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Dragonflies preserved in transparent gypsum crystals from the Messinian [Upper Miocene] of Alba, Northern Italy

100%

Schluter T., Kohring R., Gregor H. J.

Acta Zoologica Cracoviensia

2003

tom 46

nr Suppl.

From the Upper Miocene (Messinian) of the Alba area in Piedmont, northern Italy, are fossil dragonflies (mainly larvae) described, which were preserved in transparent gypsum crystals. The specimens belong probably to a single species (Oryctodiplax gypsorum), but occur in various pre-imaginal stages. This individual-rich but species-poor palaeoentomofauna appears to be almost autochthonous in origin and may have developed under hypersalinar conditions in a lagoonal environment during the Messinian salinar event.

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Description of a new stromateoid fish from the Miocene of St. Eugene, Algeria

80%

Carnevale G., Bannikov A. F.

Acta Palaeontologica Polonica

2006

tom 51

nr 3

A single specimen of the axial skeleton of an elongate fossil stromateoid fish, collected from the Upper Miocene (Messinian) St. Eugène locality of north−western Algeria, is identified as a new species Ariomma geslini sp. nov. of the family Ariommatidae. It is based on a unique combination of features, including morphology and arrangement of pleural ribs, structure and orientation of anterior portion of the anal fin, unique sequential arrangement of anal−fin pterygiophores in relation to the haemal spines, and presence of large cycloid scales and meristics. The morphology and orientation of the first anal−fin pterygiophore indicate that A. geslini sp. nov. is probably related to the amphi−Atlantic species A. bondi and A. melanum. The analysis of the fossil record of the Stromateoidei suggests that the ariommatids were already in existence at least as early as the Eocene.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Acta Zoologica Cracoviensia

1 Bannikov A. F.

1 Carnevale G.

1 Gregor H. J.

1 Kohring R.

1 Schluter T.

1 2006

1 2003

Wyniki wyszukiwania

Dragonflies preserved in transparent gypsum crystals from the Messinian [Upper Miocene] of Alba, Northern Italy

Description of a new stromateoid fish from the Miocene of St. Eugene, Algeria