کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5788223 | 1642274 | 2017 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A fossil freshwater crab from the Pliocene Tatrot Formation (Siwalik Group) in Northern India (Crustacea, Brachyura, Potamidae)
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A fossil freshwater crab from the Pliocene Tatrot Formation (Siwalik Group) in Northern India (Crustacea, Brachyura, Potamidae) A fossil freshwater crab from the Pliocene Tatrot Formation (Siwalik Group) in Northern India (Crustacea, Brachyura, Potamidae)](/preview/png/5788223.png)
چکیده انگلیسی
We describe a fossil freshwater crab specimen from the Tatrot Formation, Siwalik Group, of Northern India. We assign this specimen on the basis of morphology of the anterolateral margin, which is comparable to the extant species Acanthopotamon martensi (Wood-Mason, 1875) in the Ganges valley. We re-interpret previously described claw fragments from the same formation that have been assigned to the gecarcinucid species Sartoriana spinigera (Wood-Mason, 1871). This casts doubt on previous approaches to calibrate a molecular clock for primary freshwater crabs that used these fossils as minimum age of Sartoriana spinigera. However, the present findings allow setting a confident lower age constraint for the appearance of A. martensi to get a more accurate estimate for nucleic acid substitution rates. The age of fossil Acanthopotamon martensi based on the magnetostratigraphy of the Tatrot Formation is â¼2.6Â Ma (latest Pliocene).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeoworld - Volume 26, Issue 3, September 2017, Pages 566-571
Journal: Palaeoworld - Volume 26, Issue 3, September 2017, Pages 566-571
نویسندگان
Sebastian Klaus, Bahadur Singh, Lukas Hartmann, Kewal Krishan, Abhik Ghosh, Rajeev Patnaik,