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Helmut Keupp
3 articles by this author
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Research Article
Late Jurassic (Upper Kimmeridgian) Heterobranchia (Gastropoda) of the coral-facies of Saal near Kelheim and the viciniy of Nattheim (Germany)
Joachim Gründel, Helmut Keupp, Fritz Lang,     Alexander Nützel
10.3897/zitteliana.96.e84187
 12-12-2022
 Unique: 1198 | Total: 2221  | Access Period:
 Reprint: € 15,90
 179-221
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Research Article
A possible terrestrial egg cluster in driftwood from the Lower Jurassic (Late Pliensbachian) of Buttenheim (Franconia, Germany)
    Franz-Josef Scharfenberg,     Helmut Keupp,     Johann Schobert
10.3897/zitteliana.96.84493
 27-06-2022
 Unique: 839 | Total: 1982  | Access Period:
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 135-143
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Research Article
Early teleost otolith morphogenesis observed in the Jurassic of Franconia, Bavaria, southern Germany
Werner Schwarzhans, Helmut Keupp
10.3897/zitteliana.96.81737
 12-04-2022
 Unique: 927 | Total: 2247  | Access Period:
 Reprint: € 8,70
 51-67
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