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18 results for “Halecium”
Figures 17A–E. Halecium spec., stn 90. A, colony. B, polysiphonic stem with monosiphonic branches. C, monosiphonic branch with hydrophores. D, young gonotheca erupting from stem. E in Deep-water hydroids (Hydrozoa: Leptolida) from Macquarie Island
Figures 17A–E. Halecium spec., stn 90. A, colony. B, polysiphonic stem with monosiphonic branches. C, monosiphonic branch with hydrophores. D, young gonotheca erupting from stem. E, more advanced gonotheca, distal end damaged. Scale bar: A, 50 mm; B, 1 mm; C, 0.2 mm; D, E, 0.1 mm.
Figures 16A–C. Halecium delicatulum, stn 122. A in Deep-water hydroids (Hydrozoa: Leptolida) from Macquarie Island
Figures 16A–C. Halecium delicatulum, stn 122. A, distal part of colony. B, monosiphonic branch. C, hydrophores, enlarged. Scale bar: A, 5 mm; B, 0.5 mm; C, 0.3 mm.
Figures 14A–D. Halecium ralphae, stn 119. A, colony. B in Deep-water hydroids (Hydrozoa: Leptolida) from Macquarie Island
Figures 14A–D. Halecium ralphae, stn 119. A, colony. B, distal part of branch. C, apophysis of stem and proximal part of branch. D, hydrophore and hydrotheca. Scale bar: A, 5 mm; B, C, 0.5 mm; D, 0.1 mm.
FIGURES 1–12 in Halecium arcticum (Cnidaria: Hydrozoa), a new species of hydroid from Spitsbergen
FIGURES 1–12. Halecium arcticum sp. nov, all after preserved material from Spitsbergen. (1) Colony silhouettes, the left one is polysiphonic, the right one monosiphonic, scale bar 5 mm. (2) Typical branching pattern, scale bar 0.2 mm. (3) Terminal region of a branch with two hydrothecae, note presence of a pseudodiaphragm below diaphragm and the short, quadrangular segments, scale bar 0.1 mm. (4) Primary and secondary hydrothecae, scale bar 0.1 mm. (5) Female gonotheca in frontal view, scale bar 0.5 mm. (6) Same as (5), in side view. (7–9) Female gonothecae, note variation, same scale as (5). (10) Distal end of female gonotheca with characteristic horns flanking the opening, scale bar 0.2 mm. (11) Rare, mature, female gonotheca lacking distal horns; same scale as 10. (12) Mature male gonotheca seen from broad side, with sperm mass, scale bar 0.2 mm. (13) Immature male gonotheca, same scale as (12).
FIGURE 12 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 12. Halecium pseudoincertus sp. nov. (A–F) internodes showing primary and lower-order hydrothecae (note strong development of pseudodiaphragm). (A–D from holotype; E–F from paratype). Scale bar: 250 µm.
FIGURE 11 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 11. Halecium pseudodelicatulum sp. nov. (A–B, D) internodes showing hydrothecae (B with secondary hydrotheca); (C) detail of primary and secondary hydrothecae; (E) female gonotheca showing eggs (frontal view); (F) female gonotheca (lateral view); (G) male gonotheca. (A–C, E–F from type material; D, G from Stn Low 45). Scale bar: 250 µm.
FIGURE 10 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 10. Halecium pseudodelicatulum sp. nov. (A) colony. Halecium pseudoincertus sp. nov. (B) colony. (A from type material; B from holotype). Scale bar: 2 cm.
FIGURE 9. Halecium jaederholmi Vervoort, 1972 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 9. Halecium jaederholmi Vervoort, 1972. (A–E) internodes showing primary hydrothecae (D with a second-order hydrotheca; D and E showing origin of gonothecae); (F–G) female gonothecae showing eggs and hydrothecae. (All drawings from holotype). Scale bar: 250 µm (A–E), 500 µm (F–G).
FIGURE 8. Halecium interpolatum Ritchie, 1907 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 8. Halecium interpolatum Ritchie, 1907. (A) fragment of stem showing branching; (B) hydrothecae and polyp. (From type material). Scale bar: 100 µm (B), 200 µm (A).
