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	Provedor de dados Naturalis (3) Autor El-Khayal, A.A. (3) Palavra-chave 38.22 (2) 38.21 (1) Tipo do documento Article / Letter to the editor (3) Ano 1985 (3) País Netherlands (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Hanadirella: A new problematic arthropod(?) from the Lower Ordovician (Llanvirn) Tabuk Formation, central Saudi Arabia Naturalis El-Khayal, A.A.. The new genus Hanadirella - with the type species H. bramkampi - from the Lower Ordovician (Llanvirn) of central Saudi Arabia represents a segmented organism which appears to have an arthropod affinity. The problematic genus is oval hat-shaped, less than 1 mm in diameter. Its affinity and palaeoecology are discussed. Tipo: Article / Letter to the editor Palavras-chave: 38.22. Ano: 1985 URL: http://www.repository.naturalis.nl/record/317413 Occurrence of a characteristic Wealden fern (Weichselia reticulata) in the Wasia Formation, central Saudi Arabia Naturalis El-Khayal, A.A.. More than fifty fragments of vegetative pinnae and pinnules of Weichselia reticulata are reported from a clay quarry in the Wasia Formation (Cenomamian and Turonian? age). Tipo: Article / Letter to the editor Palavras-chave: 38.21. Ano: 1985 URL: http://www.repository.naturalis.nl/record/317478 Some Silurian (Llandovery) monograptids from Saudi Arabia Naturalis El-Khayal, A.A.. Three species of Monograptus are recognized from Qusayba, Al-Qasim Province, Saudi Arabia. The Qusayba Shales Member of the Tabuk Formation in central Saudi Arabia contains M. decipiens decipiens, M. ex gr. barrandei and M. elongatus, associated with other graptolites. This assemblage is indicative of the Monograptus convolutus Zone. Therefore the lower part of the Qusayba Shales are believed to be correlative to the convolutus Zone (Llandovery) of Great Britain. Tipo: Article / Letter to the editor Palavras-chave: 38.22. Ano: 1985 URL: http://www.repository.naturalis.nl/record/317540 Registros recuperados: 3 Primeira ... 1 ... Última

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