Sertularella asymmetra Galea & Schories, sp. nov.
Sertularella asymmetra Galea & Schories, sp. nov. (Figs 6 A, B; 7 A; Table 6) Material examined. Corral, Chaihuin/Huiro, lat. -39.95000, long. - 73.61667, 17.x.2011, 10 m, sample 28: a sterile colony (paratype: MHNG-INVE- 86232); 03.x.2011, 10 m, sample 26: a 2.5 cm high, male colony on sponge (...
Main Authors: | , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Zenodo
2014
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5281/zenodo.6143188 https://zenodo.org/record/6143188 |
id |
ftdatacite:10.5281/zenodo.6143188 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella asymmetra |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella asymmetra Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena Sertularella asymmetra Galea & Schories, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella asymmetra |
description |
Sertularella asymmetra Galea & Schories, sp. nov. (Figs 6 A, B; 7 A; Table 6) Material examined. Corral, Chaihuin/Huiro, lat. -39.95000, long. - 73.61667, 17.x.2011, 10 m, sample 28: a sterile colony (paratype: MHNG-INVE- 86232); 03.x.2011, 10 m, sample 26: a 2.5 cm high, male colony on sponge (paratype: MHNG-INVE- 86231); 27.x.2011, 10 m, sample 05: a 4.0 cm high female colony on bryozoan (holotype: MHNG-INVE- 86230). Description . Colony arising from creeping, branching, anastomosing hydrorhiza. Stems erect, up to 4 cm high, monosiphonic, spirally twisted at origin from stolon, then divided into internodes by oblique, conspicuous constrictions of the perisarc. Internodes geniculate, each bearing a latero-distal hydrotheca; length varied, though generally short, the adaxial cusp of a hydrotheca reaching or slightly surpassing the base of following hydrotheca (Fig. 6 A). Side branches arising irregularly from below the base of stem hydrothecae, either laterally or slightly displaced towards the front or the rear side of the colony. Branches with the same structure as the stem, delimited from the latter by a constriction of the perisarc. Hydrothecae fusiform, adnate for about one third their adaxial length; free adaxial wall with 2–3 weak transverse ridges; abcauline wall with margin tilted conspicuously (Fig. 6 B 1); aperture facing upwards, composed of four triangular cusps separated by shallow embayments; operculum of four flaps; there are two latero-adaxial and one abaxial internal, submarginal cusps (Fig. 6 B 2). Gonothecae ovoid, walls more or less transversely ridged; male similar to female, though more slender and longer; aperture surrounded by 3–4 perisarc projections in males (Fig. 7 A 2), and 5 in females (Fig. 7 A 1); the latter producing 12–18 rounded oocytes. Remarks . The present species is immediately distinguished through its asymmetric hydrothecae, each with a well-developed abaxial cusp, making the plane of aperture to change from perpendicular to the long axis of the theca, to oblique. Only a few congeners exhibit such a character, viz . S. africana Stechow, 1919, S. antarctica Hartlaub, 1901 b, S. fuegonensis El Beshbeeshy, 2011, S. gaudichaudi (Lamouroux, 1824), S. mediterranea Hartlaub, 1901 b, and S. uruguayensis Mañé-Garzón & Milstein, 1973. Comparative measurements of all these species are given in Table 6. Sertularella africana appears as the closest to S. asymmetra , in having short, unbranched or sparingly branched stems and hydrothecae with “weak transverse annulations on free part of adcauline wall” (Millard 1975). However, there are no submarginal, intrathecal perisarc projections in the hydrotheca and its gonothecae are provided with a different number of spines around the aperture. Sertularella antarctica is not only a larger species, with a characteristic habit (Galea & Schories 2012 a), but its conspicuously thickened hydrothecae are typically shifted on to the anterior side of the colonies (Galea et al . 