The sauropod dinosaur “Pelorosaurus” becklesii was named in 1852 on the basis of an associated left humerus, ulna, radius and skin impression from the Early Cretaceous (Berriasian-Valanginian) Hastings Beds Group, near Hastings, East Sussex, southeast England, United Kingdom. The taxonomy and nomenclature of this specimen have a complex history, but most recent workers have agreed that “P.” becklesii represents a distinct somphospondylan (or at least a titanosauriform) and is potentially the earliest titanosaur body fossil from Europe or even globally. The Hastings specimen is distinct from the approximately contemporaneous Pelorosaurus conybeari from Tilgate Forest, West Sussex. “P.” becklesii can be diagnosed on the basis of five autapomorphies, such as: a prominent anteriorly directed process projecting from the anteromedial corner of the distal humerus; the proximal end of the radius is widest anteroposteriorly along its lateral margin; and the unique combination of a robust ulna and slender radius. The new generic name Haestasaurus is therefore erected for “P.” becklesii. Three revised and six new fore limb characters (e.g. the presence/absence of condyle-like projections on the posterodistal margin of the radius) are discussed and added to three cladistic data sets for Sauropoda. Phylogenetic analysis confirms that Haestasaurus becklesii is a macronarian, but different data sets place this species either as a non-titanosauriform macronarian, or within a derived clade of titanosaurs that includes Malawisaurus and Saltasauridae. This uncertainty is probably caused by several factors, including the incompleteness of the Haestasaurus holotype and rampant homoplasy in fore limb characters. Haestasaurus most probably represents a basal macronarian that independently acquired the robust ulna, enlarged olecranon, and other states that have previously been regarded as synapomorphies of clades within Titanosauria. There is growing evidence that basal macronarian taxa survived into the Early Cretaceous of Europe and North America.
Arguments are presented for and against a series of hypotheses about the influence of the parliamentary party system on the stability of governments, and the hypotheses are tested against data on 196 governments in parliamentary democracies since 1945. A strong relation is found between the duration of governments and the fragmentation of the parliamentary party system and of the government parties, but the fragmentation of the opposition parties seems not to affect stability. One-party governments are more stable than coalition governments, and majority governments more than minority governments. The ideological dispersion of the parties—in the whole parliament, in the government, or in the opposition—does not explain stability any better than fragmentation, which is based upon only the number and sizes of parties; but the proportion of seats held by ‘anti-system’ parties (communists and neo-fascists, mainly) is a good indicator of stability. The best explanation of government stability found here is the combined linear influence of the size of the anti-system parties and the fragmentation of the pro-system parties.
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