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Article: A Triassic mygalomorph spider from the northern Vosges, France

Publication: Palaeontology
Volume: 35
Part: 1
Publication Date: January 1992
Page(s): 211 235
Author(s): Paul A. Selden and Jean-Claude Gall
DOI:
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How to Cite

SELDEN, P. A., GALL, J. 1992. A Triassic mygalomorph spider from the northern Vosges, France. Palaeontology35, 1, 211–235.

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Abstract

The oldest fossil mygalomorph spider, from the Anisian Gres a Voltzia of the northern Vosges, France, is described as Rosamygale grauvogeli gen. et sp. nov. The spider exhibits mainly plesiomorphic characters. It is a tuberculote (sensu Raven 1985) and is placed in the Hexathelidae, with some reservations. A ground-dwelling spider, Rosamygale was an integral part of the halophilous terrestrial biota of the time. The spiders became entombed in the wet sediment of desiccating pools. The presence of a primitive tuberculote on the southern margins of the Zechstein Sea in the Middle Triassic is evidence for a pan-Pangaean distribution of the Mygalomorphae prior to the break-up of the supercontinent.La plus ancienne araignee mygalomorphe connue provient du Gres a Voltzia, d'age Anisien, du Nord des Vosges (France). Elle est decrite sous le nom Rosamygale grauvogeli gen. et sp. nov. Cette araignee presente essentiellement des caracteres plesiomorphes. Elle appartient aux formes 'tuberculote' (sensu Raven (1985)) et est rapportee avec reserve aux Hexathelidae. Rosamygale qui vivait au contact du sol, apartenait sans doute a la faune halophile de l'epoque. Les araignees s'echouaient dans des etendues d'eau en voie d'assechement et etaient enfouis dans le sediment argileux. L'existence d'une forme primitive de 'tuberculote' durant le Trias moyen, sur la marge meridionale de la mer du Zechstein, apporte la preuve d'une distribution pan-pangeenne des Mygalomorphae anterieurement a la dislocation du supercontinent.
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