Anserimimus ‭(‬Goose mimic‭)

Short Info

Anserimimus ‭(‬Goose mimic‭)

Phonetic : An-ser-e-mime-us.

Named By : Rinchen Barsbold‭ ‬-‭ ‬1988.

Diet : Carnivore

Size : Estimated 3 meters long

Type of Dinosaur : Large Theropod

Type Species : A.‭ ‬planinychus‭ (‬type‭))

Found in : Mongolia,‭ ‬Bayankhongor Province‭ ‬-‭ ‬Nemegt Formation.

When it Lived : Late Cretaceous, 84-65 million years ago

Anserimimus (/,aens@rI’maIm@sAnserimimus (/,aens@rI’m@s “goose mimic”) is a genus belonging to the ornithomimid dinosaurs, which was found in an era of Late Cretaceous Period of what is today Mongolia. It was a tall and fast-running animal, perhaps an all-animal. Based on the fossils that are available the animal probably very closely looked like other ornithomimids apart from its larger forelimbs.

Anserimimus was discovered inside the Mongolian aimag or province of Bayankhongor during an expedition by Soviet and Mongolian towards the Gobi Desert in the latter part of the 1970s. Mongolian paleontologist Rinchen Barsbold was the first to name Anserimimus on the 28th of October, 1988. which combines the Latin anser, which means “goose” with the Greek mimos, which means’mimic’. Anser is the general name for a variety of species of geese. While Anserimimus is not particularly akin to the goose, ornithomimosaurs have been historically named after different kinds of birds, like Struthiomimus (‘ostrich mimic’), Gallimimus (‘rooster mimic’), and Pelecanimimus (‘pelican mimic’). The only species named after Anserimimus is named Anserimimus planinychus. The name itself is derived from Latin planus which translates to flat and also an Ancient Greek onux, onyx meaning ‘claw’ as a reference to the unique claws that are flattened, which make up the Genus.


Anserimimus
Jordi Payà from Barcelona, Catalonia, CC BY-SA 2.0, via Wikimedia Commons


There is just one Anserimimus fossil and its Holotype IGM 100/300. It is comprised of a fully articulated and articulated skeleton that is missing the lower jaw and skull. A few studies have been conducted about anatomical features of Anserimimus since Barsbold was not able to describe the majority of the bones, instead choosing only the ones with distinctive features that distinguish Anserimimus different from all other ornithomimids. In a thesis unpublished, Robert Bronowicz in 2005 gave an in-depth explanation of the species and providing additional information to it and a partial skeleton of the sample ZPAL MgD-I/65. In 2010, Bronowicz was able to conclude that this additional find which was the closest in relation to Anserimimus planinychus, was likely the existence of a distinct taxon.

Anserimimus was an ornithomimosaurian of medium size. Gregory S. Paul in 2010 estimated its length as three metres, and its weight of fifty kilograms. The thighbone measures approximately 435 millimetres in length.

There are many key differences in it from the related species, although most of them are shared in ZPAL’s MgD-I/65. Hand claws are lengthy and low in the back, and quite straight, with a slight curve and the surface almost flat. The forelimbs are long and built stronger than the other ornithomimids. It has huge scapulocoracoid crests. the shoulder as well as the humerus (upper the arm bone) which served as the attachment points for arm muscles such as the biceps. The hand’s metacarpus is fused, which increases the strength. The foot is arctometatarsalian in nature and the third metatarsal separating from the front of the metatarsus, for over 40 percent of its upper length.

Source: Wikipedia