2009). Sertularella fuegonensis is also a much larger species, with coplanar, profusely ramified colonies, divided into moderately long internodes, each carrying a hydrotheca that is distinctly swollen adaxially, the perisarc there being devoid of corrugations (Galea 2007). Sertularella gaudichaudi builds rather tall, much and irregularly branched colonies, its internodes are long and slender, and its thin-walled hydrothecae are all shifted on to one side (Galea & Schories 2012 b). Comparison of S. asymmetra with specimens of Sertularella mediterranea from southern France showed that the latter have wider stems, as well as larger hydro- and gonothecae. Finally, a reliable comparison with S. uruguayensis is difficult to establish, due major inconsistencies between the size shown on the figure and the measurements given in the original description. Etymology . From the Latin asymmeter (-tra, -trum) , meaning asymmetric, with reference to hydrothecal aperture conspicuously tilted abaxially. Distribution in Chile . Only known from Corral (present study). World records . Not recorded from elsewhere. : Published as part of Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, pp. 1-50 in Zootaxa 3852 (1) on pages 31-32, DOI: 10.11646/zootaxa.3852.1.1, http://zenodo.org/record/286956 : {"references": ["Stechow, E. (1919) Zur Kenntnis des Hydroidenfauna des Mittelmeeres, Amerikas und anderer Gebiete, nebst Angaben uber einige Kirchenpauer'sche Typen von Plumulariden. Zoologische Jahrbucher, 42 (1), 1 - 172.", "Hartlaub, C. (1901 b) Revision der Sertularella - Arten. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg, 16 (2) (1), 1 - 143.", "El Beshbeeshy, M. (2011) Thecate hydroids from the Patagonian shelf (Coelenterata, Hydrozoa, Thecata). G. Jarms (Ed.).", "Lamouroux, J. V. F. (1824) Description des polypiers flexibles. In: Quoy, J. R. C. & Gaimard, J. P. (Eds.), Voyage autour du monde, entrepris par ordre du Roi, execute sur les corvettes de S. M. l'Uranie et la Physicienne, pendant les annees 1817, 1818, 1819 et 1820. Zoologie, Pillet Aine, Paris, pp. 603 - 643.", "Mane-Garzon, F. & Milstein, A. (1973) Una nueva especie del genero Sertularella, Gray, 1847. Revista de Biologia, Uruguay, 1 (1), 19 - 23.", "Millard, N. A. H. (1975) Monograph on the Hydroida of southern Africa. Annals of the South African Museum, 68, 1 - 513.", "Galea, H. R. & Schories, D. (2012 a) Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan. Zootaxa, 3296, 19 - 67.", "Galea, H. R., Haussermann, V. & Forsterra, G. (2009) New additions to the hydroids (Cnidaria: Hydrozoa) from the fjords region of southern Chile. Zootaxa, 2019, 1 - 28.", "Galea, H. R. & Schories, D. (2012 b) Some hydrozoans (Cnidaria) from King George Island, Antarctica. Zootaxa, 3321, 1 - 21."]} |
format |
Text |
author |
Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena |
author_facet |
Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena |
author_sort |
Galea, Horia R. |
title |
Sertularella asymmetra Galea & Schories, sp. nov. |
title_short |
Sertularella asymmetra Galea & Schories, sp. nov. |
title_full |
Sertularella asymmetra Galea & Schories, sp. nov. |
title_fullStr |
Sertularella asymmetra Galea & Schories, sp. nov. |
title_full_unstemmed |
Sertularella asymmetra Galea & Schories, sp. nov. |
title_sort |
sertularella asymmetra galea & schories, sp. nov. |
publisher |
Zenodo |
publishDate |
2014 |
url |
https://dx.doi.org/10.5281/zenodo.6143188 https://zenodo.org/record/6143188 |
long_lat |
ENVELOPE(-62.950,-62.950,-64.900,-64.900) ENVELOPE(16.883,16.883,65.950,65.950) ENVELOPE(-62.880,-62.880,-64.917,-64.917) |
geographic |
King George Island Uruguay Corral Aine Garzón |
geographic_facet |
King George Island Uruguay Corral Aine Garzón |
genre |
