Influence of the geometry on a field-road model : the case of a conical field

Field-road models are reaction-diffusion systems which have been recently introduced to account for the effect of a road on propagation phenomena arising in epidemiology and ecology. Such systems consist in coupling a classical Fisher-KPP equation to a line with fast diffusion accounting for a road. A series of works investigate the spreading properties of such systems when the road is a straight line and the field a half-plane. Here, we take interest in the case where the field is a cone. Our main result is that the spreading speed is not influenced by the angle of the cone

Southern Ocean areas of endemism: a reanalysis using benthic hydroids \ud (Cnidaria, Hydrozoa)

The biogeographic history of the Southern Ocean (SO) fauna is complex and poorly studied, \ud especially the areas of endemism. We reanalyzed the data of Marques & Peña Cantero (2010), along with \ud other geographical records of endemic benthic hydroids below 45ºS. A Parsimony Analysis of Endemicity \ud (PAE) based on 5º latitude by 5º longitude matrix with 61 species resulted in eight areas of endemism. We \ud discuss these results in the context of different hypotheses of the evolution of the SO fauna and previously \ud proposed biogeography patterns.La historia biogeográfica de la fauna del océano Antártico (OA) es compleja y está poco \ud estudiada, principalmente en relación a las áreas de endemismo. Se ha reanalizado los datos de Marques & \ud Peña Cantero (2010) junto con otros registros geográficos de hidrozoos bentónicos endémicos de la zona abajo \ud de los 45ºS. Una Análisis de Parsimonia de Endemismos (PAE) a partir de una matriz de 5º latitud por 5º \ud longitud con 61 especies, obtuvo ocho áreas de endemismo. Se discute los resultados tomando en cuenta \ud diferentes hipótesis sobre la evolución de la fauna del OA y los patrones biogeográficos de la literatura.This study was supported by CAPES (Proc. 9194/11- 8; PROCAD and PROTAX), CNPq (Proc. 557333/ 2005-9; 490348/2006-8; 304720/2009-7, 562143/ 2010-6, 563106/2010-7, 564945/2010-2; 477156/ 2011-8), and FAPESP (Proc. 2004/09961-4; 2010/ 06927-0; 2010/52324-6; 2011/50242-5). This study is a contribution of NP-BioMar, USP. This study was also developed thanks to a research project (Ref. CTM2009-11128ANT) funded by the Ministerio de Ciencia e Innovación of Spain and the Fondo Europeo de Desarrollo Regional (FEDER)

Halecium interpolatum Ritchie 1907

<i>Halecium interpolatum</i> Ritchie, 1907 <p>(Fig. 15 F)</p> <p> <i>Halecium ovatum</i> Totton, 1930: 143 –144, fig. 3; Peña Cantero <i>et al.</i>, 2013: 745–747, fig. 6b. <i>Halecium interpolatum</i> — Peña Cantero, 2014b: 261 –263, figs 5G–J, 8A–B (synonymy).</p> <p> <b>Material examined.</b> Stn 7, a few slightly polysiphonic stems up to 8 mm high on <i>Antarctoscyphus grandis</i> (NIWA 117594); Stn 67, two stems up to 3 mm high on <i>Staurotheca nonscripta</i> (MNCN 2.03/648); Stn 107, slightly polysiphonic stem ca. 19 mm high (NIWA 117595).</p> <p> <b>Measurements (in µm).</b> <i>Hydrothecae</i>: diameter at aperture 150–245, diameter at diaphragm 100–145, height 45–65. <i>Cnidome</i>: microbasic euryteles (10.5–12.0 x 6.0–6.5) and microbasic mastigophores (6.5–7.0 x 2.0).</p> <p> <b>Remarks.</b> Species easily identifiable by its typical scorpioid stems, with internodes arranged in zigzag and paired branches originating from hydrophore of primary hydrotheca, one on each side. Additionally, internodes characteristically have a long and straight basal part (Fig. 15 F). Hydrothecae are high, flared, with a strongly everted rim (Fig. 15 F).</p> <p> <b>Ecology and distribution.</b> Recently reviewed by Peña Cantero (2014b). Shelf species collected at depths from three (Stepanjants 1979) to 471 m (Peña Cantero & García Carrascosa 1995); present material between 272 and 536 m, epibiotic on <i>Antarctoscyphus grandis</i> and <i>Staurotheca nonscripta</i>.</p> <p> Circum-Antarctic distribution (Peña Cantero 2014b). In the Ross Sea, already known from off Cape Adare (Totton 1930) and Tethys Bay (Peña Cantero <i>et al.</i> 2013). Present material collected off Cape Adare, Possession Islands and Cape Hallet.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 50, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Symplectoscyphus weddelli Pena Cantero, Svoboda & Vervoort 2002

