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The Cisuralian tetrapod ichnoassociation from Italy: from historical findings to a standard reference status.
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Indizi di tettonica transtensiva tardotriassica in val Lumezzane (Brescia). Nota preliminare
No full textRevision of a classic site for the Permian tetrapod ichnology (Collio Formation, Trompia and Caffaro valleys, N. Italy), new evidences for a radiation of captorhinomorph footprints.
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Carta Geologica della Regione Lombardia (alla scala 1:10.000) - Sezione D5c3 - Lumezzane.
No full textRevision of a classic site for Permian tetrapod ichnology (Collio Formation, Trompia and Caffaro Valleys, N. Italy), new evidences for the radiation of captorhinomorph footprints
No full textThe recent studies on Permian captorhinomorph (non-diapsid eureptile) footprints from North America, North
Africa, and Europe raised the interest on their taxonomic and biostratigraphic significance. They seem to radiate
in the late Early Permian, but the scarcity of absolute dating in the classic sections bearing these trace fossils is not
helpful in order to unravel their distribution. The continental Collio Formation cropping out extensively in the
central Southern Alps of Italy can cover this gap of knowledge, since it preserves a rich testimony of these
trace fossils (Erpetopus, Hyloidichnus, Varanopus) and it is well-constrained from radiometric datings and fossil
content. For this and because of the huge amount of stored but unanalyzed material, a revision was necessary,
through careful taxonomic assignations. These taxa are here confirmed and/or identified as being: Amphisauropus
kablikae, cf. Batrachichnus isp., Dromopus lacertoides, Erpetopus cassinisi, Hyloidichnus bifurcatus, Limnopus
heterodactylus and Varanopus isp. The occurrence of Erpetopus at the base of the Collio Formation (Kungurian
base) suggests its minimum age of first appearance in a global context: this is a very important presence in
order to build a reliable tetrapod footprint biostratigraphy during the Permian. The quantity of material yielded
in the different facies of the Collio and Dosso dei Galli Formations also permit new insights on the
paleoenvironments and climatic settings
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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