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7,883 results for “Tropic”
FIGURE 17 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 17. Type materials of some poorly-known nominal species of sertulariids. A. Thuiaria maldivensis Borradaile, 1905: pair of hydrothecae (NHM 23.2.15.47). B. Tridentata occulta Stechow, 1926: pair of hydrothecae (ZSM 20041646). C. Sertularia tongensis Stechow, 1919b: pair of hydrothecae (ZSM 20041550). D, E. Tridentata westinidica Stechow, 1919a: stems (D), pair of hydrothecae (E) (both from sample ZSM 20050706). Scale bars: A–C, E = 100 µm; D = 1 mm. Photomicrographs by B. Ruthensteiner.
FIGURE 16 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 16. Type materials of some poorly-known nominal species of sertulariids. A, B. Thuiaria maldivensis Borradaile, 1905: stems (A), internode and pairs of hydrothecae (B). C. Tridentata occulta Stechow, 1926: internodes and pairs of hydrothecae. D, E. Sertularia tongensis Stechow, 1919b: stems (D), internode with pair of hydrothecae (E). F, G. Tridentata westinidica Stechow, 1919a: stems (F), internode with pair of hydrothecae (G). From materials: NMH 23.2.15.46 (A, left; D), NHM 23.2.15.47 (A, right), ZSM 20041546 (C), ZSM 20041550 (D, D), ZSM 20050705 (F), ZSM 20050706 (G). Scale bars: B, C, E, G = 200 µm; A, D, F = 1 mm. Photomicrographs by B. Ruthensteiner.
FIGURE 23 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 23. Phylogenetic hypotheses of the genus Corymorpha based on the combined 16S, 18S and 28S rRNA dataset (A), and on the COI region (B). Numbers at nodes represent BPP and MLBS, respectively.
FIGURE 14 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 14. Cnidome of Nemalecium caeruleus, sp. nov. A. Pseudostenotele. B. Banana-shaped microbasic mastigophore. C. Large, ovoid microbasic heteroneme. D. Small, ovoid microbasic heteroneme. Scale bar: 10 µm.
FIGURE 12 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 12. Nemalecium caeruleus, sp. nov., in situ. A. Whole colony in coral crevice. B, C. Colony details, showing individual polyps and their colors in life. Photo in A taken by J-M. Bertot.
FIGURE 13 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 13. Nemalecium caeruleus, sp. nov. A. Distal portion of a stem with two hydranths. B–H, M–R. Various stems, to show mode of branching, and counterparts of Nemalecium sp. (I–L). S–U. Detailed view of the mode of branching and hydrothecae. From specimens MSNMCoe367 (B–G), additional unregistered colonies (A, M–U), and MSNMCoe369 (I–L). Scale bars: S–U = 200 µm; A–R = 500 µm.
FIGURE 10 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 10. Halecium turbinariae, sp. nov. A–H. Many stems, two of which (A, B) are illustrated with their polyps. I. Detail of two neighboring cauli. J. Male gonothecae with gonophores. K–O. Female gonothecae, two of which (K, L) showing oocytes; an empty gonotheca is seen in both frontal (M) and lateral (N) views; aperture seen from above (O). P. Cnidome. Scale bars: P = 10 µm; I–O = 200 µm; A–H = 500 µm.
FIGURE 25 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 25. Phylogenetic hypotheses of the genus Corydendrium (A) and the family Eudendriidae (B) based on the 16S rRNA region. Numbers at nodes represent BPP and MLBS, respectively.
FIGURE 29 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 29. Phylogenetic hypothesis of the genus Halecium based on the 16S rRNA region. Numbers at nodes represent BPP and MLBS, respectively.
FIGURE 11 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 11. Female gonotheca of Halecium turbinariae, sp. nov. A, B. Ripe gonotheca, showing branched blastostyle ending in pair of feeding polyps (A), and oocytes behind (B). C–E. Empty gonotheca seen frontally (C), laterally (D) and apically (E). Scale bar: 200 µm.
FIGURE 32 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 32. Phylogenetic hypothesis of the family Halopterididae based on the 16S rRNA region. Numbers at nodes represent BPP and MLBS, respectively. N.B.: According to Galea et al. (2021: 341), Antennella varians (Billard, 1911b) MF784528 should be correctly regarded as A. billardi Galea (in Galea et al.), 2021. Sequences MF784526 and MF784531, identified in GenBank as Halopteris sibogae (Billard, 1913) (Galea et al. 2018: fig. 9), should bear the recently-introduced taxon name, H. longibrachia Calder & Faucci, 2021.