FIGURE 5. Halecium elegantulum Watson, 2008 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 5. Halecium elegantulum Watson, 2008. (A–B) complete stems; (C) fragment of stem showing hydrothecal arrangement; (E–F) detail of hydrothecae. Halecium interpolatum Ritchie, 1907. (G) fragment of stem showing branching and internode structure; (H, J) part of stems showing hydrotheca and internode structure; (I) incipient stem. Halecium tenellum (sensu Hartlaub, 1904). (K) fragment of stem showing internode structure and primary and second-order hydrothecae. Halecium tubatum Watson, 2008. (L) incipient stem. (A–G, L from type material; H–J from material originally described as H. tubatum). Scale bar: 125 µm (D–F), 250 µm (C, G–L), 500 µm (A–B).
FIGURE 6 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 6. Halecium incertus Naumov & Stepanjants, 1962. (A–D, F–H) internodes showing hydrothecae (A with secondary hydrotheca); (E) female gonotheca (lateral view); (I) female gonotheca (frontal view). (A–E from holotype of H. incertus; F–I from holotype of H. macrocaulus Watson, 2008). Scale bar: 250 µm (A–D, F–H), 500 µm (E, I).
FIGURE 2 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 2. Halecium antarcticum Vanhöffen, 1910. (A) female gonotheca (lateral view); (B) acrocyst with eggs. Halecium pseudodelicatulum sp. nov. (C–D) female gonothecae showing eggs. (A–B from Stn BTC 25; C–D from type material). Scale bar: 200 µm.
FIGURE 1 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 1. Halecium antarcticum Vanhöffen, 1910. (A–D) internodes showing primary and lower-order hydrothecae; (E) male gonotheca; (F) female gonotheca (frontal view); (G) female gonotheca (lateral view) with acrocyst showing eggs. (A–B, E from holotype; C–D, F–G from Stn BTC 25). Scale bar: 250 µm.
FIGURE 7 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 7. Halecium incertus Naumov & Stepanjants, 1962. (A–C) internodes showing hydrothecae (C with secondary hydrotheca); (D) female gonotheca with acrocyst; (E–G) a female gonotheca in different views. (All drawings from Stn PS65/ 019). Scale bar: 250 µm (A–C), 500 µm (D–G).
FIGURE 3. Halecium banzare Watson, 2008 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 3. Halecium banzare Watson, 2008. (A–C) internodes showing primary and lower-order hydrothecae; (D) male gonotheca. Halecium pallens Jäderholm, 1904. (E) cauline internode showing basal part of paired branches and axillary hydrotheca; (F–I), internodes showing primary and lower-order hydrothecae; (J) female gonotheca (frontal view); (K) female gonotheca (lateral view). (A–C, E–K from holotypes; D from Stn Low 46). Scale bar: 250 µm (A–C, E–I), 500 µm (D, J–K).
FIGURE 4. Halecium brevithecum Watson, 2008 in Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae)
FIGURE 4. Halecium brevithecum Watson, 2008. (A–C) internodes showing primary hydrothecae (A with basal ahydrothecate intermediate internode). Halecium secundum Jäderholm, 1904. (D–F) internodes showing primary hydrothecae. (All drawings from type material). Scale bar: 250 µm.
FIGURE 15. Halecium banzare Watson, 2008 in Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa
FIGURE 15. Halecium banzare Watson, 2008: A, internodes with primary and second-order hydrothecae; B, gonotheca. Halecium exaggeratum Peña Cantero, Boero & Piraino, 2013: C, internode with primary and secondary hydrotheca as well as lower-order branch; D, internodes with primary hydrothecae; E, gonotheca. Halecium interpolatum Ritchie, 1907: F, internode with primary hydrotheca and internode structure. Halecium jaederholmi Vervoort, 1972: G, internodes with primary hydrothecae. Halecium secundum Jäderholm, 1904: H, internode with primary hydrotheca. (A from Stn 53; B from Stn 139; C–E, H from Stn 67; F from Stn 107; G from Stn 112). Scale bar: 250 µm.
Figure 1 in Redescription of the leptothecate hydroid Halecium macrocephalum Allman, 1877 (Cnidaria: Hydrozoa)
Figure 1. Distinguishing morphological characteristics of the leptothecate hydroid Halecium macrocephalum Allman, 1877. The colony is densely branched with a thick, strongly polysiphonic hydrocaulus (A; scale bar 10 mm). Notably, many hydrothecae are steeply sloped at an approximately 45◦ angle (B; scale bar 500 µm). The kidney-shaped nature of the female gonotheca (C; scale bar 1 mm). The characteristic sigmoidal and elongated shape of the male gonothecae form the basis for this redescription (D; scale bar 1 mm), a shape that differs significantly from that figured for the holotype by Allman (1877).
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