Results 121 to 130 of about 1,250 (170)

How do the principal megabiases in the fossil record affect the discovery of past bryophyte diversity? [PDF]

Ann Bot
Blanco-Moreno C, Bippus AC, Tomescu AMF.
europepmc   +1 more source

The extinct Baltic amber genus Propelma Trjapitzin, a valid genus of Neanastatinae (Hymenoptera, Eupelmidae). [PDF]

Zookeys, 2013
Gibson GA.
europepmc   +1 more source

Discovery of Goethe's amber ant: its phylogenetic and evolutionary implications. [PDF]

Sci Rep
Boudinot BE, Bock BL, Tröger D, Weingardt M, Hammel JU, Grabe V, Solórzano-Kraemer MM, Jandausch K, Oberski JT, Schmuck T.   +9 more
europepmc   +1 more source

The First Record of Whitefly (Hemiptera, Sternorrhyncha, Aleyrodidae) from Bitterfeld Amber. [PDF]

Insects
Drohojowska J, Gorzelańczyk A, Tomanek N, Kalandyk-Kołodziejczyk M, Szwedo J.   +4 more
europepmc   +1 more source

Ultra-slow aging dynamics of glass and its application to geological dating. [PDF]

Nat Commun
Zhao Y, Zhang H, Xu L, Chen Z, Zhao R, Zhang B, Bai H, Wang WH.   +7 more
europepmc   +1 more source

First evidence of Limoniidae (Diptera: Nematocera) in French amber from Oise. [PDF]

Sci Rep
Kopeć K, Krzemiński W, Kania-Kłosok I, Syratt M, Nel A, Soszyńska A.   +5 more
europepmc   +1 more source

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Studies on the allergenicity of Baltic amber

Contact Dermatitis, 1992
Baltic amber is a fossil resin deposited 36‐7 million years ago and one source may be the extinct tree (Pinus) succinifer. Palaeobotanical studies of amber have an extensive literature, but the aspect of allergenicity has not been addressed before.
A T, Karlberg, A, Boman, C, Lidén
openaire   +2 more sources

Correlations between baltic amber and Pinus resins

Phytochemistry, 1985
Abstract The composition of the acid fractions of four pine resins has been studied before and after an ‘ageing’ process. Correlations are established between Baltic amber and ‘aged’ Pinus halepensis resin.
Roberto Samperi
exaly   +2 more sources

Poisonous setae on a Baltic amber caterpillar

Arthropod Structure & Development, 2019
The knobbed setae on a small caterpillar in 45-55 million years old [Eocene] Baltic amber were studied and characterized as urticating, with evidence of liquid release implying the production of poisons. It is presumed that the caterpillar had been disturbed just prior to falling into the resin, as some of its setae showed defensive responses.
George, Poinar, Fernando E, Vega
openaire   +2 more sources

The chemical composition of Baltic amber

Chemical Geology, 1984
Abstract The ether-soluble fraction of Baltic amber (Succinite) has been analyzed by capillary gas chromatography—mass spectrometry, and many diterpenoids of the abietane, pimarane and labdane series identified. Also found was a pattern of monoterpenoids similar to that encountered in fossil kauri resin, sesquiterpenoids and many other compounds ...
John S. Mills, Raymond White, Laurence J. Gough   +2 more
openaire   +1 more source