The brachiopods are often confused by inexperienced eyes to bivalve mollusks, a group that despite its apparent similarity just no link sharing, because their origin and biology are widely disparate. Brachiopods are the righteous protagonists of this new episode of "The value of the fossils" that with this as much as four deliveries.
The Brachiopoda of the brachiopods or Animal Filo is lophotrochozoan (Lophotrochozoa) characterized by having a shell made of two movable blades. Unlike those bivalves, with which they are often confused and have two lateral leaflets more or less symmetrical, the brachiopods are endowed an upper and a lower shell, both clearly different in shape and size. Also the internal anatomy of brachiopods is property, the shell biomineralized, often anchored to the solid substrate by a muscular stalk and buried in galleries dug in the sand in less frequent cases, is held and moved by muscle groups adductors and abductors, enclosing inside the coelom, the central septum, a digestive system often devoid of open sewage and a rudimentary heart and other organs, all covered by a thick mantle. This interesting Filo
made its appearance in the early Cambrian period, for about five hundred and eighty million years, starting from the lophotrochozoan primitive early member of a long evolutionary lineage already had a double shell mineral, which decreased and even disappeared in some adaptive line immediately following, which was extinguished relatively quickly. However, had not completed the Cambrian period when brachiopods had diversified into the three major Superclasses that still remain: The Superclasses Linguliformea \u200b\u200band Craniformea, more primitive constitution, hold the valves together and moved only by the strength of your muscles, while members of the superclass Rhynchonelliformea \u200b\u200bhad a hinge at the rear end of the valves, made by a group of hinges embedded in their respective support holes, the latter also undergo a holometabolous development and lack of sewer, something that sets them apart from their relatives are not metamorphic. At present, only three are still hundreds of brachiopods in shallow aquatic environments, representing a clear edge in decline, but in the past, perhaps half a million of taxa inhabited our planet, the limes have been described more than twelve thousand.
The first example I present inhabited the shallow waters that covered the territory now occupied by Southern Europe during the Devonian period, between three sixty-four hundred and fifteen million years. This particular piece comes from the layers of Ciudad Real, which is very abundant, I mean a Rhynchonelliformea \u200b\u200bcalled Spirifer .
The Brachiopoda of the brachiopods or Animal Filo is lophotrochozoan (Lophotrochozoa) characterized by having a shell made of two movable blades. Unlike those bivalves, with which they are often confused and have two lateral leaflets more or less symmetrical, the brachiopods are endowed an upper and a lower shell, both clearly different in shape and size. Also the internal anatomy of brachiopods is property, the shell biomineralized, often anchored to the solid substrate by a muscular stalk and buried in galleries dug in the sand in less frequent cases, is held and moved by muscle groups adductors and abductors, enclosing inside the coelom, the central septum, a digestive system often devoid of open sewage and a rudimentary heart and other organs, all covered by a thick mantle. This interesting Filo
made its appearance in the early Cambrian period, for about five hundred and eighty million years, starting from the lophotrochozoan primitive early member of a long evolutionary lineage already had a double shell mineral, which decreased and even disappeared in some adaptive line immediately following, which was extinguished relatively quickly. However, had not completed the Cambrian period when brachiopods had diversified into the three major Superclasses that still remain: The Superclasses Linguliformea \u200b\u200band Craniformea, more primitive constitution, hold the valves together and moved only by the strength of your muscles, while members of the superclass Rhynchonelliformea \u200b\u200bhad a hinge at the rear end of the valves, made by a group of hinges embedded in their respective support holes, the latter also undergo a holometabolous development and lack of sewer, something that sets them apart from their relatives are not metamorphic. At present, only three are still hundreds of brachiopods in shallow aquatic environments, representing a clear edge in decline, but in the past, perhaps half a million of taxa inhabited our planet, the limes have been described more than twelve thousand.
The first example I present inhabited the shallow waters that covered the territory now occupied by Southern Europe during the Devonian period, between three sixty-four hundred and fifteen million years. This particular piece comes from the layers of Ciudad Real, which is very abundant, I mean a Rhynchonelliformea \u200b\u200bcalled Spirifer .
Spirifer sp. the same superclass is Pygope Gender, which is rated Family Pygopidae, classified in the Superfamily Dyscolioidea which belongs to the Order and Suborder Terebratulida Terebratulidina. They girdle the species of this genus widely distributed, which are Pygope aspasia, Pygope catulloi, Pygope diphya, Pygope diphyoides Pygope and janitor.
Pygope sp. Rhynchonellida , which is the next example of brachiopods that I offer, is a genus very prolific in their species diversity and above all very persistent over time because despite its early appearance in the period Ordovician, about four hundred fifty million years, survives even today in the form of several species, some of them quite popular in cuisine.
Rhynchonellida sp., Lower Jurassic. Ultimately, I would like to display a well-known species in the Iberian Peninsula, in fact is present in much of Asia, Europe, North America, South America and New Zealand, its nomenclature is Spiriferina Alpine and is a member of the Order Spiriferida, particular is located in the Suborder Spiriferinidina, Family Spiriferinidae, one of the best-known family groups Spiriferinoidea Superfamily. The fossil comes from the Middle Jurassic of Teruel, Spain.
Spiriferina Alpine. Undoubtedly, the brachiopods are a biological group still little known for science, it may be because much of its troops are already part of the fossil record.
In future dates, the fossil record of other beings in the Mirror of Science.
In future dates, the fossil record of other beings in the Mirror of Science.
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