scholarly journals A Mississippian hexactinellid sponge from the Western Gondwana: Taxonomic and paleobiogeographic implications

2018 ◽  
Vol 63 ◽  
Author(s):  
Marcelo Carrera ◽  
Juan Rustan ◽  
Norberto Vaccari ◽  
Miguel Ezpeleta
Keyword(s):  
Hexactinellid Sponge

A new species of glass sponge (Hexactinellida: Sceptrulophora: Uncinateridae) from the Weijia Seamount in the northwestern Pacific Ocean

Zootaxa ◽  
2020 ◽  
Vol 4878 (2) ◽  
pp. 322-334
Author(s):  
CHENGCHENG SHEN ◽  
DONGSHENG ZHANG ◽  
BO LU ◽  
CHUNSHENG WANG
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Glass Sponge ◽  
Body Form ◽  
Hexactinellid Sponge ◽  
The Family ◽  
Molecular Phylogenetic ◽  
A New Species

In this article we report on a hexactinellid sponge new to science, Tretopleura weijicus sp. nov., which was collected from the Weijia Seamount in the northwestern Pacific Ocean at a depth of 1995 m. Its blade-like and branching body form, the primary choanosomal framework consisting of multiaxial longitudinal strands without synapticula, and the presence of sceptrules suggest placement within the family Uncinateridae Reiswig, 2002, which is also supported by molecular phylogenetic evidence from COI and 16S sequences. The absence of swollen dermal spurs or regular pentactins and the presence of two types of discohexasters characterize it as a new species. More specimens should be collected to revise the generic characters.

A new glass sponge genus (Hexactinellida: Euplectellidae) from abyssal depth of the Yap Trench, northwestern Pacific Ocean

Zootaxa ◽  
2019 ◽  
Vol 4567 (2) ◽  
pp. 367 ◽  
Author(s):  
CHENGCHENG SHEN ◽  
MARTIN DOHRMANN ◽  
DONGSHENG ZHANG ◽  
BO LU ◽  
CHUNSHENG WANG
Keyword(s):  
Pacific Ocean ◽  
New Genus ◽  
First Record ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Body Form ◽  
Intraspecific Divergence ◽  
Molecular Approaches ◽  
Hexactinellid Sponge ◽  
Molecular Phylogenetic

In this article we report on a hexactinellid sponge new to science, Rhizophyta yapensis gen. et sp. nov., which was collected from the Yap Trench in the northwestern Pacific Ocean at an abyssal depth of 4159–4779 m. Its fungus-like body form with long peduncle and absence of hypodermalia suggest placement within the euplectellid subfamily Bolosominae Tabachnick, 2002, whereas molecular phylogenetic evidence suggests that it is sister to all remaining Euplectellidae Gray, 1867. Its rhizophytous method of attachment to the substrate, hitherto unknown from bolosomine Euplectellidae, a veil of pentactins covering the peduncle, and the presence of toothed discohexasters as the only type of microscleres, clearly characterize it as a new genus. The intraspecific divergence between holotype and paratypes of the new species is examined with both morphological and molecular approaches. This report represents the first record of a hexactinellid sponge from the Yap Trench. 

Silurian hexactinellid sponges from northern British Columbia, Canada

1998 ◽  
Vol 72 (2) ◽  
pp. 202-220 ◽  
Author(s):  
J. Keith Rigby ◽  
Joanne L. Nelson ◽  
B. S. Norford
Keyword(s):  
British Columbia ◽  
New Species ◽  
Black Shale ◽  
Continental Margin ◽  
Early Paleozoic ◽  
Hexactinellid Sponge ◽  
Hexactinellid Sponges

Faunules of largely hexactinellid sponges have been collected from siltstones of Early Silurian Wenlock or latest Landovery age within the upper Road River Group from northern British Columbia. The assemblages include the new species: Protospongia columbiana, Hexatractiella pseudonevadensis and Cyathophycus akiensis. Other taxa described include the hexactinellids Protospongia conica Rigby and Harris, 1979, Hexatractiella nevadensis (Rigby and Stuart, 1988), Diagoniella sp., Gabelia pedunculus? Rigby and Murphy, 1983, and a specimen of the monaxonid demosponge Wareiella typicala Rigby and Harris, 1979. Also included is a fragment of what must have been a steeply obconical-cylindrical hexactinellid sponge of uncertain taxonomy; it has a skeleton of robust hexactines in an unquadruled net, above a root-tuft of 10-20 spicules. Other sponge impressions include small circular clusters of hexactines with radiating, to basketlike patterns and somewhat similar, isolated and dissociated, long probably roof tuft spicules and possible basal root tuft rosettes of monaxons. The faunules are similar to other outer continental margin, black shale, sponge assemblages of the Early Paleozoic Era, and include elements previously described from northern British Columbia and central Nevada.

Diatom invasion in the antarctic hexactinellid sponge Scolymastra joubini

Polar Biology ◽  
2000 ◽  
Vol 23 (6) ◽  
pp. 441-444 ◽  
Author(s):  
Carlo Cerrano ◽  
Attilio Arillo ◽  
Giorgio Bavestrello ◽  
Barbara Calcinai ◽  
Riccardo Cattaneo-Vietti ◽  
...  
Keyword(s):  
Hexactinellid Sponge ◽  
The Antarctic

Hierarchical assembly of the siliceous skeletal lattice of the hexactinellid sponge Euplectella aspergillum

2007 ◽  
Vol 158 (1) ◽  
pp. 93-106 ◽  
Author(s):  
James C. Weaver ◽  
Joanna Aizenberg ◽  
Georg E. Fantner ◽  
David Kisailus ◽  
Alexander Woesz ◽  
...  
Keyword(s):  
Hierarchical Assembly ◽  
Hexactinellid Sponge
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