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Bibliographic Details
Main Author:	Sara A. Quiroz-Barroso
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional Autónoma de México 2012
Subjects:	Ciencias de la Tierra Mxico Pérmico bivalvos gasterópodos Formación Tuzancoa
Online Access:	https://www.redalyc.org/articulo.oa?id=57224778011
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Gasterópodos y bivalvos cisuralianos (Pérmico inferior) de Otlamalacatla, Hidalgo, México Sara A. Quiroz-Barroso Francisco Sour-Tovar Elena Centeno-García Ciencias de la Tierra Mxico Pérmico bivalvos gasterópodos Formación Tuzancoa En esta contribución se reporta la fauna de gasterópodos y bivalvos provenientes de la Formación Tuzancoa en las cercanías del poblado Otlamalacatla, en el noreste del estado de Hidalgo. Los ejemplares están preservados como moldes imperfectos con cierto grado de deformación, lo que dificulta su estudio y limita la precisión de las determinaciones taxonómicas. A pesar de ello, se advierte la presencia de cinco especies de gasterópodos pertenecientes a las familias Bellerophontidae, Omphalotrochidae, Eotomariidae, Naticopsidae y Soleniscidae, y 20 especies de bivalvos de las familias Nuculidae, Mytilidae, Myalinidae, Pterineidae, Bakevellidae, Euchondriidae, Aviculopectinidae, Deltopectinidae, Chaenocardiidae, Streblochondriidae, Heteropectinidae, Acanthopectinidae, Limidae, Schizodidae, Trigoniidae, Astartidae, Sanguinolitidae y Solenomorphidae, que en su mayoría representan su primer registro para México. Las especies determinadas tienen afinidad con faunas del oeste de Texas, que formó parte de la provincia biogeográfica Grandian durante el Pérmico temprano (Cisuraliano). 2012 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57224778011 es http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.1 Vol.29

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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