<i>Symplectoscyphus weddelli</i> Peña Cantero, Svoboda & Vervoort, 2002 <p>(Figs 12 I, 13B)</p> <p> <i>Symplectoscyphus weddelli</i> Peña Cantero <i>et al.</i> 2002: 1560 –1562, fig. 16; Peña Cantero, 2010a: 41 –42.</p> <p> <b>Material examined.</b> Stn 53, fragment 10 mm long (MNCN 2.03/643); Stn 134, several incipient stems up to 13 mm high on tubes of benthic organism (NIWA 117588).</p> <p> <b>Description.</b> Monosiphonic stems, up to 13 mm high. Typically unbranched (only three stems with primary branch). Stems divided into somewhat straight internodes. Hydrothecae alternately arranged in approximately one plane.</p> <p>Hydrotheca (Figs 12 I, 13B) roughly cylindrical, gradually curved abcaudally. Adcauline wall convex; without inflexion point where adcauline wall becomes free. Abcauline wall roughly straight basally and slightly concave at distal half. Cusp of hydrothecal aperture sharp and separated by deep embayments.</p> <p> <b>Measurements (in µm).</b> <i>Hydrothecae</i>: length abcauline wall 350–400, length free part of adcauline wall 280–290, length adnate part of adcauline wall 280–350, length adcauline wall 560–570, diameter at aperture 160–180, maximum diameter 190, diameter at diaphragm 120. <i>Cnidome</i>: larger microbasic mastigophores, range 9.0–10.0 x 2.5–3.0, mean 9.5±0.4 x 2.7±0.2 (n=6); ratio, range 3.3–3.8, mean 3.6± 0.2 (n=6).</p> <p> <b>Remarks.</b> Even when the infertile condition of the present material prevents a definitive identification, there are no significant differences with the original description of <i>S. weddelli</i>.</p> <p> <b>Ecology and distribution.</b> Shelf species, collected at depths from 119 to 390 m (Peña Cantero <i>et al.</i> 2002); present material between 60 and 197 m, epibiotic on tube of benthic organism.</p> <p> Species reported only along the south and east coasts of the Weddell Sea (Peña Cantero <i>et al.</i> 2002); studied material is the first record from the Ross Sea and East Antarctica, collected in Robertson Bay and off Cape Hallett, pointing to a circum-Antarctic distribution.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 46, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Schizotricha falcata Pena Cantero 1998

<i>Schizotricha falcata</i> Peña Cantero, 1998 <p> <i>Schizotricha falcata</i> Peña Cantero, 1998: 78 –79, fig. 1; 2008: 456; 2013: 129; Peña Cantero & Vervoort, 1999: 361 –362 (synonymy); 2005: 803.</p> <p> <b>Material examined.</b> Stn 13, stem 170 mm high on pebbles (MNCN 2.03/664); Stn 15, stem 410 mm high, with female gonothecae (NIWA 117325).</p> <p> <b>Ecology and distribution.</b> Shelf species (Peña Cantero & Vervoort 2005), found at depths between 73 (Peña Cantero & Vervoort 2005) and 248 m (Peña Cantero 2008); present material between 466 and 535 m, notably extending its lower bathymetric limit. Hydrorhizal stolons attached to gravel and pebbles (Peña Cantero 2008; present material). Used as substratum by other hydroids (Peña Cantero 2008, 2013). Gonothecae in January (Peña Cantero 1998, 2008) and February (Peña Cantero 2013; present material).</p> <p>Considered endemic to West Antarctica (Peña Cantero & Vervoort 1999), being known off Low Island (Blanco 1984; Peña Cantero 2013), King George Island (Peña Cantero 1998), and Deception Island (Peña Cantero 2008), in the South Shetland Islands area, off Astrolabe Island, Antarctic Peninsula, and off Anvers Island, Palmer Archipelago (Peña Cantero & Vervoort 2005). Present material is the first record from the Ross Sea and from East Antarctica, collected off Possession Islands, suggesting a circum-Antarctic distribution.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 56, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Antarctoscyphus elongatus Jaderholm 1904

