Minmi ‭(‬After Minmi crossing,‭ ‬Australia‭)

Short Info

Minmi ‭(‬After Minmi crossing,‭ ‬Australia‭)

Phonetic : Min-me.

Named By : Ralph Molnar‭ ‬-‭ ‬1980

Diet : Herbivore

Size : Estimated 2 – 3 meters long

Type of Dinosaur : Armoured Dinosaur

Type Species : M.‭ ‬paravertebra‭ (‬type‭)

Found in : Australia,‭ ‬Minmi crossing

When it Lived : Early Cretaceous, 121-112 million years ago

Minmi is an ankylosaurian small herbivorous ankylosaurian dinosaur genus that lived in Australia’s early Cretaceous Period, approximately 133-120 million years ago.

1964: Dr Alan Bartholomai (a Queensland Museum collaborator) discovered a chalkstone nodule that contained an ankylosaurian skull in Queensland. It was located near Minmi Crossing on the Injun Road. One kilometre south of Mack Gulley and north of Roma.

Ralph E. Molnar, an 80-year-old researcher, named and described Minmi paravertebra, the type species. Minmi Crossing was the generic name for the Mesozoic dinosaur that was at the time the shortest. Minmi’s meaning is ambiguous. It refers to a large lily, but it could also be derived form min min, which is a type of will-o-the-wisp. Paravertebrae is the name Molnar gave to the strange bone elements that are found between the vertebrae.

The holotype, QM F10329, was discovered in a layer of the Bungil Formation, the Minmi Member, a lagoon deposit which was first dated to the Barremian-Valanginian, but later was recalibrated to the Aptian. It is a partial skull-less skeleton. It retains eleven back vertebrae, the right hindlimb and plates of the stomach armour. It was the first thyreophoran specimen to be found in the Southern Hemisphere.

A more complete skeleton, QM F1801, was found in 1989. It includes the skull and has articulated body armor. It was called a Minmi species. Most information on Minmi found in books or illustrations has been based on the second exemplar since 1989. However, Kunbarrasaurus was officially named in 2015.

Many other specimens were found between 1989 and 1996 and eventually referred to Minmi sp. These include QMF33286, a rump with osteoderms and pelvis; AMF35259: ribs and ribs; QMF33565: a partial hipbone; QMF33565; and QMF33566: a partial spine. It is possible that these specimens are related to QMF33565. AM F35259 is part the Australian Museum’s collection. QM F119849, a later specimen, was also reported. It consisted of osteoderms and ribs.

Minmi was an herbivorous, quadrupedal-armoured ankylosaurian that was small and herbivorous. Gregory S. Paul, in 2016, estimated Minmi’s length to be 3 metres (9.8 feet) and its weight to be 300 kilograms (660lb). Minmi was an ankylosaurian with long limbs. It may have used its long limbs to search for cover under brush when it was threatened by large predators that might have been capable of flipping the small animal on its stomach.

Minmi, unlike other ankylosaurians had horizontally-oriented plates of bone that ran along its vertebrae. This is why it was called paravertebra. Molnar, in 1980, acknowledged that these were ossified tendon. However, he denied that they were similar to other Ornithischia’s ossified tendon. He claimed that they looked like modern crocodiles’ pathological tendon-aponeurosis. Victoria Megan Arbour, a 2014 researcher, found only one autapomorphy within the holotype. The high vertical extent at the outer front of the tendon musculus-articulospinalis tendon of ossification wrapping itself around the vertebra. Arbour and Currie concluded in 2015 that this was not a unique finding, and Minmi would become a nomen dubium.  The 2015 description of Kunbarrasaurus revealed that Minmi’s distinguishing characteristics had been discovered, and it should be considered valid taxon.

Source: Wikipedia