General characters
Class of chelicerated arthropods with a great variety of shapes but with many common characteristics.
Inside the arthropods represents the group with four pairs of articulated legs.
They have segmented bodies, but the segments are not as visible; The most obvious is the division of the body into "head" (actually, head and thorax joined together) and abdomen.
They have six pairs of articulated appendages.
Quelíceros: lº pair of appendages with nail, sometimes poisonous, to capture and take the food to the mouth.
Pedipalpos: 2nd pair of appendages more developed than the first.
4 pairs of articulated legs intended for locomotion.
Cephalotorax:
The mouth without chewing apparatus works as a suction organ.
Simple eyes other than other arthropods.
Abdomen or opistosoma
Ganglionic nervous system
Breathing through tubular tracheas or lung sacs
Sometimes, with silk-producing serine glands
Separated sexes and development generally without metamorphosis
The orders of arachnids are the following:
- Scorpions
- Pseudoscorpions
- Solifugees
- Palpígrados
- Uropigios
- Amblipigios
- Arachnids or spiders
- Opiliones
- Mites
Scorpions
Scorpions are arachnids spread throughout warm and temperate regions.
They live under stones, logs, firewood, and feed on insects and small animals.
Its sting is usually not dangerous, but large tropical scorpions, with their potent poison, can even cause death.
Scorpions breathe through lungs and are viviparous.
They have small chelaceros and large pedipalps.
They have a poisonous nail.
Pseudoscorpions
Small arachnids of about 8 mm, similar to scorpions.
Silk glands in the pedipalps.
Solifugals
With highly developed poisonous chelyces. About 8 cm in length and very voracious.
Uropigios
Between 3 mm and 7 cm, with large pedipalps with tweezers. Predators that attack even slugs.
They can release an irritating liquid.
Palpigrados
About 5 mm long, with a scourge in the abdomen.
They are not poisonous and they are also blind. They live under the stones.
Amblipigios
Largely developed legs with powerful clamps on the pedipalps.
First pair of legs as long filaments. About 5 cm.
Araneids
It is the most important group of arachnids, which includes all spiders, with about 30,000 species.
The abdomen is attached to the cephalothorax by a peduncle, and the chelycers have poisonous glands.
They have 3 pairs of rows that secrete silk, with which they build the fabrics.
The spider uses the thread to move and also leaves another silk thread.
Opiliones
They are small arachnids with elongated pedipalps and very long legs.
The cephalothorax and abdomen have a shield or shell.
They do not make fabrics and are harmless.
Acaros
They are small arachnids; some microscopic, with very different shapes.
Some are predators and other parasites of animals and plants.
Ticks attack the animals and the scabies plow digs galleries into human skin.
Other information about fauna in Aragón:
A small list of species in Aragon would be the following:
| Vertebrates | Invertebrates |
|---|---|
MammalsBirdsReptilesAmphibiansFishes |
MetazoansProtozoa |
|
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.