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始新世中期高纬度地区的海绵属：环境与进化意义

The sponge genus from the high-latitude middle Eocene: environmental and evolutionary significance.

作者信息

Pisera Andrzej, Manconi Renata, Siver Peter A, Wolfe Alexander P

机构信息

Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, 00-818 Warsaw, Poland.

Dipartimento di Scienze della Natura e del Territorio (DIPNET), Università di Sassari, 07100 Sassari, Italy.

出版信息

Palaontol Z. 2016;90(4):673-680. doi: 10.1007/s12542-016-0328-2. Epub 2016 Sep 28.

DOI:10.1007/s12542-016-0328-2
PMID:28615751
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5445566/
Abstract

The freshwater sponge species cf. Weltner, 1895 (Spongillida, Spongillidae) is reported for the first time as a fossil from middle Eocene lake sediments of the Giraffe kimberlite maar in northern Canada. The sponge is represented by birotule gemmuloscleres as well as oxea megascleres. Today, inhabits warm-water bodies, so its presence in the Giraffe locality provides evidence of a warm climate at high latitudes during the middle Eocene. The morphological similarity of the birotules to modern conspecific forms suggests protracted morphological stasis, comparable to that reported for other siliceous microfossils from the same locality.

摘要

淡水海绵物种cf. Weltner，1895年（海绵纲，海绵科）首次作为化石在加拿大北部长颈鹿金伯利岩火山口的始新世中期湖泊沉积物中被发现。该海绵以双轮骨针状小骨片和斧状大骨针为代表。如今，它栖息在温暖水体中，因此其在长颈鹿地区的出现为始新世中期高纬度地区温暖气候提供了证据。双轮骨针与现代同种形态的形态相似性表明其形态长期保持稳定，这与同一地区其他硅质微化石的情况类似。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/0df9ea7760de/12542_2016_328_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/949d72766996/12542_2016_328_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/ba2fff3b668e/12542_2016_328_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/d630c34c33cf/12542_2016_328_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/0df9ea7760de/12542_2016_328_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/949d72766996/12542_2016_328_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/ba2fff3b668e/12542_2016_328_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/d630c34c33cf/12542_2016_328_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/05f5/5445566/0df9ea7760de/12542_2016_328_Fig4_HTML.jpg

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