...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of South American earth sciences >Cretaceous chaetetids (Porifera: Demospongiae) from Mexico: Systematics, palaeoecology, palaeobiogeography, stratigraphy and perspectives
【24h】

Cretaceous chaetetids (Porifera: Demospongiae) from Mexico: Systematics, palaeoecology, palaeobiogeography, stratigraphy and perspectives

机译：来自墨西哥的白垩纪Chaetetids（Porifera：Demospongiae）：Systematics，Paleoecology，Palaeobiography，Stratirigraphy和Perspective

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

especie que se puede encontrar en el estado de Oaxaca. Por el contrario, dos especies del ge ' nero Blastochaetetes, a saber, Blastochaetetes flabellum Michelin y Blastochaetetes reitneri nov. sp. S ' anchez-Beristain y Garcia-Barrera, conforman la diversidad de la localidad de El Gorri ' on. Blastochaetetes reitneri nov sp. S ' anchez-Beristain y GarciaBarrera se puede diferenciar de otras especies del ge ' nero por la presencia de espacios intertabulares que miden no menos de 2 mm y por el grosor de sus t ' abulas (llegando incluso a medir 0.13 mm). Estas son caracteristicas unicas dentro del ge ' nero. Por su parte, Blastochaetetes flabellum Michelin es f ' acilmente reconocible por el patr ' on formado por bandas conce ' ntricas paralelas en la superficie de los ejemplares. Por otro lado, Acanthochaetetes huauclillensis S ' anchez-Beristain y Garcia-Barrera se puede distinguir de otros miembros del ge ' nero Acanthochaetetes por el patr ' on escalariforme formado por las tabulas en las caliculas adyacentes. Paleoecol ' ogicamente, los quete ' tidos mexicanos muestran m ' as o menos las mismas formas de crecimiento -de d ' omica a laminar-, las cuales podrian estar relacionadas con tasas de sedimentaci ' on constante en un ambiente de baja energia (arrecife o ambientes similares a arrecifes). Sin embargo, es posible encontrar microbialitas a menudo asociadas con Acanthochaetetes huauclillensis, mientras que no se pueden encontrar indicios de este tipoA review on the findings of chaetetid sponges in Mexico is made. Up to date, two localities house the whole diversity of Mesozoic chaetetids in the country consisting of three species, all of them from the Cretaceous. The studied localities are Arroyo La Cruz, in the state of Oaxaca, and El Gorri & acute;on, in the state of San Luis Potosi. At Arroyo La Cruz, outcrops from the San Isidro Formation (of a Hauterivian-Barremian age) can be found, whereas Coniacian to Santonian deposits from the Tamasopo Formation can be located at El Gorri & acute;on. Acanthochaetetes huauclillensis S & acute;anchez-Beristain and Garcia Barrera is the only species that can be found in the state of Oaxaca. In contrast, two species of the genus Blastochaetetes, namely Blastochaetetes flabellum Michelin and Blastochaetetes reitneri nov. sp. S & acute;anchez-Beristain and Garcia-Barrera, make up the diversity of the El Gorri & acute;on locality.Blastochaetetes reitneri nov sp. S & acute;anchez-Beristain and Garcia-Barrera can be differentiated from other species in the genus by the presence of intertabular spaces measuring no less than 2 mm, and thick tabulae (as much as 0.13 mm). These are unique features among the genus. For its part, Blastochaetetes flabellum Michelin is easily recognisable by the pattern formed by parallel concentric bands on the surface of