Where are Homoscleromorpha found?
Where are Homoscleromorpha found?
Homoscleromorpha are exclusively marine sponges that tend to encrust on other surfaces at shallow depths. These sponges typically inhabit shady locations, under overhangs and inside caves. In the Mediterranean Sea, 82% of the species in this taxon can be found in caves, and 41% of them are found nowhere else.
What is one example of phylum Porifera?
Give a few examples of Poriferans. Sycon. Spongilla. Hylonema. Cliona.
What are the 4 classes of phylum Porifera?
The phylum Porifera has four classes, namely the Calcarea, Demospongiae, Hexactinellida and Homoscleromorpha. Exclusively marine, calcareous sponges predominantly inhabit shallow tropical waters.
What is an ocean sponge?
Sea sponges are referred to as “filter feeders” because they get the nutrients they need by digesting the plankton, bacteria and other organic material that they filter from the water that passes through the thousands of pores in their bodies; and they eliminate waste the same way.
Is Coelom present in Porifera?
Poriferans have no true coelom hece called as Acoelomates. They have a small cavity called as spongocoel.
Which is the largest class in phylum Porifera?
Class Demospongiae
Demosponges (Class Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database).
What is the order of sponge?
All recent freshwater sponges belong to the suborder Spongillina of the order Haplosclerida (Demospongiae) currently divided into six families, 47 genera, and 238 species (Manconi and Pronzato, 2002, 2007, 2008, 2011; Van Soest et al., 2012).
What is the basis of classification of Porifera?
Complete answer: Porifera is the phylum composed of the sponges. They lack true tissues, have no body symmetry, and are sessile. The classification of phylum Porifera is based upon the presence and composition of spicules.
What kind of sponge is a Homoscleromorpha?
Homoscleromorphs are small sponges, encrusting or lumpy with a smooth surface. Lévi (1973) considered Homoscleromorpha to be a subclass of the class Demospongiae. Molecular studies opposed the phylogenetic relationships of Homoscleromorpha within Demospongiae, and alternative views have been proposed as follows:
Which is the only order in the class Homoscleromorpha?
Homosclerophorida is an order of marine sponges. It is the only order in the monotypic class Homoscleromorpha. The order is composed of two families: Plakinidae and Oscarellidae.
How many sponges are in the phylum Porifera?
Sponges make up the entirety of Phylum Porifera. There are close to 9,000 sponge species, divided into four classes. The largest class of sponge, including almost 8,000 species, is also the most diverse. They can not be characterized by size, as it is constantly changing.
What are the two families of Homosclerophorida?
On the basis of molecular and morphological evidence, the two families Plakinidae and Oscarellidae have been reinstated. There are 117 species in this group divided into 9 genera. The spiculate genera in this group are Aspiculophora, Corticium, Placinolopha, Plakina, Plakinasterella, Plakortis and Tetralophophora .