Rhizaxinella nuda Wilson 1925
Rhizaxinella cf. nuda Wilson, 1925 (Fig. 15) Synonymy Rhizaxinella nuda— Wilson 1925: 352 –353, pl. 38 (fig. 5). Description External morphology. Small clubshaped sponges with rather damaged stalks (figs. 15 A–E). Their height varies from 0.6 to 2.1 cm. The surface is velvety, greyish. Consistency...
Main Authors: | , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2008
|
Subjects: | |
Online Access: | https://zenodo.org/record/6235809 https://doi.org/10.5281/zenodo.6235809 |
id |
ftzenodo:oai:zenodo.org:6235809 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:6235809 2023-05-15T14:05:23+02:00 Rhizaxinella nuda Wilson 1925 Plotkin, Alexander S. Janussen, Dorte 2008-12-31 https://zenodo.org/record/6235809 https://doi.org/10.5281/zenodo.6235809 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03E887DC5E75FF995EC9111DFB78A8A1 doi:10.5281/zenodo.183878 http://publication.plazi.org/id/FFD1FFA45E6AFFB85E5E1447FFB3AA43 doi:10.5281/zenodo.183894 doi:10.5281/zenodo.6235808 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6235809 https://doi.org/10.5281/zenodo.6235809 oai:zenodo.org:6235809 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Polymastiidae and Suberitidae (Porifera: Demospongiae: Hadromerida) of the deep Weddell Sea, Antarctic *, pp. 95-135 in Zootaxa 1866 126-128 Biodiversity Taxonomy Animalia Porifera Demospongiae Hadromerida Suberitidae Rhizaxinella Rhizaxinella nuda info:eu-repo/semantics/other publication-taxonomictreatment 2008 ftzenodo https://doi.org/10.5281/zenodo.623580910.5281/zenodo.18387810.5281/zenodo.18389410.5281/zenodo.6235808 2023-03-10T18:25:59Z Rhizaxinella cf. nuda Wilson, 1925 (Fig. 15) Synonymy Rhizaxinella nuda— Wilson 1925: 352 –353, pl. 38 (fig. 5). Description External morphology. Small clubshaped sponges with rather damaged stalks (figs. 15 A–E). Their height varies from 0.6 to 2.1 cm. The surface is velvety, greyish. Consistency is rather soft. A contracted osculum is located slightly eccentrically on the top of main body. Skeleton. The choanosomal skeleton is constituted by the principal tylostyles arranged more or less radially and grouped in tracts or bundles (fig. 15 F). The ectosomal skeleton is formed by the bouquets of small tylostyles, densely packed and intermingled. Skeleton of the stalk not observed because of considerable damage of the latter. Spicules. Altogether 120 spicules from 2 specimens were measured. Two size categories are well distinguished. The number of measured spicules of each category is given below, separately for each specimen (n 1, n 2). Both principal and ectosomal spicules possess welldeveloped spherical tyles. Principal tylostyles are slightly fusiform and straight (fig. 15 G). Their dimensions are: length 11501759 2318 µm, tyle diameter 17 18.9 21 µm, diameter of the shaft underneath the tyle 1314.3 15 µm, maximal diameter of the shaft 1316.2 21 µm (n 1 = 30, n 2 = 30). Ectosomal tylostyles are isodiametric, straight or slightly curved (fig. 15 H). They measure: length 450551 690 µm, tyle diameter 913.7 18 µm, diameter of the shaft underneath the tyle 7 9.0 11 µm, maximal diameter of the shaft 810.1 13 µm (n 1 = 30, n 2 = 30). Spicules of the stalk were not observed. Type locality: NW Pacific: Philippines: Mindanau Island: Iligan Bay, 814 m. Distribution (other than type locality): NW Pacific: Philippines: E. Cebu, 710 m (Lévi 1964). Antarctic: Northern Weddell Sea, 2080–2620 m (present study). Remarks We allocated the specimens studied to R. nuda due to the similarities of main body shape and skeleton architecture. However, it was done with some doubt because our sponges have smaller ... Other/Unknown Material Antarc* Antarctic Weddell Sea Zenodo Antarctic Weddell Sea Pacific Weddell |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Porifera Demospongiae Hadromerida Suberitidae Rhizaxinella Rhizaxinella nuda |
