Celomados Invertebrates Animal Kingdom. Wildlife. Fauna. Zoology.

The Celomados comprise the Bilaterals in which the mesoderm comes mainly from the endoderm and they have a true celloma, consisting of a cavity completely covered by mesodermal tissue. However, this celloma can occur in various ways.

There are two lines within the Celomados:

• Protostomes,
  in which the first opening formed in the embryo is maintained in adults as a mouth,
• Deuteróstomos,
  in which the first opening is transformed into anus and a new one appears that will be the adult's mouth.

Protostomes

They are celomados animals with mosaic development and spiral segmentation. They can have various larval forms or lack them completely. In the most evolved groups the internal segmentation of the body appears.

Prototomes include the following groups: Foronids, Ectoprocts, Brachiopods, Molluscs, Sipunculoideos, Annelids, Equiuroideos, Oncóforos and Arthropods.

Foronideos

They are a small group of marine organisms (between the coast and up to 50 meters), with a worm-shaped body and crown of tentacles around the mouth. They can form colonies or groupings of several individuals.
Your body is protected with a chitinous tube that adheres to rocks or shells of mollusks or buried in the sand. They measure from a few millimeters to about 20 cm of length. The tube is usually 2 or 3 times larger than the animal and is menbranous in nature with sand grains and other materials inlaid. They have a crown of tentacles around the mouth, which constitutes the lophophore.
The tentacles have vibrating cilia with which they produce a movement that attracts food to the mouth.

Ectoproctos or Briozoos

They are abundant animals on the coast and shallow seas and a few live in fresh water. They live in arborescent colonies, sometimes in the form of sheets, sometimes as algae, constituted by thousands of horny or calcareous baskets where animals live. They have no differentiated circulatory system and breathe through the tentacles.

The digestive tract is U-shaped and consists of a mouth, ciliated and muscular pharynx, esophagus, stomach, intestine and anus, which flows near the mouth, but outside the phosphorus.

The nervous system is formed by a cerebroid ganglion between the anus and the mouth, a nervous ring around the base of the lophophore and a nervous plexus, which is located on the body wall.

Most are hermaphrodites and fertilization takes place inside the celoma. The segmentation is radial and gives rise to two different types of larvae.

Brachiopods

They are marine animals protected by a shell with two leaflets, with pores located dorsally and ventrally, that open and close using muscles, similar to bivalve molluscs.
They are fixed to the seabed by means of a peduncle. They have the lofóforo or tentacles in two arms coiled in spiral. The U-shaped digestive tract has digestive glands.

They have generally separated sexes, although they can be hermaphroditic, the fertilization is external.

There are two distinct groups of Brachiopods:

• Ecardines or Inarticulate: The two leaflets are joined to the body by muscles. The digestive tract is complete with mouth and anus.
• Testicardines or Articulated: The two shells of the shell are connected directly to each other by means of a hinge. The digestive tract is blind, lacks anus. The system Nervous, very simple, it consists of a cerebroid ganglion, a periesophageal ring and a series of nerves.



Other information about fauna in Aragón:

A small list of species in Aragon would be the following:

Vertebrates	Invertebrates
Mammals Red squirrel. Bear. Fox. Artiodactyl Ungulates Deer. Wild pig. Birds Classification of Birds Storks. Capercaillies. Reptiles Amphibians Urodelos.    Marbled Triton.    Webbed Triton.    Pyrenean triton. Anurans. Fishes	Metazoans Arthropods Myriapods Insects Arachnids Spiders Crustaceans Annelids Worm Molluscs Asquelmintos Platelmintos Celentereos Porifera Protozoa
images about the fauna in Aragon.    photographs on invertebrates.    beneficial animals for agriculture.

Also Aragon enjoys a diverse and varied Nature where passing by plants, animals, Geology, or landscapes we can arrive at a fantastic bestiary that lives in its monuments.

The information will not be complete without a stroll by its three provinces, with shutdown in some of its spectacular landscapes like Ordesa, the Moncayo, Monegros or by opposition the Ebro.

Also you can dedicarte to the intangible ones: from the legend compilation that also does to universal Aragon.