Lower Ordovician (Tremadocian) Lingulate Brachiopods From the House and Fillmore Formations, Ibex Area, Western Utah, Usa

Lingulate brachiopods from the Acanthopyge Limestone (Eifelian) of the Barrandian, Czech Republic

“…3C, Q). It is similar to the pitting described in Wahwahlingula antiquissima (Jeremejew, 1856) by Cusack et al (1999) and Popov et al (2002), and in W. sevierensis Holmer et al 2005 by the authors. The size of the pits in Kosagitella is 2-3 μm.…”

“…The size of the pits in Kosagitella is 2-3 μm. Holmer et al (2005) suggested that pits of this size might be interpreted as imprints of proteinaceous vesicles (Williams 2003). Pitting of a different type has been observed in Obolus eichwaldi by Cusack et al (1999).…”

Depth related brachiopod faunas from the lower Cambrian Forteau Formation of southern Labrador and western Newfoundland, Canada

“…Although the present study does not yield any specific evidence as to the preferred substrate of any of the recovered brachiopod species, comparison to presumably closely related species from lagerstätten suggest that the paterinids Paterina and Micromitra attached directly to other organisms such as sponges or other types of hard substrates such as brachiopod shells or trilobite sclerites (Topper et al, 2015). The acrotretids Hadrotreta and Acrothyra may have been associated with algal fronds, like Kuangshanotreta from the Chenjiang lagerstätte (Wang et al, 2012) or hexactinellid sponges like some Ordovician taxa (Mergl, 2002;Holmer et al, 2005). Lingulids similar to Eoobolus, Kyrshabaktella and Pustulobolus from Cambrian lagerstätten typically have long, flexible pedicles which have been interpreted to have held the shells 'kite-like' above the sediment surface with only the distal part of the pedicle embedded in the sediment (Zhang et al, 2008).…”

Proposed stratotype for the base of the Lawsonian Stage (Cambrian Stage 10) at the First Appearance Datum of Eoconodontus notchpeakensis (Miller) in the House Range, Utah, USA

“…Trilobites are common and include some silicified faunas; conodont samples have yielded common organophosphatic brachiopods, and calcitic brachiopods are rare. Vendrasco & Runnegar (2004) , Holmer et al 2005, and calcitic brachiopods (Hintze et al 1988. Biostratigraphically diagnostic conodonts are abundant and can be obtained from virtually any bed, including stromatolitic reefs.…”