<i>Antarctoscyphus elongatus</i> (Jäderholm, 1904) <p> <i>Sertularella elongata</i> — Totton, 1930: 199.</p> <p> <i>Antarctoscyphus elongatus</i> —Peña Cantero <i>et al.</i>, 1999: 1745–1748, fig. 2A–F (synonymy); Peña Cantero & Gili, 2006: 767; Peña Cantero, 2006: 938–939, fig. 3j; 2008: 458; 2012: 858; 2014a: 1721, fig. 4h; Galea & Schories, 2012: 9, fig. 2L, M.</p> <p> <b>Material examined.</b> Stn 14, stem fragment 15 mm long (NIWA 117547); Stn 53, two stems up to 45 mm high (NIWA 117548); Stn 198, stem 14 mm high on gravel (MNCN 2.03/619).</p> <p> <b>Ecology and distribution.</b> Revised by Peña Cantero <i>et al.</i> (1999) and Peña Cantero (2006). Eurybathic species collected at depths from 10 (Naumov & Stepanjants, 1972) to 1958 m (Peña Cantero 2012); present material from 197 to 451 m, epilithic on gravel.</p> <p> Antarctic-Kerguelen distribution (Peña Cantero 2012). Recently recorded from off Bouvet Island (Peña Cantero & Gili 2006), Livingston Island (Peña Cantero 2006, 2008), Deception Island (Peña Cantero 2008), King George Island (Galea & Schories 2012) and the Bellingshausen Sea (Peña Cantero 2012), in West Antarctica, and from off Queen Mary Coast (Peña Cantero 2014a), in East Antarctica. See Peña Cantero <i>et al.</i> (1999) for previous records. In the Ross Sea, already known from McMurdo Sound (Totton 1930). Present material off Adare Peninsula, Possession Islands and Cape Hallet.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 38, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Halecium tangaroa CANTERO, 2017, sp. nov.

<i>Halecium tangaroa</i> sp. nov. <p>(Figs 17–18)</p> <p> <b>Material examined.</b> Stn 124, a few stems up to 3 mm high on <i>Staurotheca pachyclada</i> (MNCN 2.03/653); Stn 130, a few tiny stems up to 7 mm high on <i>S. densa</i>, with gonothecae (NIWA 117601); Stn 139, a few stems up to 3 mm high on <i>S. nonscripta</i>, with female gonothecae (MNCN 2.03/654); Stn 140, a few stems up to 3 mm high on <i>S. nonscripta</i>, with male? gonothecae (NIWA 117602); Stn 178, two colonies with several stems up to 4 mm high on <i>Staurotheca compressa</i>, with female gonothecae (holotype, NIWA 115619; paratype, NIWA 115620).</p> <p> <b>Description.</b> Monosiphonic stems, up to 7 mm high. Stems usually with series of annulations basally (Figs 17 A–B, 18A–B), either starting with internode provided with distal hydrotheca (Fig. 17 A), usually with several of lower order (Fig. 17 B), or with regular internode provided with long hydrophore (Fig. 18 B); in the former situation, regular internodes originating from hydrophore of lower-order hydrothecae (Fig. 17 C). Stems unbranched or scarcely branched, irregularly giving rise to primary branches, either originating from hydrophore of primary hydrotheca or, more frequently, from hydrophore of lower-order hydrothecae (Figs 17 C, 18C). Secondary branches usually originating from hydrophore of lower-order hydrothecae. Stem and branches divided into internodes by alternately arranged oblique nodes, usually with series of annulations at basal part. Internodes arranged in zigzag (Fig. 17 C). Hydrothecae alternately arranged in one plane and placed at end of free hydrophores (Figs 17 C–F, 18A–B, D); ratio adcauline length of hydrophore:diameter at diaphragm 0.6–1.6. Abcauline side of hydrophore straight or slightly convex; adcauline side straight or slightly concave (Figs 17 C–F, 18D). Hydrothecae exceeding distal node of internode; typically without pseudodiaphragm. Hydrotheca relatively high, widening distally, particularly at distal part; rim everted (Figs 17 A–F, 18A–E). Up to seventh-order hydrothecae (Fig. 18 C).</p> <p>Gonothecae (Figs 17 G–H, 18F) flattened, bivalve-shaped on hydrorhiza and/or stem. Female gonothecae with about eight eggs (Fig. 18 G–H).</p> <p> <b>Measurements (in µm).</b> <i>Hydrothecae</i>: diameter at aperture 180–235, diameter at diaphragm 100–140, height 65–100, adcauline length of hydrophore 70–200. <i>Gonothecae</i>: female, height 600–950, width 500–600; male?, height 470–500, width 400. <i>Cnidome</i>: microbasic euryteles?, with blunt ends [range 10.0–12.0 x 6.0–7.0, mean 11.1±0.6 x 6.6±0.4 (n=7); ratio, range 1.6–1.8, mean 1.7±0.1(n=7)] and microbasic mastigophores?, with sharp ends [range 6.0–7.0 x 1.5–2.0].</p> <p> <b>Remarks.</b> <i>Halecium tangaroa</i> <b>sp. nov.</b> is characterized by tiny stems, up to 7 mm high, unbranched or with sparse and irregular ramification, with relatively high, flared hydrothecae on free hydrophores and with gonothecae both on stem and hydrorhiza. It is allied with several Antarctic species characterized by having hydrothecae on free hydrophores (e.g. <i>H. antarcticum</i>, <i>H. pseudodelicatulum</i>), but particularly with <i>H. interpolatum</i>, with which it shares the shape and size of the hydrotheca and the size of the microbasic euryteles. However, there are important differences between both species. Whereas <i>H. tangaroa</i> <b>sp. nov.</b> has tiny, up to 7 mm high, monosiphonic stems, <i>H. interpolatum</i> has much larger, up to 35 mm high, basally polysiphonic stems. They also differ in the branching pattern, as <i>H. interpolatum</i> has paired branches originating from hydrophore of primary hydrotheca, whereas stems are irregularly branched in <i>H. tangaroa</i> <b>sp. nov.</b>, and the single branches usually originate from hydrophores of lower-order hydrothecae. In addition, they are clearly distinguishable because internodes in <i>H. interpolatum</i> have a very characteristic, long and straight basal part (cf. Peña Cantero 2014b). Finally, they also differ in the fact that gonothecae develop from within hydrothecae in <i>H. interpolatum</i>, whereas they originate from the stem and hydrorhiza in <i>H. tangaroa</i> <b>sp. nov.</b></p> <p> <b>Ecology and distribution.</b> <i>Halecium tangaroa</i> <b>sp. nov.</b> was collected at depths from 120 to 348 m, off Cape Adare, Adare Peninsula and Moubray Bay. It was found epibiotic on several species of <i>Staurotheca</i> (i.e. <i>S. compressa</i>, <i>S. densa</i>, <i>S. nonscripta</i> and <i>S. pachyclada</i>). Gonothecae were present in colonies collected in February.</p> <p> <b>Etymology.</b> The specific name “ tangaroa ” is a tribute to the New Zealand research vessel RV <i>Tangaroa</i>.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on pages 52-53, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Hebella plana Ritchie 1907