Antarc* Antarctica King George Island |
genre_facet |
Antarc* Antarctica King George Island |
op_relation |
http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 http://table.plazi.org/id/DF0FCBB24776FFC6FF51879758F9A5A0 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3852.1.1 http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 http://table.plazi.org/id/DF0FCBB24776FFC6FF51879758F9A5A0 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://dx.doi.org/10.5281/zenodo.6143189 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5281/zenodo.6143188 https://doi.org/10.11646/zootaxa.3852.1.1 https://doi.org/10.5281/zenodo.6143189 |
_version_ |
1766027309379223552 |
spelling |
ftdatacite:10.5281/zenodo.6143188 2023-05-15T13:32:29+02:00 Sertularella asymmetra Galea & Schories, sp. nov. Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena 2014 https://dx.doi.org/10.5281/zenodo.6143188 https://zenodo.org/record/6143188 unknown Zenodo http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 http://table.plazi.org/id/DF0FCBB24776FFC6FF51879758F9A5A0 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3852.1.1 http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 http://table.plazi.org/id/DF0FCBB24776FFC6FF51879758F9A5A0 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://dx.doi.org/10.5281/zenodo.6143189 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella asymmetra article-journal ScholarlyArticle Taxonomic treatment Text 2014 ftdatacite https://doi.org/10.5281/zenodo.6143188 https://doi.org/10.11646/zootaxa.3852.1.1 https://doi.org/10.5281/zenodo.6143189 2022-04-01T11:00:27Z Sertularella asymmetra Galea & Schories, sp. nov. (Figs 6 A, B; 7 A; Table 6) Material examined. Corral, Chaihuin/Huiro, lat. -39.95000, long. - 73.61667, 17.x.2011, 10 m, sample 28: a sterile colony (paratype: MHNG-INVE- 86232); 03.x.2011, 10 m, sample 26: a 2.5 cm high, male colony on sponge (paratype: MHNG-INVE- 86231); 27.x.2011, 10 m, sample 05: a 4.0 cm high female colony on bryozoan (holotype: MHNG-INVE- 86230). Description . Colony arising from creeping, branching, anastomosing hydrorhiza. Stems erect, up to 4 cm high, monosiphonic, spirally twisted at origin from stolon, then divided into internodes by oblique, conspicuous constrictions of the perisarc. Internodes geniculate, each bearing a latero-distal hydrotheca; length varied, though generally short, the adaxial cusp of a hydrotheca reaching or slightly surpassing the base of following hydrotheca (Fig. 6 A). Side branches arising irregularly from below the base of stem hydrothecae, either laterally or slightly displaced towards the front or the rear side of the colony. Branches with the same structure as the stem, delimited from the latter by a constriction of the perisarc. Hydrothecae fusiform, adnate for about one third their adaxial length; free adaxial wall with 2–3 weak transverse ridges; abcauline wall with margin tilted conspicuously (Fig. 6 B 1); aperture facing upwards, composed of four triangular cusps separated by shallow embayments; operculum of four flaps; there are two latero-adaxial and one abaxial internal, submarginal cusps (Fig. 6 B 2). Gonothecae ovoid, walls more or less transversely ridged; male similar to female, though more slender and longer; aperture surrounded by 3–4 perisarc projections in males (Fig. 7 A 2), and 5 in females (Fig. 7 A 1); the latter producing 12–18 rounded oocytes. Remarks . The present species is immediately distinguished through its asymmetric hydrothecae, each with a well-developed abaxial cusp, making the plane of aperture to change from perpendicular to the long axis of the theca, to oblique. Only a few congeners exhibit such a character, viz . S. africana Stechow, 1919, S. antarctica Hartlaub, 1901 b, S. fuegonensis El Beshbeeshy, 2011, S. gaudichaudi (Lamouroux, 1824), S. mediterranea