Mahakala omnogovae

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Mahakala
Temporal range:
Ma
Diagram of known elements from the holotype
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: Dromaeosauridae
Subfamily: Halszkaraptorinae
Genus: Mahakala
Turner et al., 2007
Type species
Mahakala omnogovae
Turner et al., 2007

Mahakala (IPA:

Djadokhta Formation of Ömnögovi, Mongolia. It is based on a partial skeleton found in the Gobi Desert. Mahakala was a small dromaeosaurid, and its skeleton shows features that are also found in early troodontids and avialans. Despite its late appearance, it is among the most basal dromaeosaurids. Its small size, and the small size of other basal deinonychosaurians, suggests that small size appeared before flight capability in birds. The genus is named for Mahakala, one of eight protector deities (dharmapalas) in Tibetan Buddhism
.

Artist's reconstruction of Mahakala as a halszkaraptorine

Description

deinonychosaur
Size compared to a human, reconstructed as a generic deinonychosaur

Mahakala was a small dromaeosaurid, measuring 50–70 cm (20–28 in) long and weighing 400–700 g (14–25 oz).

metatarsal was not compressed, suggesting that the uncompressed version was the basal version. It had a typical dromaeosaurid form of the second toe, with an expanded claw.[1]

Classification

A

theropods found at the base of paravian lineages, suggest that small size was not an innovation of early birds, but a common trait of early paravians; small size would have preceded flight and would not have been a special avian autapomorphy as the result of a size squeeze. Like birds, troodontids and dromaeosaurids were not small throughout their evolutionary history, and showed size increases among several different lineages. Mahakala has a combination of characteristics found among basal troodontids and birds, but lacks some that are present in more derived dromaeosaurids.[1] A study in 2017 found that Mahakala was a member of the enigmatic, basal subfamily Halszkaraptorinae.[3]

The cladogram below is based on the phylogenetic analysis conducted in 2017 by Cau et al. using updated data from the Theropod Working Group in their description of Halszkaraptor.[3]

Dromaeosauridae

Paleoecology and paleobiology

The paleoenvironment of the Djadokhta Formation is interpreted as having a

are known to be strong swimmers, this suggests that Mahakala may too have been a strong swimmer like the other members of its family.

See also

References

External links