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Cast of specimen UFRGS PV0725T with reconstructed head and neck. Guaibasaurus was originally named on the basis of the holotype, MCN PV2355, a well-preserved partial postcranial skeleton and the paratype, MCN PV2356, an articulated and nearly complete left hindlimb, which were discovered in the "Sesmaria do Pinhal 2" locality near Candelária, Rio Grande do Sul, in Brazil, in the upper portion ...
Pisanosaurus is the type genus of the Pisanosauridae, a family erected by Casamiquela in the same paper which named Pisanosaurus. [4] The family Pisanosauridae has fallen into disuse; a 1976 study considered the group synonymous with the already named Heterodontosauridae , [ 2 ] though this is not followed by more recent studies.
Photograph of freshly caught specimen taken by Ernie Choy at pier shows head with undamaged eye; used by Nilsson et al. to estimate eye and pupil diameter on basis of standard fuel hose visible in frame (findings of paper summarised by Partridge, 2012; challenged by Schmitz, 2013; Schmitz et al., 2013a, b; defended by Nilsson et al., 2013).
However, in a 2008 paper, Cesare Baroni Urbani of the University of Basel, Switzerland, noted that the specimen shares some traits found in other ant subfamilies and some wasps, and lacks key diagnostic traits (synapomorphies) of the ant family, Formicidae, and thus argued Macabeemyrma could only be confidently classified as incertae sedis ...
Santa Maria Formation. Source: UFSM The Santa Maria Formation is a sedimentary rock formation found in Rio Grande do Sul, Brazil.It is primarily Carnian in age [3] [4] [5] (Late Triassic), [6] [7] and is notable for its fossils of cynodonts, "rauisuchian" pseudosuchians, and early dinosaurs and other dinosauromorphs, [8] [9] including the herrerasaurid Staurikosaurus, the basal sauropodomorphs ...
The largest known specimen, previously referred to the discredited genus Frenguellisaurus, had a skull measuring 56 cm (22 in) in length and a total body length estimated at 6 meters (20 ft). [ 58 ] [ 52 ] Though Herrerasaurus was the earliest dinosaur collected from the formation in the 1960s, [ 59 ] the most complete specimen, a juvenile, was ...
Scale diagram showing the holotype specimen (red) and the largest-known specimen (gray), compared in size with a human. Herrerasaurus was a lightly built bipedal carnivore with a long tail and a relatively small head. Adults had skulls up to 56 cm (22 in) long and were up to 6 m (20 ft) in total length [4] and 350 kg (770 lb) in weight. [38]
N. macrops worker specimen collected by Taylor. The first collection of Nothomyrmecia was made in December 1931 by amateur entomologist, Amy Crocker, [a] whose colleagues had collected a range of insect samples for her during a field excursion, including specimens of two worker ants, reportedly near the Russell Range, inland from Israelite Bay in Western Australia.