1,721,082 research outputs found
Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textCantero, A. L. Peña, Vervoort, W. (2003): Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species. Journal of Natural History 37 (22): 2653-2722, DOI: 10.1080/00222930210155701, URL: http://dx.doi.org/10.1080/0022293021015570
Trends in hydroidomedusan research from 1911 to 1997
Full text linkThe papers on hydroidomedusae published from 1911 to 1997 total 10,934. They have been assigned to the following categories: faunistics and systematics; sub-organismal biology; ecology; evolution; life cycles; paleontology. The general trend, comprising all papers, can be divided into four time intervals: the first (1911-1939) with an average of sixty papers/year and with a slight decrease due to First World War; the second one (1940-1947), with an average of 38 papers/year, marked by a dramatic decrease coinciding with Second World War; the period 1948-1991 shows a steady increase until the mid-Seventies, when a small decrease occurred, followed by an increasing trend reaching its apex in the late Eighties-early Ninenties with a record of 296 papers in 1991 and with an average of 175 papers/year; the period 1992 1997, with an average of 178 papers/year, is marked by a sharp decrease, reaching the values of the mid Sixties. The most important category in terms of number of papers is sub-organismal biology, followed by faunistics and systematics. Systematic studies dictated the trend in the first decades of the century, whereas sub-organismal ones are prevalent from the Sixties onwards. Faunistic and systematic-taxonomic papers have a steady trend of production, with just a slight decrease over these last years. The formerly leading countries in systematics (UK, USA, France) are now almost inactive in this discipline, whereas countries with little or no tradition in this field (such as Spain) are taking the leadership
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 16. Staurotheca profunda sp. nov. (A) Part of branch showing alternate arrangement of hydrothecae; (B–C) several hydrothecae (note presence of operculum). (All drawings, Stn 22/1592.) Scale bar: 1 mm (A), 400 Mm (B–C).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2704, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 11. Staurotheca juncea (Vanhoffen, 1910). (A) Fragment of branch showing arrangement of hydrothecae in verticils; (B–D) hydrothecae. (All drawings from type material.) Scale bar: 1 mm (A), 400 Mm (B–D).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2692, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 20. Staurotheca sp. (A) Fragment of branch showing arrangement of hydrothecae in verticils; (B–E) hydrothecae; (F) male gonotheca. (All drawings, Stn 12/1002.) Scale bar: 1 mm (A), 900 Mm (F), 400 Mm (B–E).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2713, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 13. Staurotheca nonscripta Peña Cantero, Svoboda and Vervoort, 1997. (A–D) Hydrothecae; (E) female gonotheca; (F) male gonotheca. (A, C–E: Stn 32/2125; B, F: Stn 32/2068.) Scale bar: 900 Mm (E), 600 Mm (F), 400 Mm (A–D).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2697, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
Figure 3 in Species of Schizotricha Allman, 1883 (Cnidaria: Hydrozoa: Halopterididae) from US Antarctic expeditions with the description of two new species
No full textFigure 3. Geographical distribution of the known Antarctic and sub-Antarctic species of Schizotricha Allman 1883. (a) S. anderssoni; (b) S. crassa; (c) S. falcata; (d) S. glacialis; (e) S. heteromera sp. nov.; (f) S. jaederholmi; (g) S. multifurcata; (h) S. nana; (i) S. southgeorgiae; (j) S. trinematotheca sp. nov.; (k) S. turqueti; (l) S. unifurcata; (m) S. vervoorti.Published as part of Peña Cantero, A. L. & Vervoort, W., 2005, Species of Schizotricha Allman, 1883 (Cnidaria: Hydrozoa: Halopterididae) from US Antarctic expeditions with the description of two new species, pp. 795-818 in Journal of Natural History 39 (11) on page 816, DOI: 10.1080/00222930400001541, http://zenodo.org/record/465777
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 5. Staurotheca cornuta Peña Cantero, García Carrascosa and Vervoort, 1999. (A) Part of branch showing hydrothecal arrangement; (B–E) hydrothecae (in E with branching). (A, B, E: Stn 12/992; C, D: Stn 12/993.) Scale bar: 1 mm (A), 400 Mm (B–E).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2677, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
F in Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species
No full textF. 15. Staurotheca pachyclada (Jäderholm, 1904) (cont.). (A) Fragment of branch showing arrangement of hydrothecae in verticils; (B–E) hydrothecae. (All drawings from type material.) Scale bar: 1 mm (A), 400 Mm (B–E).Published as part of <i>Cantero, A. L. Peña & Vervoort, W., 2003, Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species, pp. 2653-2722 in Journal of Natural History 37 (22)</i> on page 2700, DOI: 10.1080/00222930210155701, <a href="http://zenodo.org/record/10100437">http://zenodo.org/record/10100437</a>
Antarctic hydroids (Cnidaria, Hydrozoa) of the families Campanulinidae, Lafoeidae and Campanulariidae from recent Antarctic expeditions with R.V. Polarstern, with the description of a new species
No full textCantero, A. L. Peña, Svoboda, A., Vervoort, W. (2004): Antarctic hydroids (Cnidaria, Hydrozoa) of the families Campanulinidae, Lafoeidae and Campanulariidae from recent Antarctic expeditions with R.V. Polarstern, with the description of a new species. Journal of Natural History 38 (18): 2269-2303, DOI: 10.1080/00222930310001647361, URL: http://dx.doi.org/10.1080/0022293031000164736
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