Figura 4 - uploaded by Jenaro L. García-Alcalde
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Ciclo típico (alrededor de 2,5 m de potencia total) en el miembro medio de la Fm. Moniello, en la ensenada de Moniello.
Source publication
Resumen: Se analizan las principales características de las Formaciones Moniello-Santa Lucía, de edad Emsiense más alto-Eifeliense basal en el Dominio Astur-Leonés de la Cordillera Cantábrica, en el área de máximo desarrollo arrecifal. Una parte, al menos, de la sucesión de la Fm. Moniello en su localidad-tipo registra repetidas oscilaciones transg...
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Le nucinulide Palinulus armoricanus nov. sp. (brachiopode rhynchonellide) est abondant au sein du membre inférieur de la Formation des Marettes qui était autrefois exposée au sein d’une tranchée temporaire à La Lézais (Gahard), au nord de Rennes dans le Synclinorium du Ménez Bélair (Massif Armoricain). Les conodontes, brachiopodes et autres faunes...
Citations
... The Ferronirhynchia pulgari stratotype as well as the immediately under-and overlying beds (Fig. 3), was deposited during one of the small transgressiveregressive cycles first mentioned in Méndez-Bedia (1976) and Arbizu et al. (1979) and described in detail by García-Alcalde (2015). They occur in the lower and middle members of the Moniello Formation, particularly during the cycle stage c (García-Alcalde, 2015, p. 46) characterized by packstones-wackestones and interbedded shale layers. ...
... 3), is a gray argillaceous, partially dolomitized, limestone bed that occurs in the Lower Member of the formation. The age of the stratotype, according both the fauna(Méndez-Bedia, 1976) and the stratigraphic correlation with the Moniello cove succession, would correspond to the final part of the serotinus conodont Zone (García-López inGarcía- López & Bastida, 2002;García-Alcalde, 2015). ...
The taxonomic status of the subfamily Trigonirhynchiinae is discussed based on the morphological features, together with the geographic and the stratigraphic distribution of the type genus Trigonirhynchia Cooper. The new genus, Ferronirhynchia n. gen., including the type species F. pulgari n. sp., is proposed. The new taxon, close to Trigonirhynchia, occurs in upper Emsian beds of the Moniello Formation, in Asturias, serotinus/patulus conodont zones, Faunal Intervals 14 to 16a. The ontogeny and palaeoecology of F. pulgari are analyzed. Growth of the new species is bicyclic. Juvenile forms are low and biconvex displaying sharp commissures. Adult forms are high, dorsi-biconvex, geniculate, with abrupt anterior and lateral margins. Ferronirhynchia pulgari is an opportunistic species, often found in paraautochtonous rhynchonellid assemblages that occur in quiet and muddy deposits formed below the wave-base level near or in reefal environments in the Cantabrian platfom. Shells of the new species supported a variety of small epizoans, commensalists or mutualists, mostly reticulate bryozoans, serpulid and other tubeworms, and auloporids. This life habit favoured the epizoans to escape from burial in muddy bottoms.
... Godefroid (1965) and García-Alcalde in Arbizu et al. (1979) considered the German species Rhynchonella amanshauseri Dahmer, 1923 as a synonym of Béclard's species, but this opinion was not accepted by Brice (1981), who was not convinced that the latter belongs to Tetratomia. The species parvula was listed on many occasions in the Emsian of the Cantabrian Mountains (Spain), notably by García-Alcalde (2015). However, Tetratomia? parvula urgently needs to be revised (internal features unknown, except the presence of a long dorsal septum illustrated by Godefroid (1965, fig. ...
