biostudies-literatureUnknown898Godunko RJAlexander von Humboldt-StiftungThe <i>Siphloplecton jaegeri</i> species group is established here for three extinct species, namely for the earlier described <i>Siphloplecton jaegeri</i> Demoulin, 1968, and for two new species from Eocene Baltic amber, <i>Siphloplecton landolti</i> <b>sp. nov.</b> and <i>Siphloplecton studemannae</i> <b>sp. nov.</b> Based on the well-preserved specimens of these species, a diagnosis is provided for the newly established species group. Representatives of the <i>S. jaegeri</i> species group are characterized by the presence of large, medially contiguous eyes, stout pointed setae along the outer margin of the foretibia, three intercalaries in the cubital field of the forewing, and elongated penis lobes, which are apically triangular or rounded, medially contiguous, and with a V-shaped clefZooKeys1-26https://www.ebi.ac.uk/biostudies/studies/S-EPMC6917629biostudies-literatureRevision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of <i>Siphloplecton</i> Clemens, 1915, with notes on the new <i>S. jaegeri</i> species group and with key to fossil male adults of <i>Siphloplecton</i>.PMC6917629Neumann CStaniczek AHGodunko RJfalseRevision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of <i>Siphloplecton</i> Clemens, 1915, with notes on the new <i>S. jaegeri</i> species group and with key to fossil male adults of <i>Siphloplecton</i>.The <i>Siphloplecton jaegeri</i> species group is established here for three extinct species, namely for the earlier described <i>Siphloplecton jaegeri</i> Demoulin, 1968, and for two new species from Eocene Baltic amber, <i>Siphloplecton landolti</i> <b>sp. nov.</b> and <i>Siphloplecton studemannae</i> <b>sp. nov.</b> Based on the well-preserved specimens of these species, a diagnosis is provided for the newly established species group. Representatives of the <i>S. jaegeri</i> species group are characterized by the presence of large, medially contiguous eyes, stout pointed setae along the outer margin of the foretibia, three intercalaries in the cubital field of the forewing, and elongated penis lobes, which are apically triangular or rounded, medially contiguous, and with a V-shaped clef2019-01-01T00:00:00Z20192025-04-18T17:53:21.193Z2020-05-21T23:52:29ZS-EPMC69176293186673210.3897/zookeys.898.47118