کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4469137 1622360 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new earthworm trace fossil from paleosols: Aestivation chambers from the Late Pleistocene Sopas Formation of Uruguay
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
A new earthworm trace fossil from paleosols: Aestivation chambers from the Late Pleistocene Sopas Formation of Uruguay
چکیده انگلیسی

A new ichnotaxon, attributed to earthworm aestivation chambers, is described from paleosols of the Sopas Formation (Upper Pleistocene) of northern Uruguay. This ichnofossil consists of a spherical chamber with a constructed wall of imbricated faecal pellets and a filling of rounded to meniscate pellets arranged in winding strings. The strings may also be connected to specimens of Taenidium serpentinum in the paleosol, resulting in a compound trace fossil. Castrichnus incolumis igen. et isp. nov. is interpreted as an earthworm aestivation chamber based on its morphological similarity to the chambers produced by extant earthworms. As such, C. incolumis is considered an indicator of subaerial exposure, and also of seasonal climate. C. incolumis is the second trace fossil that can be attributed with certainty to earthworms. In addition, the Castrichnus–T. serpentinum compound specimens indicate that in paleosols, earthworms can be the producers of T. serpentinum. Aestivation chambers would represent a new ethological category.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 243, Issues 3–4, 22 January 2007, Pages 339–347
نویسندگان
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