Sydney Mohr's research while affiliated with University of Alberta and other places

Publications (4)

Article
Full-text available
The Cretaceous birds of Alberta are poorly known, as skeletal elements are rare and typically consist of fragmentary postcranial remains. A partial avian coracoid from the upper Campanian Dinosaur Park Formation of Alberta, Canada can be referred to the Ornithurae, and is referred to here as Ornithurine G (cf. Cimolopteryx). Its structure is simila...
Article
Full-text available
Durophagous mosasaurs are rare members of Late Cretaceous marine faunal assemblages and new fossil discoveries can shed light on their anatomy, functional morphology and evolutionary history. Here we describe a new species in the durophagous genus Globidens from the Maastrichtian phosphate deposits of Morocco, based on a partial disarticulated skul...

Citations

... Total Cretaceous ornithurines such as Iaceornis or Cimolopteryx-like taxa known mostly from coracoids (Hope, Chiappe & Witmer, 2002;Agnolin, 2010;Longrich, Tokaryk & Field, 2011;Mohr et al., 2021), in which the glenoid is situated cranial to the scapular cotyle, a condition shared with most crown-group birds. ...
... Upper Couche III has an exceptionally rich vertebrate fauna. It comprises sharks (Arambourg, 1952;Cappetta et al., 2014), fish (Arambourg, 1952;Vullo et al., 2017), mosasaurid (Bardet et al., 2005a;Bardet et al., 2005b;Bardet et al., 2008;Bardet et al., 2010;Bardet et al., 2017) Bardet et al., 2005b;Schulp et al., 2009;LeBlanc et al., 2012) Longrich et al., 2021)\(LeBlanc et al., 2019Strong et al., 2020) and pachyvaranid (Houssaye et al., 2011) squamates, elasmosaurid plesiosaurs (Vincent et al., 2011;Vincent et al., 2013), marine turtles Lapparent de Broin et al., 2013), and rarely crocodilians (Jouve et al., 2008). Pterosaurs are diverse and abundant Longrich et al., 2018), and rare dinosaurs are also present Longrich et al., 2017;Longrich et al., 2020). ...
... This margin is almost vertical in the Burkhant azhdarchid (Watabe et al. 2009) and Quetzalcoatlus (Andres and Langston 2021). It is inclined posteriorly in Ornithocheirus (Owen 1861), Anhanguera (Wellnhofer 1991b;Kellner and Tomida 2000), Pteranodon (Eaton 1910;Bennett 2001;Martin-Silverstone et al. 2017), Hongshanopterus (Wang et al. 2008), Tapejara (Eck et al. 2011), Kariridraco (Cerqueira et al. 2021), and Azhdarcho (Averianov 2010). Thus, the condition of ZIN PH 77/43 with anteriorly inclined anterior margin of the neural spine of the atlantoaxis appears to be unique among the considered pterodactyloids. ...