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Fossil mayfly collections of the Museum fur Naturkunde, Humboldt University Berlin. I. Electroletus soldani gen. and sp. nov. (Ephemeroptera: Ameletidae) from the Eocene Baltic amber

100%

Godunko R. J., Neumann C.

Annales Zoologici

2006

tom 56

nr 1

Electroletus soldani gen. and sp. nov. from Eocene Baltic amber is described and illustrated. The presence of an elongate lateroparapsidal suture of the mesonotum, sublateroscutum and submedioscutum of the mesonotum with traces of the pigmented area, a backwards-stretched medially mesonotal suture, the dissimilar claws and a 5-segmented paracercus undoubtedly define the systematic position of Electroletus gen. nov. within the family Ameletidae McCafferty, 1991. The new genus differs from other genera of Ameletidae by combination of the following characters: pterostigmatic area of fore wings with 11-12 simple, not anastomosed veins; cubital field of fore wings with one pair of inter- calaries; tarsi of middle and hind legs are longer than tibiae; tarsal segment I of all legs is the longest; styliger plate with median protuberance. Type specimen belongs to W. Simon’s collection, which is hosted in the Museum für Naturkunde, Institute of Palaeontology, Humboldt University, Berlin.

Fossil mayfly collections of the Museum fur Naturkunde, Humboldt University, Berlin. II. Redescription of Baltameletus oligocaenicus Demoulin, 1968 with notes on Ameletidae McCafferty, 1991 [Insecta: Ephemeroptera] from the Eocene Baltic amber

100%

Godunko R. J., Neumann C., Krzeminski W.

Annales Zoologici

2008

tom 58

nr 1

The holotype of Baltameletus oligocaenicus Demoulin, 1968 preserved in Eocene Baltic amber and housed in the W. Simon amber collection at the Museum für Naturkunde, Humboldt University, Berlin is redescribed and illustrated. Baltameletus Demoulin, 1968 can be attributed to the family Ameletidae McCafferty, 1991 by a combination of following characteristics: (1) lateroparapsidal suture of mesothorax relatively elongate; (2) epimeron of mesothorax with membranous area between anepimeron and katepimeron; (3) mesonotal suture stretched backward medially and anterior paracoxal suture complete; (4) furcasternal protuberances contiguous; (5) hind wings well developed with RS, MA and MP triads; (6) tarsi 5-segmented with first tarsal segment fused with tibia; (7) forceps with two distal segments; (8) all tarsal claws dissimilar. This fossil genus clearly differs from all other representatives of the family Ameletidae by the following combination of characteristics: (1) unpaired projection of the vertex; (2) dorsally contiguous compound eyes (3); 2–3 mainly simple veins stretching from CuA to basitornal margin of forewing. Additionally, some data on the fossil representatives of Ameletidae are given.

Ograniczanie wyników

2 Annales Zoologici

2 Godunko R. J.

2 Neumann C.

1 Krzeminski W.

1 2008

1 2006

Wyniki wyszukiwania

Fossil mayfly collections of the Museum fur Naturkunde, Humboldt University Berlin. I. Electroletus soldani gen. and sp. nov. (Ephemeroptera: Ameletidae) from the Eocene Baltic amber

Fossil mayfly collections of the Museum fur Naturkunde, Humboldt University, Berlin. II. Redescription of Baltameletus oligocaenicus Demoulin, 1968 with notes on Ameletidae McCafferty, 1991 [Insecta: Ephemeroptera] from the Eocene Baltic amber