Hartlaub, 1901 b, and S. uruguayensis Mañé-Garzón & Milstein, 1973. Comparative measurements of all these species are given in Table 6. Sertularella africana appears as the closest to S. asymmetra , in having short, unbranched or sparingly branched stems and hydrothecae with “weak transverse annulations on free part of adcauline wall” (Millard 1975). However, there are no submarginal, intrathecal perisarc projections in the hydrotheca and its gonothecae are provided with a different number of spines around the aperture. Sertularella antarctica is not only a larger species, with a characteristic habit (Galea & Schories 2012 a), but its conspicuously thickened hydrothecae are typically shifted on to the anterior side of the colonies (Galea et al . 2009). Sertularella fuegonensis is also a much larger species, with coplanar, profusely ramified colonies, divided into moderately long internodes, each carrying a hydrotheca that is distinctly swollen adaxially, the perisarc there being devoid of corrugations (Galea 2007). Sertularella gaudichaudi builds rather tall, much and irregularly branched colonies, its internodes are long and slender, and its thin-walled hydrothecae are all shifted on to one side (Galea & Schories 2012 b). Comparison of S. asymmetra with specimens of Sertularella mediterranea from southern France showed that the latter have wider stems, as well as larger hydro- and gonothecae. Finally, a reliable comparison with S. uruguayensis is difficult to establish, due major inconsistencies between the size shown on the figure and the measurements given in the original description. Etymology . From the Latin asymmeter (-tra, -trum) , meaning asymmetric, with reference to hydrothecal aperture conspicuously tilted abaxially. Distribution in Chile . Only known from Corral (present study). World records . Not recorded from elsewhere. : Published as part of Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, pp. 1-50 in Zootaxa 3852 (1) on pages 31-32, DOI: 10.11646/zootaxa.3852.1.1, http://zenodo.org/record/286956 : {"references": ["Stechow, E. (1919) Zur Kenntnis des Hydroidenfauna des Mittelmeeres, Amerikas und anderer Gebiete, nebst Angaben uber einige Kirchenpauer'sche Typen von Plumulariden. Zoologische Jahrbucher, 42 (1), 1 - 172.", "Hartlaub, C. (1901 b) Revision der Sertularella - Arten. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg, 16 (2) (1), 1 - 143.", "El Beshbeeshy, M. (2011) Thecate hydroids from the Patagonian shelf (Coelenterata, Hydrozoa, Thecata). G. Jarms (Ed.).", "Lamouroux, J. V. F. (1824) Description des polypiers flexibles. In: Quoy, J. R. C. & Gaimard, J. P. (Eds.), Voyage autour du monde, entrepris par ordre du Roi, execute sur les corvettes de S. M. l'Uranie et la Physicienne, pendant les annees 1817, 1818, 1819 et 1820. Zoologie, Pillet Aine, Paris, pp. 603 - 643.", "Mane-Garzon, F. & Milstein, A. (1973) Una nueva especie del genero Sertularella, Gray, 1847. Revista de Biologia, Uruguay, 1 (1), 19 - 23.", "Millard, N. A. H. (1975) Monograph on the Hydroida of southern Africa. Annals of the South African Museum, 68, 1 - 513.", "Galea, H. R. & Schories, D. (2012 a) Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan. Zootaxa, 3296, 19 - 67.", "Galea, H. R., Haussermann, V. & Forsterra, G. (2009) New additions to the hydroids (Cnidaria: Hydrozoa) from the fjords region of southern Chile. Zootaxa, 2019, 1 - 28.", "Galea, H. R. & Schories, D. (2012 b) Some hydrozoans (Cnidaria) from King George Island, Antarctica. Zootaxa, 3321, 1 - 21."]} Text Antarc* Antarctica King George Island DataCite Metadata Store (German National Library of Science and Technology) King George Island Uruguay Corral ENVELOPE(-62.950,-62.950,-64.900,-64.900) Aine ENVELOPE(16.883,16.883,65.950,65.950) Garzón ENVELOPE(-62.880,-62.880,-64.917,-64.917) |