Journal article
Evidence for insect and annelid activity across the Triassic-Jurassic transition of east Greenland
M Steinthorsdottir, AMP Tosolini, JC McElwain
Palaios | SEPM-SOC SEDIMENTARY GEOLOGY | Published : 2015
Abstract
During a study of macroflora from the AstarteklOft locality in Jameson Land, East Greenland, endophytic insect ovipositions (egg traces) belonging to ichnogenus Paleoovoidus were recorded for the first time in ginkgoalean (Ginkgoites, Sphenobaiera, and Baiera) fossil leaves across the Triassic-Jurassic (Tr-J) transition (ca. 200 Ma). The ovipositions may have been produced by insects in the order Odonata (dragonflies and damselflies) and are relatively more abundant before than after the Tr-J transition, possibly reflecting changes in plant-insect association. Fossil clitellate annelid (leech) cocoons were also discovered in a macerated sample from a single bed within the Tr-J transition. Th..
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Awarded by Stockholm University
Awarded by ERC
Awarded by SFI
Awarded by Marie Curie Excellence Grant
Funding Acknowledgements
MS is grateful for postdoctoral research funding provided by Stockholm University (SU 619-2974-12 NAT). JCM acknowledges funding from ERC (2011-StG 279962-OXYEVOL) and SFI (11/PI/1103). MS and JCM acknowledge a Marie Curie Excellence Grant (MEXT CT-2006-042531). Two anonymous reviewers and the editors provided valuable feedback on the manuscript. M. O'Sullivan measured dimensions of ovipositions in bed 2. A. Jeram is thanked for helpful criticism and suggestions.