FIGURE 27 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 27. Phylogenetic hypotheses of the families Thyroscyphidae (A) and Sertularellidae (B) based on the 16S rRNA region. Numbers at nodes represent BPP and MLBS, respectively. N.B.: According to Galea et al. (2017: 263) and Galea & Schuchert (2019: 2), Sertularella sanmatiasensis El Beshbeeshy, 2011 FN424141 should be correctly regarded as S. antarctica Hartlaub, 1901.
FIGURE 7 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 7. Type specimens of Corymorpha balssi Stechow, 1932. A. Hydroid colony on the carapace of Schizophrys dama (Herbst, 1804), ZSM 20040176. B–F. Details of five microslide preparations, showing detached polyps: ZSM 20041647 (B), ZSM 20041648 (C), ZSM 20041649 (D), ZSM 20041650 (E), ZSM 20041651 (F). Scale bar: B–F = 2 mm. Photos by B. Ruthensteiner.
FIGURE 8 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 8. Cnidome of a polyp of Corymorpha balssi Stechow, 1932 from type material, ZSM 20040176. Unidentified capsules (A, C), desmoneme (B), stenoteles of S4 (D) and S2 (E) types. Scale bar: A–E = 10 µm.
FIGURE 9 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 9. Halecium turbinariae, sp. nov. A–D. Colonies on Turbinaria sp. (formalin-fixed material, note discoloration of the polyps over time). E. Hydranth, showing endoderm filled with zooxanthellae. F. Hydrant column, more enlarged. G–I. Cnidome. J. Zooxanthella, showing large nucleus and cytoplasm filled with chloroplasts. Scale bars: G–J = 10 µm; F = 100 µm; E = 500 µm.
FIGURE 6 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 6. Cnidome of Corymorpha balssi Stechow, 1932. A–E. Polyp stage: unidentified capsules (A, C), desmoneme (B), stenoteles of S4 (D) and S2 (E) types. F–M. Medusa stage: spherical capsules from exumbrella (F), unidentified capsules (G, I), desmoneme (H), stenoteles of four types, viz. S5 (J), S4 (K), S3 (L), S1 (M). For details on the types of capsules, refer to Table 1. Scale bar: A–M = 10 µm.
FIGURE 5. Corymorpha balssi Stechow, 1932. A in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 5. Corymorpha balssi Stechow, 1932. A. Originally unpublished drawing of a fertile polyp by Stechow's graphist, W. Rössler. B. Close-up of a ready-to-detach medusa bud, seen laterally, to show the more developed capitate tentacle, the prominent opposite tentacle, and one of a pair of lateral, comparatively less-developed tentacles. C. Corymorpha bitungensis (Xu, Huang & Gou, 2013) as the putative mature medusa of C. balssi, redrawn after Lin et al. (2013: fig. 8). Scale bars: B = 500 µm; C = 1 mm.
FIGURE 3. Corymorpha balssi Stechow, 1932, preserved specimens. A. Hydranth. B. Hydrocaulus. C in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 3. Corymorpha balssi Stechow, 1932, preserved specimens. A. Hydranth. B. Hydrocaulus. C. Detail of the upper, naked part of caulus, showing nematocyst clusters on epidermis and longitudinal, endodermal ridges. D. Junction between the upper and lower parts of caulus. E. More detailed view of the junction, showing distinct groove, as well as the presence of nematocyst clusters in the upper part, and their absence from the lower part. F. Cross-section through the upper part of caulus, to show the presence of endodermal ridges. Scale bars: E = 100 µm; C, D, F = 200 µm; A, B = 500 µm.
FIGURE 2 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 2. Detail of a living colony of Corymorpha balssi Stechow, 1932, to show its general morphology and colors; note that some polyps bear medusa buds. Photo by D. Johnson.
FIGURE 4. Corymorpha balssi Stechow, 1932, preserved specimens. A. Hydranth showing blastostyles bearing medusa buds. B in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species
FIGURE 4. Corymorpha balssi Stechow, 1932, preserved specimens. A. Hydranth showing blastostyles bearing medusa buds. B. Dissected blastostyle with medusa buds at various stages of development; largest bud ready to be liberated. C. Basal view of a medusa bud at two focus depths, to show the velum (left) and the tentacles with packed nematocysts (right); the capitate tentacle is above and the large, opposite tentacle is below; note the relative smaller size of the lateral tentacles compared to the latter. Scale bars: A–C = 200 µm.
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