Sponges without skeleton: A new Mediterranean genus of Homoscleromorpha (Porifera, Demospongiae)

@article{BouryEsnault1995SpongesWS,
  title={Sponges without skeleton: A new Mediterranean genus of Homoscleromorpha (Porifera, Demospongiae)},
  author={Nicole Boury‐Esnault and Guilherme Muricy and Marie-France Gallissian and Jean Vacelet},
  journal={Ophelia},
  year={1995},
  volume={43},
  pages={25-43}
}
Abstract A new genus of aspiculate homoscleromorph, Pseudocorticium, is described along with the new species P. jarrei found in a littoral cave located in the western Mediterranean Sea (France). The anatomy and cell composition are described and compared to that of species of the other homoscleromorph genus without skeleton, Oscarella, and to genera with skeleton, Corticium and Plakina. The new sponge differs from Oscarella in its morphology, anatomy, and cytology. An emended definition of the… 
Cytological evidence for cryptic speciation in Mediterranean Oscarella species (Porifera, Homoscleromorpha)
TLDR
Three new sponge species without a skeleton, Oscarella viridis, O. microlobata, and O. imperialis, were found in sublittoral caves and on vertical walls along the coast of Provence and reveals an unexpected biodiversity of this genus in the Mediterranean Sea.
A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan
Oscarella malakhovi sp. nov. is described from the waters of Peter the Great Bay (northwestern Sea of Japan, Russia) at depths between 0.4–4 m from a rocky coast. This is the first record of the
Descriptions of new sponge species and genus, including aspiculate Plakinidae, overturn the Homoscleromorpha classification
TLDR
The need for a detailed re-examination of Homoscleromorpha is indicated using this integrative taxonomic approach and two new species of Plakinidae from submarine caves in the Caribbean Sea are described: Plakina arletensis sp.
Taxonomic revision of the Mediterranean Plakina Schulze (Porifera, Demospongiae, Homoscleromorpha)
TLDR
Accurate analysis of the internal anatomy and of the shape and ramification pattern of lophose spicules in scanning electron microscopy provides new, powerful morphological criteria for species discrimination in Plakina, thus generating an increase in estimates of the biodiversity of plakinids.
Oscarella balibaloi, a new sponge species (Homoscleromorpha: Plakinidae) from the Western Mediterranean Sea: cytological description, reproductive cycle and ecology
TLDR
It is shown that this homoscleromorph sponge species is becoming abundant in several locations and has a peculiar habit, often overgrowing massive sponges, gorgonians or some erected bryozoans.
Taxonomy of Plakina (Porifera: Homoscleromorpha) from Aegean submarine caves, with descriptions of three new species and new characters for the genus
TLDR
Five species of the homoscleromorph genus Plakina are described from submarine caves in the Aegean Sea (Lesvos Island, Greece) with exceptionally stout, annulated lophose spicules with highly variable ramification patterns, including some original types.
No longer Demospongiae: Homoscleromorpha formal nomination as a fourth class of Porifera
TLDR
Within the currently more widely accepted hypothesis of a monophyletic Porifera, it is formally proposed here to raise Homoscleromorpha to the class rank (the fourth one), following the PhyloCode.
Five new species of Homoscleromorpha (Porifera) from the Caribbean Sea and re-description of Plakina jamaicensis
Five new species of Homoscleromorpha (Porifera) of four genera, Oscarella, Plakortis, Plakina and Corticium, are described from vertical walls of reef caves at depths ranging from 23 to 28 m in the
Taxonomy of some halisarcida and homosclerophorida (Porifera: Demospongiae) from the indo‐pacific
TLDR
Another genus belonging to a different subclass of Demospongiae also has fragile construction and encrusting growth form; this is Oscarella, and two new species of this genus are also described, O. stillans sp.
Molecular Phylogeny Restores the Supra-Generic Subdivision of Homoscleromorph Sponges (Porifera, Homoscleromorpha)
TLDR
This study proposes to restore the pre-1995 subdivision of Homoscleromorpha into two families: Plakinidae Schulze, 1880 for spiculate species and Oscarellidae Lendenfeld, 1887 for aspiculate species that had been rejected after the description of the genus Pseudocorticium.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 15 REFERENCES
Comparative study of the choanosome of Porifera: 1. The Homoscleromorpha
TLDR
These two families of sponges have the following morphological features in common: flagellated endopinacocytes with short apical microvilli and basal pseudopods; the presence of a very thin and dense sheet of matrix material which limits the mesohyl.
Biochemical genetic divergence and systematics in sponges of the genera Corticium and Oscarella (Demospongiae: Homoscleromorpha) in the Mediterranean Sea
TLDR
It was found that the new sponge was reproductively isolated from sympatric C. candelabrum, with 6 of 16 loci proving diagnostic, and it was concluded that all homoscleromorph sponges should be placed in the single family Plakinidae.
The value of cytological criteria in distinguishing sponges at the species level: the example of the genus Polymastia
TLDR
It is concluded that cytological criteria can be used for the identification of sponges at the species level, and that these criteria may provide useful information about phylogenetic relationships among spongees belonging to genera with many species and a wide geographical distribution.
A revision of the supraspecific classification of the orders dictyoceratida dendroceratida and verongida class demospongiae
A reappraisal of all existing generic taxa within the group of Demospongiae lacking a mineral skeleton, and formerly referred to as the order Keratosa, has resulted n a new classification. Three or...
Genetic and cytological divergence between colour morphs of the Mediterranean sponge Oscarella lobularis Schmidt (Porifera, Demospongiae, Oscarellidae)
TLDR
The demosponge Oscarella lobularis has been reported from various localities throughout the world and is considered to be morphologically very variable, and morphs of different colour or texture can be found living sympatrically.
Chemotaxonomy of Marine Sponges: Families Microcionidae, Raspailiidae and Axinellidae, and their Relationships with other Families in the Orders Poecilosclerida and Axinellida (Porifera : Demospongiae)
TLDR
Biochemical data provided a measure of support for the removal of Raspailiidae to Poecilosclerida, and the division of Axinellidae into several families, as proposed independently in recent revisions based on morphological evidence.
Free amino acid patterns and the classification of the Demospongiae
TLDR
Of interest are the suggestions that the order Choristida is in itself a heterogeneous group, and that certain genera now placed in the order Axinellida may in fact be more closely related to the Poecilosclerida.
...
1
2
...