A new genus and species of primitive-limbed mosasauroid, Dallasaurus turneri, from the Middle Turonian (~92 Ma) of north-central Texas, is described on the basis of two incomplete skeletons. The new taxon retains plesiomorphic characters such as facultatively terrestrial limbs (plesiopedal) but also exhibits certain characters shared with derived mosasaurs of the subfamily Mosasaurinae. In phyl...

Phylogenetic nomenclature (e.g., de Queiroz & Gauthier, 1990, 1992, 1994; Camino & de Queiroz, 2000) is an alternative to the traditional system of nomenclature described in the bacteriological, botanical, and zoological codes (e.g., Sneath, 1992; Ride & al., 1999; Greater & al., 2000). The most fundamental difference between phylogenetic and traditional nomenclature concerns the manner in whic...

We describe a new semionotiform fish, Tlayuamichin itztli gen. et sp. nov. from the Early Cretaceous (Albian) of Mexico, which constitutes one of the youngest semionotid articulated remains. The new taxon is represented by five well-preserved specimens from the Tlayúa Quarry near Tepexi de Rodríguez in Puebla State, central Mexico. A series of paraethmoid bones anterior to the supraorbital seri...

The organization of gall on the ovary ofSesamum indicum L induced by the gall midge, Asphondylia sesami Felt, not only affects biochemical equilibrium of the host but also causes disturbed vegetative growth and reduced seed-setting. The toxicity created by the gall maker induces the re-orientation of vasculature Cecidogenetic stimuli lead to excessive hypertrophy and hyperplasy forming the gall...