<i>Hebella plana</i> Ritchie, 1907 <p>(Fig. 9)</p> <p> <i>Hebella plana—</i> Totton, 1930: 156–157, fig. 12a, b; Peña Cantero <i>et al.</i>, 2004: 2290–2291 (synonymy); Peña Cantero, 2008: 454; 2010b: 766; 2014a: 1718, fig. 2g, h.</p> <p> <i>Hebella striata</i> var. <i>plana</i> — Jäderholm 1926: 4.</p> <p> <b>Material examined.</b> Stn 53, several hydrothecae on <i>Staurotheca densa</i>, <i>S. nonscripta,</i> and <i>Staurotheca</i> sp. (MNCN 2.03/539); Stn 67, a few hydrothecae on <i>S. nonscripta</i> and <i>Halecium exaggeratum</i> Peña Cantero, Boero & Piraino, 2013 (NIWA 117499); Stn 108, two hydrothecae on <i>Antarctoscyphus spiralis</i> (Hickson & Gravely, 1907) (NIWA 117500); Stn 126, six hydrothecae on <i>Staurotheca densa</i> (MNCN 2.03/540); Stn 139, a few hydrothecae on <i>Staurotheca nonscripta</i> (NIWA 117501); Stn 140, several hydrothecae on <i>Staurotheca nonscripta</i> and <i>S. dichotoma</i> Allman, 1888 (NIWA 117502); Stn 148, a few hydrothecae on <i>S. nonscripta</i> (MNCN 2.03/541); Stn 178, a few hydrothecae on <i>Staurotheca compressa</i> Briggs, 1938 (NIWA 117503).</p> <p> <b>Remarks.</b> In the material from Stn 178 some hydrothecae seem to emerge from within hydrothecae of <i>Staurotheca compressa</i>. In the material from Stn 67, on <i>Halecium exaggeratum</i>, there are shorter hydrothecae (Fig. 9 A) with small pedicels (680 µm high and 220 µm diameter at aperture, and 90 µm diameter at diaphragm), along with typical hydrothecae (1000–1200 µm high and 280–300 µm diameter at aperture, and ca. 100 µm diameter at diaphragm) (Fig. 9 B–C).</p> <p> <b>Ecology and distribution.</b> Shelf species (Peña Cantero <i>et al.</i> 2004) found at depths between 92 (Peña Cantero 2008) and 722 m (Peña Cantero <i>et al.</i> 2004); present material from 159 to 405 m, epibiotic on <i>Antarctoscyphus spiralis</i>, <i>Halecium exaggeratum</i>, <i>Staurotheca compressa, S. densa, S. dichotoma</i> and <i>S. nonscripta</i>.</p> <p> Antarctic-Patagonian distribution (Peña Cantero <i>et al.</i> 2004). Recently reported from off Livingston and Trinity islands (Peña Cantero 2008) and Peter I Island (Peña Cantero 2010b), in West Antarctica, and off Queen Mary Coast (Peña Cantero 2014a), in East Antarctica. See Peña Cantero <i>et al.</i> (2004) for previous records. In the Ross Sea, already known from Discovery Inlet (Jäderholm 1926) and McMurdo Sound (Totton 1930). Present material collected off Cape Adare, Adare Peninsula, Moubray Bay and Cape Hallet.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 24, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Symplectoscyphus frondosus Pena Cantero 2010

