.13.26). Scale bars: 2.0 mm (A); 1.0 mm (B, D); 0.3 mm (C, E, F).
Fig. 2 in A swimming medusoid gonophore in the life cycle of Ventromma halecioides (Alder, 1859) (Hydrozoa: Leptothecata: Kirchenpaueriidae)
Fig. 2. (A-B) Male medusoid either showing colors in life (A), or stained (B) and displaying an Y-shaped spadix. (C) Partially spawned female medusoid with aggregate of oocytes. (D-F) Three steps of spawning (note presence of velum). (G) Emptied female medusoid. (H) Stained male medusoid partly liberating its gametes, showing directional arrangement of sperm cells. (I) Spawned male medusoid partly liberated from its membrane. (J, K) Spawned medusoids of unknown sex(es), the latter with the bell inside-out. (L-M) Belt of refringent corpuscles seen apically in a male medusoid (L) and laterally in a female (M). (N) Close-up of the refringent corpuscles. (O) Bell margin of a female medusoid showing large, vacuolated cells after the dissolution of the concretions (blue arrowheads). (P-Q) Pseudostenoteles from exumbrella either undischarged (P) or discharged (Q). Scale bars: 10 μm (P, Q), 20 μm (N), 100 μm (L, M, O), 200 μm (B, D-F, H), 400 μm (A, C, G, I-K).
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