the specimens. On the other hand, Acanthochaetetes huauclillensis S & acute;anchez-Beristain and Garcia-Barrera can be distinguished from other members of the genus Acanthochaetetes by the scalariform pattern formed by the tabulae at adjacent calicles. Palaeoecologically, Mexican chaetetid sponges more or less show the same growth forms, from domical to laminar, both of which could be related to constant sedimentation rates in a low-energy environment (reef-or reef-like settings). However, microbialites are often associated to Acanthochaetetes huauclillensis, whereas no hint to these deposits can be found related to Blastochaetetes.Mexican chaetetids also have important palaeobiogeographic and stratigraphic implications. Evidences of Blastochaetetes for the country represent the most recent record for the genus. This could mean that it dispersed westward from Europe, where the oldest records can be found. On the other hand, the finding of Acanthochaetetes in Mexico during the Hauterivian to Barremian implies its dispersion to the Western Tethyan Realm prior to its diversity peak in Europe in the Albian.The fact that Mesozoic deposits are widespread in Mexico implies the possibility of finding multiple specimens in the future, which would deepen the knowledge on these organisms. Moreover, since one of the genera studied here -Acanchochaetetes-is an extant taxon, the possibility of finding well-preserved post-Cretaceous chaetetid specimens for further studies is high.
机译：可以在Oaxaca状态下找到的物种。相比之下，两个物种的GE'nero Blostochaetetes，即Blastochaetetes flabellum michellin和BlastochaetetesReitneri1月。 SP。 S'Cheez-Beristain和Garcia-Barrera，弥补了El Gorri'的多样性。 BlastochaetetesReitneri 11月SP。 S'Anchez-Garciabarraera Beristain，并且可以通过存在的空间贴变，测量不小于2毫米的空间贴变和其厚度t'abulas（甚至测量0.13 mm）的其他物种的区别。这些特征在GE'Nero中是唯一的。同时，Blastochaetetes flabellum michelin是由在样本表面上平行的Conce带状鼻肌上形成的图案'可识别的F'Acilmente。此外，AcanthochaeTetes Huauclillensis S'Cheez-Beristain和Garcia - 屏障可以通过塔卢兰曲线上的曲莲料形成的图案中的GE'NERO acanthochaetetes的其他成员区分开。古食醇'ogicamente，Quete'Mexican Tidos显示M'或更低的次数与d'rship叫做Laminar的生长形式，这可能与低能量环境（或礁环境类似Reef）中的沉积率相关。然而，您可能会发现往往与Huauclillillensis acanthochaete的微生物癖者，而您找不到这一墨西哥Chaetetid海绵的研究结果的证据。迄今为止，两个地方房屋的全部多样化的中生代Chaetetids在全国内组成了三种物种，所有这些来自白垩纪。学习的地方是瓦哈卡州的Arroyo La Cruz，埃尔戈里＆急性;在圣路易斯波罗斯州。在Arroyo La Cruz，可以找到来自San Isidro Childion（Hauterivian-Barremian Age）的露头，而Coniacian从Tamasopo形成的Santonian沉积物可以位于Gorri＆Chute; On。 acanthochaetetes huauclillensis s＆急性; anchez-beristain和garcia barrera，这是oaxaca唯一的ocuentra状态中的唯一物种。相比之下，胚胎属的两个种类，即blastochaetetes flabellum michellin和blastochaetetes reitneri nov。 SP。 S＆急性; Anchez-Beristain和Garcia-Barrera，弥补了El Gorri＆Chute的多样性; Localital.Blastochaetetes Reitneri在11月SP。 S＆急性; Achez-Beristain和Garcia-Bractier可以通过存在的空间测量不小于2mm，厚的塔巴对（高达0.13mm）来区分属于属的其他物种。这些是属的独特的特征。就其部分而言，米其林是通过由标本表面上的并联同心带形成的图案容易识别的凹陷絮凝物。另一方面，Acanthochaetetes Huauclillensis S＆急性; Achez-Beristain和Garcia-Barrera可以通过在相邻CASLICE的塔巴地区形成的凸形图案与刺原属的其他成员区分开来。古生物学上，墨西哥Chaetetid海绵从层流到分子的多或多或少地显示出相同的生长形式，这两者都可能与低能量环境中的沉降恒定速率有关（珊瑚礁或珊瑚礁的设置）。然而，微生物矿石通常与Huauclillensis有关，而没有暗示与Blastchaetetes相关的这些沉积物。此外，这些沉积物也是Chaetetids Palaeobiogeache和地层具有重要意义。该国Blostochaetes的证据代表了属的最新记录。这可能意味着它来自欧洲的西方，可以找到最古老的记录。另一方面，在墨西哥期间发现墨西哥的橡胶成像对欧洲境内欧洲境界的境界多样性之前的哈利亚斯·哈利亚斯，而且在墨西哥普遍普遍认为，这一事实中生代沉积物意味着找到多个的可能性未来标本将深化这些生物的知识。此外，由于这里研究的生成的一只群体是一种远端分类，因此寻找保存良好的Chaetetid后白垩统样本的可能性高。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号