<i>Symplectoscyphus frondosus</i> Peña Cantero, 2010 <p> <i>Symplectoscyphus frondosus</i> Peña Cantero, 2010a: 30 –34, figs 1A–C, 2.</p> <p> <b>Material examined.</b> Stn 82, two stems, 165 (NIWA 60488) and 65 mm high (MNCN 2.03/437), with gonothecae; Stn 102, fragment 6 mm long, with incomplete female? gonothecae (NIWA 60489); Stn 103, three stems, 85, 40 (NIWA 60490) and 30 mm high (MNCN 2.03/438); Stn 108, branched stem 280 mm high, with gonothecae (NIWA 60491); Stn 171, two stems, 100 (NIWA 60492) and 95 mm (MNCN 2.03/439), on mollusc shell.</p> <p> <b>Remarks.</b> Species described by Peña Cantero (2010a) from this material.</p> <p> <b>Ecology and distribution.</b> Species collected at depths between 400 and 564 m, off Cape Adare, Adare Peninsula and Cape Hallett and with gonothecae in February.</p> <p>Hitherto considered endemic of the area of study.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 44, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt

Symplectoscyphus plectilis Hickson & Gravely 1907

<i>Symplectoscyphus plectilis</i> (Hickson & Gravely, 1907) <p> <i>Sertularella plectilis</i> Hickson & Gravely, 1907: 20, pl. 3, fig. 21; Ritchie, 1913: 10, 30, figs 8, 9, 11; Jäderholm, 1926: 5. <i>Symplectoscyphus plectilis—</i> Totton, 1930: 193 –194, fig. 41, pl. 2 figs 4, 5; Peña Cantero, 2010a: 40 (synonymy); 2012: 862; 2013: 134; 2014a: 1725, fig. 6g; Peña Cantero <i>et al.</i>, 2013: 747–749, fig. 9e, f.</p> <p> <b>Material examined.</b> Stn 132, a few stems up to 25 mm high on tube of benthic organism (NIWA 117583).</p> <p> <b>Ecology and distribution.</b> Eurybathic species found at depths from 7 (Vervoort 1972b) to 1958 m (Peña Cantero 2012); present material at 162–172 m, epibiotic on tube of benthic organism.</p> <p> Circum-Antarctic distribution (Stepanjants 1979). Recently reported from the Bellingshausen Sea (Peña Cantero 2012) and off Low Island (Peña Cantero 2013), in West Antarctica, and off Queen Mary Coast (Peña Cantero 2014a), in East Antarctica. See Peña Cantero (2010a) for previous records. In the Ross Sea, already known from McMurdo (Hickson & Gravely 1907; Ritchie 1913; Totton 1930), off Cape Royds (Ritchie 1913), Discovery Inlet (Jäderholm 1926) and Tethys Bay (Peña Cantero <i>et al.</i> 2013). Present material from Robertson Bay.</p>Published as part of <i>ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1)</i> on page 45, DOI: 10.11646/zootaxa.4293.1.1, <a href="http://zenodo.org/record/828475">http://zenodo.org/record/828475</a&gt