spellingShingle |
Biodiversity Taxonomy Animalia Porifera Demospongiae Hadromerida Suberitidae Rhizaxinella Rhizaxinella nuda Plotkin, Alexander S. Janussen, Dorte Rhizaxinella nuda Wilson 1925 |
topic_facet |
Biodiversity Taxonomy Animalia Porifera Demospongiae Hadromerida Suberitidae Rhizaxinella Rhizaxinella nuda |
description |
Rhizaxinella cf. nuda Wilson, 1925 (Fig. 15) Synonymy Rhizaxinella nuda— Wilson 1925: 352 –353, pl. 38 (fig. 5). Description External morphology. Small clubshaped sponges with rather damaged stalks (figs. 15 A–E). Their height varies from 0.6 to 2.1 cm. The surface is velvety, greyish. Consistency is rather soft. A contracted osculum is located slightly eccentrically on the top of main body. Skeleton. The choanosomal skeleton is constituted by the principal tylostyles arranged more or less radially and grouped in tracts or bundles (fig. 15 F). The ectosomal skeleton is formed by the bouquets of small tylostyles, densely packed and intermingled. Skeleton of the stalk not observed because of considerable damage of the latter. Spicules. Altogether 120 spicules from 2 specimens were measured. Two size categories are well distinguished. The number of measured spicules of each category is given below, separately for each specimen (n 1, n 2). Both principal and ectosomal spicules possess welldeveloped spherical tyles. Principal tylostyles are slightly fusiform and straight (fig. 15 G). Their dimensions are: length 11501759 2318 µm, tyle diameter 17 18.9 21 µm, diameter of the shaft underneath the tyle 1314.3 15 µm, maximal diameter of the shaft 1316.2 21 µm (n 1 = 30, n 2 = 30). Ectosomal tylostyles are isodiametric, straight or slightly curved (fig. 15 H). They measure: length 450551 690 µm, tyle diameter 913.7 18 µm, diameter of the shaft underneath the tyle 7 9.0 11 µm, maximal diameter of the shaft 810.1 13 µm (n 1 = 30, n 2 = 30). Spicules of the stalk were not observed. Type locality: NW Pacific: Philippines: Mindanau Island: Iligan Bay, 814 m. Distribution (other than type locality): NW Pacific: Philippines: E. Cebu, 710 m (Lévi 1964). Antarctic: Northern Weddell Sea, 2080–2620 m (present study). Remarks We allocated the specimens studied to R. nuda due to the similarities of main body shape and skeleton architecture. However, it was done with some doubt because our sponges have smaller ... |
format |
Other/Unknown Material |
author |
Plotkin, Alexander S. Janussen, Dorte |
author_facet |
Plotkin, Alexander S. Janussen, Dorte |
author_sort |
Plotkin, Alexander S. |
title |
Rhizaxinella nuda Wilson 1925 |
title_short |
Rhizaxinella nuda Wilson 1925 |
title_full |
Rhizaxinella nuda Wilson 1925 |
title_fullStr |
Rhizaxinella nuda Wilson 1925 |
title_full_unstemmed |
Rhizaxinella nuda Wilson 1925 |
title_sort |
rhizaxinella nuda wilson 1925 |
publishDate |
2008 |
url |
https://zenodo.org/record/6235809 https://doi.org/10.5281/zenodo.6235809 |
geographic |
Antarctic Weddell Sea Pacific Weddell |
geographic_facet |
Antarctic Weddell Sea Pacific Weddell |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_source |
Polymastiidae and Suberitidae (Porifera: Demospongiae: Hadromerida) of the deep Weddell Sea, Antarctic *, pp. 95-135 in Zootaxa 1866 126-128 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03E887DC5E75FF995EC9111DFB78A8A1 doi:10.5281/zenodo.183878 http://publication.plazi.org/id/FFD1FFA45E6AFFB85E5E1447FFB3AA43 doi:10.5281/zenodo.183894 doi:10.5281/zenodo.6235808 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6235809 https://doi.org/10.5281/zenodo.6235809 oai:zenodo.org:6235809 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.623580910.5281/zenodo.18387810.5281/zenodo.18389410.5281/zenodo.6235808 |
_version_ |
1766277208174755840 |