![]() ![]() The body of the burrowing anemones can be divided in three sections (capitulum, scapus and physa). The tentacles can be organized in different rings around the mouth or they can round off the oral surface completely. They own a pedal disc with which they fix to hard objects, or their base is modified to drill the soft substrate of the sea floor. They are solitary organisms that lack hard parts, which present only the poly phase in their life cycle. These belong to the actiniarians group, anthozoan cnidaria commonly called sea anemone. The fossil specimens here studied are similar in its external and internal morphology to burrowing anemones. Palaeoanemone belongs to a rare case of fossilization of a solitary polyp of anthozoan cnidaria, in which it was possible to identify numerous anatomical features, as well as traces of its activity in the sediment. Palabras clave: Cnidaria Actiniaria Morfología Interna Carbonífero Argentina.Ī review of the actiniarian: Palaeoanemona marcusi, previously described by Lech (1986b) for carboniferous marine rocks of San Juan, Argentina, allowed for the recognition of part of the internal morphological characters, not observed before. El conocimiento anatómico que se tiene de la morfología de este género es ampliado al describirse detalles de las paredes de su cuerpo, peristoma y faringe, así como mesenterio y tentáculos. Palaeoanemone es un caso excepcional de fosilización de estos organismos en el que se preservo parte de su morfología tanto externa como interna. Las rocas del Carbonífero marino de Argentina presentes numerosas asociaciones de invertebrados entre los que se puede encontrar anémonas cavadoras como así también rastros de su actividad biológica. Resumen: Morfología interna de Palaeoanemone (Cnidaria: Actinaria): anémona cavadora del Carbonífero de la Argentina. Key words: Cnidaria Actiniaria Inner Morphology Carboniferous Argentina. The anatomical knowledge that is known about the morphology of this genus is enlarged by observing details of the walls of their body, peristome and pharynx, as well as mesenteries and tentacles. Palaeoanemone is an exceptional case of fossilization of these organisms, preserving its morphology both external and internal. E-mail: The rocks of marine carboniferous of Argentina present numerous associations of invertebrates, among which can be found burrowing anemones and also traces of its biological activity. ![]() ![]() Cuando es molestada, segrega sustancias muy urticantes que pueden causar escoceduras más o menos graves a nivel cutáneo.Inner morphology of Palaeoanemone (Cnidaria: Actiniaria): a burrowing anemone of the Carboniferous of ArgentinaġCentro Nacional Patagónico-CONICET, Brown 2915, (9120) Puerto Madryn, Chubut, Argentina.When disturbed, very stinging secretes substances that can cause more or less serious skin rashes level.-Entre los tentáculos pueden encontrarse organismos de otras especies, que establecen asociaciones más o menos estrechas con la anémona: desde arañas de mar como Maja crispata, hasta decápodos como Periclimenes, cangrejos como Scyllarus arctus o Inachus phalangium, o peces como Gobius bucchichii o Chromis chromis.Notes:Īmong those tentacles can be found bodies of other species, which provide more or less close association with anemone: from sea spiders as Maja crispata until prawns as Periclimenes, crabs as Scyllarus arctus or Inachus phalangium or fish as Gobius bucchichii or Chromis chromis. Habitat:Įntre las grietas de las rocas a orillas del Mar Mediterráneo. In addition, the tips of the tentacles usually show a purple or pink coloring. While the cylindrical body can be white, yellow, green or red, tentacles, little retractable and very fragile, may display different tones depending on the depth dwelling anemone, which is directly related to the absence / presence of symbiotic algae inside: deepwater acquires grayish coloration, while in surface waters has bright green hues due to endosymbiotic zooxanthellae. This anemone Actiniidae family has a column of up to 10 cm tall, a base of approximately 7cm in diameter which is slightly adhesive and suction, and has up to 200 tentacles, arranged in six crowns around the mouth opening, up to 20 cm in length. ![]()
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