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Further Archaeogastropoda from the Campanian of Torallola, northern Spain

Kiel S., Bandel K.

Acta Geologica Polonica

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2002

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Vol. 52, nr 2

239-249

EN

18 archaeogastropod species are described from the Campanian of Torallola in north-eastern Spain, including 13 new species and one new genus. They are assigned to the Liotiinae, Colloniinae, Turbininae, Skeneidae and Cirridae. Our species of the Liotiinae are comparable with Recent as well as Triassic liotiids, the documented colloniids show close relations to moder species. Certain members of the Angaria-Astraea-Turbo-relation are difficult if not impossible to distinguish on shell characters alone, although these shells can be traced back into the Triassic. Three skeneiform species are assigned to Recent Skenea, but neither fossil nor recent Skoneidae are sufficiently well known, so our treatment remains preliminary. The new genus Torallochus is introduced for species having initially planispiral coiling that later changes to turriform coiling, and which are sculptured with strong ribs or spines on the periphery. The systematic position of this genus within the Trochidea remains uncertain. Among the Cirridae, the genusShikamancirrus in synonymized with the older name Sensuitrochus, and the youngest member of this genus is described. The new species are Pseudoliotina stinnesbecki, Arene mcleani, Homalopoma schroederi, Astraea iredalei,Astraea batalleria, Astraea hickmanae, Astraea? sohli, Skenea Wareni, Skenea suturata, Skenea torallensis, Torallochus rempensis, Torallochus pupiformis, and Torallochus discus.

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Trochidae (Archaeogastropoda) from the Campanian of Torallola in northern Spain

Kiel S., Bandel K.

Acta Geologica Polonica

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2001

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Vol. 51, nr 2

137-154

EN

30 species of the archaeogastropod family Trochidae are described from the Campanian of the southern Pyrenees, 15 of them are new. The new genus Amphigibbula is introduced and the genus Chilodontoidea is renamed as Hudledonta. Apparently several trochid lineages with living species can be traced back into the Late Cretaceous. This regards the Eucyclinae, Margaritinae, and Solariellinae, and the Tegulinae with some reservations. Among the groups examined here, only the members of the Trochinae appear to be of rather different character than their modern representatives. The fossil record of the Umboniinae can go far beyond that of the Late Cretaceous and connect even to Palaeozoic genera. The 15 new species are: Eucyclomphalus reminiscencius, Calliotropis torallolensis, Calliotropis seguris, Ilerdus pyrenaeus, Eucycloscala cretacea, Hudledonta nicolae, Danilia kosslerae, Margarites kasei, Margarites nielseni, Margarites kowalkei, Tectus quinteroi, Thoristella marshalli, Suavotrochus ponsi, Ethalia vinxae, and Protorotella herberti.

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Upper Cretaceous of the Barranca (Navarra, northern Spain); integrated litho-, bio- and event stratigraphy.Part 2, Campanian and Maastrichtian

Kuchler T.

Acta Geologica Polonica

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2000

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Vol. 50, no. 4

441-499

EN

Campanian to Lower Maastrichtian strata of the eastern Barranca (Navarra, northern Spain), based on 11 exposures near Irurzun, were investigated in detail and correlated with coeval strata of the western Barranca and the Oroz-Betelu Massif (Navarra). The Sarasate Formation exposed in the Barranca in divided into ten members. Deposition was influenced by uplift of the Anoz-Ollo salt structure during the latest Santonian and Early Campanian. The Campanian-Maastrichtian of Navarra is characterised by thick and relatively complete successions containing biostratigraphically significant fossil groups (ammonites, inoceramids, echinoids). Detailed bed-by-bed collecting has enabled the establishment of an integrated zonal scheme with potential for interbasinal correlation. In addition to local peak, partial range and assemblage zones, based on echinoids and ammonite-echinoid assemblages, an ammonite zonation, based on an unnamed interval and the following 10 partial range (PRZ) and assemblage zones (AZ) of Scaphites hippocrepis III, S. hippocrepis III/Menabites spp., Hoplitoplacenticeras marroti, Trachyscaphites spiniger, Pseudoxybeloceras phaleratum, Nostoceras (Bostrychoceras) polyplocum, Trachyscaphites pulcherrimus, N. (didymoceras) archiacianum, N. (Nostoceras) hyatti and Pachydiscus neubergicus/Pachydiscus epiplectus, is presented. The ammonite zonation markedly refines both the existing regional and the so-called European standard zonal schemes. Correlation with other Spanish areas (Cantabria, Burgos and Guipuzcoa), the Aquitaine (France), Westphalia and Lower Saxony (Germany) and the Vistula valley (Poland) is discussed. Twelve of the recognised bio-events, characterised by mass-occurrences of irregular echinoids and of monospecific, or taxonomically more variable, mostly heteromorph ammonite assemblages, are significant for regional correlation. Three Offaster maxima are of interbasinal importance as they can be correlated to Germany, Great Britain and Northern Ireland. The origin of these bio-events is closely related to the transgressive and regressive pulses recognised in Navarra, of which the pomeli Transgression I and the hippocrepis, subglobosa and polyplocum regressions are the most pronounced. The tectonic phase at the Santonian/Campanian boundary is related to the Wernigerode Phase. The onset of the second phase is placed in the lower Upper Campanian marotti Zone, the onset of a third phase (UCTE) in theUpper Campanian polyplocum Zone.