The type material of 45 Pridolian–Devonian brachiopod species, described in southern Belgium and northern France (1870–1945) and curated at the Royal Belgian Institute of Natural Sciences (Brussels), is re-investigated and illustrated in order to facilitate future taxonomic revision; such a catalogue should allow a better assessment of the brachiopod diversity during the considered time span. Furthermore, 28 other Silurian–Devonian species originally described in Belgium (1850–1950), but housed in other Belgian or foreign institutions, are also discussed. For taxonomical purposes, the lectotypes of several species are selected; the latter were described by Asselberghs (Stropheodonta couviniensis, Plethorhyncha percostata var. gdoumontensis, Athyris dorlodoti, Retzia gdoumontensis, Dielasma maillieuxi), Béclard (Orthis dorsoplicata, Orthis musischura, Rhynchonella parvula (non R. parvula Eudes-Deslongchamps)), de Ryckholt (Lingula amayana), Dewalque (Crania corneti), and Maillieux (Discina (Discina) forrierensis, Pholidostrophia extensa, Anoplia theorassensis, Schuchertella durbutensis, Streptorhynchus rahiri, Pentamerus loei). Re-investigation of the ambocoeliid Spirifer pentameroides Stainier highlighted the homonymy between Diazoma Dürkoop, 1970 (Brachiopoda) and Diazoma Lamarck, 1816 (Tunicata); the former genus must be rejected and replaced by a valid synonym, namely Kelusia Mamedov, 1978.
Abstract
A new rich and diversified ostracode fauna from the Torkoz area (section Hassi Mouf South, Moroccan Anti-Atlas) is described and the ostracode distribution near the Early/Middle Devonian boundary is discussed. This ostracode fauna of a single limestone bed yields 32 taxa and is compared with the less-diversified ostracode fauna from an adjacent parallel section Hassi Mouf South as well as with a published conodont-bearing sample from section Torkoz. All three ostracode faunas are closely related, and therefore, the same latest Emsian age is postulated. Palynomorphs (acritarchs and prasinophytes) from section Torkoz support this late Early Devonian age and the scarce brachiopod fauna of the equivalent level from section Hassi Mouf South suggests a stratigraphical position very close to the Emsian/Eifelian boundary, probably latest Emsian.
Zygobeyrichia subcylindrica from a thin marly bed embedded in shales, slightly below the ostracode-rich sample from section Hassi Mouf South, and the conodonts of the patulus Zone from section Torkoz, favours the position of the Early/Middle Devonian boundary within the Yeraifia Formation and not in or on top of the Rich 4 Sandstone in the SW Dra Valley area as hitherto published. The latest Early Devonian ostracode faunas from the Torkoz area belong to the shallow-water Eifelian Ecotype of G. Becker.
The new genus Karlingrella for Euglyphella? granulosa Blumenstengel, 1962 and the new species Quasillites (Beckjennites) gebeckeri are erected.
A new rich and diversified ostracode fauna from the Torkoz area (section Hassi Mouf South, Moroccan Anti-Atlas) is described and the ostracode distribution near the Early/Middle Devonian boundary is discussed. This ostracode fauna of a single limestone bed yields 32 taxa and is compared with the less-diversified ostracode fauna from an adjacent parallel section Hassi Mouf South as well as with a published conodont-bearing sample from section Torkoz. All three ostracode faunas are closely related, and therefore, the same latest Emsian age is postulated. Palynomorphs (acritarchs and prasinophytes) from section Torkoz support this late Early Devonian age and the scarce brachiopod fauna of the equivalent level from section Hassi Mouf South suggests a stratigraphical position very close to the Emsian/Eifelian boundary, probably latest Emsian. Zygobeyrichia subcylindrica from a thin marly bed embedded in shales, slightly below the ostracode-rich sample from section Hassi Mouf South, and the conodonts of the patulus Zone from section Torkoz, favours the position of the Early/Middle Devonian boundary within the Yeraifia Formation and not in or on top of the Rich 4 Sandstone in the SW Dra Valley area as hitherto published. The latest Early Devonian ostracode faunas from the Torkoz area belong to the shallow-water Eifelian Ecotype of G. Becker. The new genus Karlingrella for Euglyphella ? granulosa Blumenstengel, 1962 and the new species Quasillites ( Beckjennites ) gebeckeri are erected.
The brachiopod fauna of the Chalonnes Limestone (Armorican Massif, France) is famous because of the presence of large, thick-shelled species first described by Oehlert (1881). One of these species originally assigned to Pentamerus davyi Oehlert, 1881 is here revised. External as well as internal characters of the shell allow its attribution to Zdimir robustus (Barrande, 1879), a species from the Trebotov Limestone in the Prague area. This reassignment is consistent with an Upper Emsian age for the Chalonnes Limestone.
