... to Aulacopleuridae on the basis of its micropygous morphology, but it shares potential apomorphies with Brachymetopidae and could prove to be the most plesiomorphic representative of that family. The Upper Ordovician stratigraphy of the Shenandoah Valley was studied by Cooper and Cooper (1946) , who named...

... resembles members of the Aulacopleuridae, it is considered to be a Silurian representative of the predominantly Ordovician family Rorringtoniidae. Its implications for rorringtoniid classification are discussed, and the classification of aulacopleuroidean trilobites is briefly reviewed. Le trilobite...

..., Odontopleuridae, Phacopidae, Dalmanitidae, Calymenidae, Cheiruridae, Encrinuridae, Proetidae, Aulacopleuridae, and Harpetidae. These families are represented by 52 named species (32 new), with a further 8 forms described under open nomenclature, belonging to 30 genera (1 new). Plate 85 is devoted to late...

... niche as an opportunistic species that flourished in conditions of reduced oxygen availability, and this issue will be considered in another work. Order Aulacopleurida Adrain, 2011 Compared to the subfamily Otarioninae, the primary paired tubercles of Aulacopleurinae are subdued...

... and Fortey, 2009 ; Zhou et al., 2016 ). Scharyiinae has been considered a subfamily of Aulacopleuridae Angelin, 1854 (e.g., Thomas and Owens, 1978 ; Fortey, 1980 ) or of Brachymetopidae (e.g., Owens in Owens and Hammann, 1990 ). Following Adrain and Kloc ( 1997 ), it has generally been recognized...

... individuals by Styginidae (Corynexochyda), Lichidae and Odontopleuridae (Lichida), Phacopidae and Acastidae (Phacopida), and Proetidae and Aulacopleuridae (Proetida). Trilobite paleobiodiversity evolution at a global scale (fig. 2A ) and at the regional scale of the Ardennes Massif (figs. 2B–C...

... Calymenina Order Proetida Order Aulacopleurida Order Asaphida Order Olenida Order Harpida [Order Uncertain (58 families)] ...

... [ Adrain and Westrop, 2000 ; Alroy et al ., 2001 ]. In the Ardennes Massif, trilobites are mainly represented by nine families: Styginidae (Corynexochida), Lichidae and Odontopleuridae (Lichida), Homalonotidae, Phacopidae and Acastidae (Phacopida), Proetidae, Tropidocoryphidae and Aulacopleuridae...

... for a phylogenetic analysis of Cyphaspides is currently limited by problems with outgroup choice and character polarity. Cyphaspides is distinct enough morphologically from other members of the Aulacopleuridae to be placed in its own subfamily; the only taxon regarded as similar enough to Cyphaspides...

...) or their institution(s). Permission for reuse (free in most cases) can be obtained from RightsLink . Paper handled by Associate Editor Marc Laflamme. 30 8 2016 25 11 2016 Published by NRC Research Press 2017 Order Aulacopleurida Adrain, 2011 Family Marjumiidae Kobayashi, 1935...

.... Trilobita Devonian ontogeny systematics evolution Family aulacopleuridae Angelin, 1854 Subfamily otarioninae Richter & Richter, 1926 Genus Otarionella Weyer, 1965 Cyphaspis davidsoni Barrande, 1852 , Suchomasty Limestone (early late Emsian), Prague district, Czech...

... species, representing half the total number of specimens collected (52%, Fig. 14 a, c). The other groups with a moderate relative abundance are Acastidae (19%), Proetidae (19%) and Aulacopleuridae (10%). For comparison, in Ed4, the fauna is dominated by the members...

... assignment. It is referred to herein as the “ Agerina group”. When initially proposed, their authors assigned the genera variously to Bathyuridae Walcott, 1886 ( Agerina , Hexianella ), Otarionidae Richter and Richter, 1926 (now Aulacopleuridae Angelin, 1854 ) ( Otarionellina ), Asaphidae Burmeister...

... 1 and 2. Brezinski (1988a) assigned Dixiphopyge to the Aulacopleuridae. Adrain and Chatterton (1994) and Brezinski (1997) have shown that cranidial characters such as the bulbous glabella are consistent with the Otarioninae. Hahn and Hahn (1996) placed Dixiphopyge...

... . Rustán , J.J. , and Vaccari , N.E. , 2012 , The trilobite Maurotarion megacephalum sp. nov. (Aulacopleuridae) in the Lower Devonian of Argentina: phylogenetic and paleobiogeographic remarks : Revista Mexicana de Ciencias Geológicas , v. 29 , v. 346–354. Sabattini , N. , 1972 . Los...

... trilobites from the formation were illustrated by Kindle ( 1912 ), Butts ( 1941 ), and Burns ( 1991 ). Families represented are Proetidae, Aulacopleuridae, Brachymetopidae, Phacopidae, Dalmanitidae, Odontopleuridae, and Lichidae. Genera present, in current taxonomy and in addition to Viaphacops Maksimova...

... with five genera; Proetidae and Aulacopleuridae (Proetida) and Scutelluidae (Corynexochida), which are represented by only a few taxa. For comparison, trilobite palaeobiodiversity from the Emsian (according to data from Khaldi et al . 2016 ) and the Eifelian (this study) at global and regional scales...

... dalmanitid trilobite Dalmanitoides Delo, 1935, on the basis of new data from Argentina: Palaeontologia Electronica 15 . Rustán , J.J. , and Vaccari , N.E. , 2012 b, The trilobite Maurotarion megacephalum sp. nov. (Aulacopleuridae) in the Lower Devonian of Argentina: phylogenetic...

... nomenclature follows Bengston (1988) . Superfamily AULACOPLEUROIDEA Angelin, 1854 Family AULACOPLEURIDAE Angelin, 1854 Subfamily OTARIONINAE Richter and Richter, 1926 Genus MAUROTARION Alberti, 1969 The Holotype CEGH-UNC 12.734 ( Fig. 2.7–2.11, 2.13, 2.17 ) is a cranidium...