...V. H. REYNOSO Abstract The sphenodontian Ankylosphenodon pachyostosus new genus and species is the second unusual sphenodontian reported from the Albian deposits of the Tlayua Formation, near Tepexi de Rodríguez, Central Mexico. The skeleton is robust with pachyostotic ribs and vertebrae. Unique...

...Rodney M. Feldmann; Francisco J. Vega; Shelton P. Applegate; Gale A. Bishop Abstract The arthropod macrofauna from the Middle Member of the lithographic limestones of the Tlayua Formation, in quarries at Tepexi, Mexico, is comprised of marine and nonmarine components. Marine taxa include a new...

... the Tlayua Formation, Puebla, Mexico. In addition, the study confirms a shallow nearshore depositional environment for the Tlayua Formation. Petrographic observations of fenestral fabrics, gypsum crystal molds, stromatolitic structures, and pedogenic matrix birefringence fabric support the interpretation...

... ). Archaeoniscus texanus Wieder and Feldmann, 1992 was collected from the Upper Cretaceous Austin Chalk, Texas, presumably representing the youngest occurrence of the genus. Archaeoniscus aranguthyorum Feldmann, Vega, Applegate and Bishop, 1998 was documented from the middle member of the Tlayúa Formation...

.... Bishop G. A. 1998 . Early Cretaceous arthropods from the Tlayúa Formation at Tepexi de Rodríguez, Puebla, Mexico . Journal of Paleontology , 72 : 79 – 90 . Fielitz C. González...

... contents of fish in other decapod-bearing Lägerstatten such as the lower Eocene Green River Formation in the United States, the Upper Jurassic (Kimmeridgian–Tithonian) Solnhofen Limestone in Germany, the Lower Cretaceous (Albian) Tlayúa Formation in Mexico, and the Middle Jurassic (Callovian) La Voulte-sur...

... of central Mexico : Journal of Vertebrate Paleontology , v. 17 , p. 52 – 59 . Reynoso , V.H. , 2000 , An unusual aquatic sphenodontian (Reptilia: Diapsida) from the Tlayua Formation (Albian), central Mexico : Journal of Paleontology , v. 74 , p. 133 – 148 . Reynoso , V.H. , 2005...

... positions concerning the number of independent transitions to the sea, but in all cases we analyzed the available phylogenetic and fossil evidence carefully. We discuss several cases below. Reynoso ( 2000 ) tentatively suggested that the Albian sphenodontian Ankylosphenodon from the Tlayúa Formation...

... of the Mesozoic stratigraphic setting of PCP-basin system in the UMS Domain. On the top of the structural highs (PCPs) only thin (up to 40 m) condensed and fossiliferous successions (“Bugarone Group”, Pliensbachian p.p. -Tithonian p.p. – G alluzzo & S antantonio , 2002 ; “Bugarone Formation” in J...