Every cloud has a silver lining: X-ray micro-CT reveals Orsunius rove beetle in Rovno amber from a specimen inaccessible to light microscopy
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Every cloud has a silver lining : X-ray micro-CT reveals Orsunius rove beetle in Rovno amber from a specimen inaccessible to light microscopy. / Kypke, Janina L.; Solodovnikov, Alexey.
I: Historical Biology, Bind 32, Nr. 7, 2020, s. 940-950.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Every cloud has a silver lining
T2 - X-ray micro-CT reveals Orsunius rove beetle in Rovno amber from a specimen inaccessible to light microscopy
AU - Kypke, Janina L.
AU - Solodovnikov, Alexey
PY - 2020
Y1 - 2020
N2 - The exceptionally well-preserved and diverse insect fossil record of the Baltic amber group is a unique source for science. However, bubbles and thick layers of white gaseous froth cover numerous inclusions in this type of amber, rendering their examination with traditional light microscopy impossible. Here, we show that X-ray micro-computed tomography can be an efficient tool in such cases. We scanned a completely covered rove beetle (Staphylinidae) fossil in a piece of the relatively recently discovered Rovno amber. The resulting reconstruction was detailed enough to identify the fossil as the first extinct species of Orsunius Assing, an extant genus from the systematically very challenging subtribe Medonina (Lathrobiini, Paederinae). We summarize all previous studies on the origin of gaseous inclusions around fossil specimens in Baltic amber and discuss the technical challenges of using µ-CT where a mostly hollow specimen is surrounded by bubbles of the same density. Since recent Orsunius exclusively occur in the Oriental biogeographic region, we discuss the possible climate change driven speciation scenarios between Orsunius electronefelus sp. nov. and the former. urn:lsid:zoobank.org:pub:8ECD641E-629F-46DC-BC81-217C529ACA84.
AB - The exceptionally well-preserved and diverse insect fossil record of the Baltic amber group is a unique source for science. However, bubbles and thick layers of white gaseous froth cover numerous inclusions in this type of amber, rendering their examination with traditional light microscopy impossible. Here, we show that X-ray micro-computed tomography can be an efficient tool in such cases. We scanned a completely covered rove beetle (Staphylinidae) fossil in a piece of the relatively recently discovered Rovno amber. The resulting reconstruction was detailed enough to identify the fossil as the first extinct species of Orsunius Assing, an extant genus from the systematically very challenging subtribe Medonina (Lathrobiini, Paederinae). We summarize all previous studies on the origin of gaseous inclusions around fossil specimens in Baltic amber and discuss the technical challenges of using µ-CT where a mostly hollow specimen is surrounded by bubbles of the same density. Since recent Orsunius exclusively occur in the Oriental biogeographic region, we discuss the possible climate change driven speciation scenarios between Orsunius electronefelus sp. nov. and the former. urn:lsid:zoobank.org:pub:8ECD641E-629F-46DC-BC81-217C529ACA84.
KW - Medonina
KW - Orsunius
KW - Paederinae
KW - Rovno amber
KW - Staphylinidae
KW - X-ray micro-CT
U2 - 10.1080/08912963.2018.1558222
DO - 10.1080/08912963.2018.1558222
M3 - Journal article
AN - SCOPUS:85059000927
VL - 32
SP - 940
EP - 950
JO - Historical Biology
JF - Historical Biology
SN - 0891-2963
IS - 7
ER -
ID: 221671556