The Ephemeridea (Insecta) from the Grès à Voltzia (early Middle Triassic) of the Vosges (NE France)

Research paper by Nina D. Sinitshenkova, Francine Marchal-Papier, Léa Grauvogel-Stamm, Jean-Claude Gall

Indexed on: 01 Sep '05Published on: 01 Sep '05Published in: Paläontologische Zeitschrift


The study of the Ephemeridea (385 specimens) of theGrauvogel andGall collection from the Grès à Voltzia (early Middle Triassic) of the Vosges, NE France, enabled the description of two new genera based on wings and six new genera based on nymphs. The new monotypic wing genera areToxodotes coloratus n. gen. n. sp. (Toxodotidae n. fam.) andTriassodotes vogesiacus n. gen. n. sp. (family MisthodotidaeSellards). The Misthodotidae, known until now only from the Permian, crossed the Permian/Triassic boundary and did not seem to have been affected by the end-Permian biotic crisis. Apart from the genera based on wings, six new monotypic genera are represented by nymphs only:Triassoephemera punctata n. gen. n. sp. (Triassoephemeridae n. fam.);Voltziaephemera fossoria n. gen. n. sp. (Voltziaephemeridae n. fam.), the most common species in the Grès à Voltzia;Triassomanthus parvulus n. gen. n. sp. (Triassomanthidae n. fam.);Triassonurus doliiformis n. gen. n. sp. (family SiphlonuridaeUlmer), now the oldest record of this family;Minorella virgata n. gen. n. sp. (family undetermined);Vogesonympha ludovici n. gen. n. sp. (Vogesonymphidae n. fam., Pterygota incertae sedis). Additionally,Mesoplectopteron longipes (Handlirsch) (family MesoplectopteridaeDemoulin) which was described earlier, is also present in theGrauvogel &Gall collection. The morphology of the Ephemeridea nymphs, at least for some of them, enables the interpretation of their probable habitats and life conditions, and thus contributes to our knowledge of the Grès à Voltzia palaeoenvironment.