Revision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of Siphloplecton Clemens, 1915, with notes on the new S. jaegeri species group and with key to fossil male adults of Siphloplecton

• Published in: ZooKeys Vol. 898; no. 1; pp. 1 - 26
• Main Authors: Godunko, Roman J, Neumann, Christian, Staniczek, Arnold H
• Format: Journal Article
• Language: English
• Published: Bulgaria Pensoft Publishers 10-12-2019
• Subjects: Biogeography; Cenozoic; Discovery and exploration; Ephemeroptera; Europe; Faunistics & Distribution; Fossils; Identification and classification; Identification key; Insecta; Insects; Mayflies; Metropodidae; Palaeontology; Taxonomy; Baltic Sea; new species; Eocene; mayflies; Siphlonuroidea; species group; Fossil insects
• ISSN: 1313-2989; 1313-2970
• DOI: 10.3897/zookeys.898.47118

The
species group is established here for three extinct species, namely for the earlier described
Demoulin, 1968, and for two new species from Eocene Baltic amber,
and
Based on the well-preserved specimens of these species, a diagnosis is provided for the newly established species group. Representatives of the
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 cleft apically. Further new specimens of the
species group are documented that cannot be attributed to species level due to their poor preservation. Finally, a key to male adults of fossil species of
is given.