کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9538941 | 1359948 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The upper Cenomanian (Cretaceous) ammonite Neolobites vibrayeanus (d'Orbigny, 1841) in the Middle East: taxonomic and palaeoecologic remarks
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The upper Cenomanian (Cretaceous) ammonite Neolobites vibrayeanus (d'Orbigny, 1841) in the Middle East: taxonomic and palaeoecologic remarks The upper Cenomanian (Cretaceous) ammonite Neolobites vibrayeanus (d'Orbigny, 1841) in the Middle East: taxonomic and palaeoecologic remarks](/preview/png/9538941.png)
چکیده انگلیسی
In the Middle East and Africa, the Cenomanian ammonite genus Neolobites occurs, partly in great abundance, in shallow marine shelf settings. The genus includes several species but it has remained uncertain to what extent these species reflect biospecies, chronospecies or morphological variants. Based on material from Jordan and Egypt, the morphological variation of Neolobites vibrayeanus is described and discussed. From the several species of Neolobites described in the literature, only N. vibrayeanus, N. fourtaui and N. peroni appear to deserve specific separation. Sedimentological and lithological data, notably the common occurrence in strata that were possibly deposited above storm wave base, suggest that Neolobites was able to inhabit shallow marine settings. In these settings, it seems to form a distinct assemblage with the nautiloid Angulithes. Although N. vibrayeanus shows morphological variability between distinct populations, local N. vibrayeanus assemblages seem to develop morphologically stable populations that show only a little morphological overlap with those of other areas. This may be the reason for the earlier taxonomic splitting. The occurrence in habitats in which other stratigraphically significant ammonites are often missing may be the reason for the previous poor dating of Neolobites assemblages.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cretaceous Research - Volume 26, Issue 6, December 2005, Pages 930-946
Journal: Cretaceous Research - Volume 26, Issue 6, December 2005, Pages 930-946
نویسندگان
Frank Wiese, Frauke Schulze,