Masillaraptoridae

Masillaraptorids; Temporal range: early-middle Eocene,
	Life restoration of Masillaraptor
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Falconiformes
Family:	†Masillaraptoridae; Mayr, 2009
Genera
	†Danielsraptor; †Masillaraptor;

Masillaraptoridae is an extinct family of stem-group falconiform birds from the Eocene of Europe. They are noted for their relatively long legs. Two genera have been named: Danielsraptor, from the London Clay of England, and Masillaraptor, from Messel Pit in Germany.^[1]^[2]^[3]

Description

Masillaraptorids had long legs, which may indicate that they had a terrestrial lifestyle, foraging on the ground similar to modern caracaras. They had large pygostyles, suggesting that they would have likely had long tail feathers. This, in addition to their long ulnae, suggest that they were capable of well-developed flight. Their beaks are similar to those of extinct phorusrhacids and extant caracaras.^[3]

Classification

The cladogram below displays the phylogenetic position of Masillaraptoridae within the Falconiformes:^[3]

Chauna torquata (southern screamer)

Australaves

Falconiformes

Caracara plancus (crested caracara)

†Masillaraptoridae

	Masillaraptor parvunguis

	Danielsraptor phorusrhacoides

Cariamiformes

†Bathornis spp.

†Dynamopterus spp.

Cariama cristata (red-legged seriema)

†Phorusrhacidae (terror birds)

	Llallawavis scagliai

	Psilopterus lemoinei

	Patagornis marshi

References

↑ Mayr, Gerald (January 2006). "A new raptorial bird from the Middle Eocene of Messel, Germany". Historical Biology. 18 (2): 99–106. doi:10.1080/08912960600640762. ISSN 0891-2963. S2CID 34895565.
↑ Mayr, Gerald (2009-05-20). "A well-preserved second trogon skeleton (Aves, Trogonidae) from the middle Eocene of Messel, Germany". Palaeobiodiversity and Palaeoenvironments. 89 (1–2): 1–6. doi:10.1007/s12549-009-0001-9. ISSN 1867-1594. S2CID 73722121.
1 2 3 Mayr, Gerald; Kitchener, Andrew C. (2022-07-08). "New fossils from the London Clay show that the Eocene Masillaraptoridae are stem group representatives of falcons (Aves, Falconiformes)". Journal of Vertebrate Paleontology. 41 (6): e2083515. doi:10.1080/02724634.2021.2083515. ISSN 0272-4634. S2CID 250402777.

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[1] Mayr, Gerald (January 2006). "A new raptorial bird from the Middle Eocene of Messel, Germany". Historical Biology. 18 (2): 99–106. doi:10.1080/08912960600640762. ISSN 0891-2963. S2CID 34895565.

[2] Mayr, Gerald (2009-05-20). "A well-preserved second trogon skeleton (Aves, Trogonidae) from the middle Eocene of Messel, Germany". Palaeobiodiversity and Palaeoenvironments. 89 (1–2): 1–6. doi:10.1007/s12549-009-0001-9. ISSN 1867-1594. S2CID 73722121.

[Danielsraptor-3] 1 2 3 Mayr, Gerald; Kitchener, Andrew C. (2022-07-08). "New fossils from the London Clay show that the Eocene Masillaraptoridae are stem group representatives of falcons (Aves, Falconiformes)". Journal of Vertebrate Paleontology. 41 (6): e2083515. doi:10.1080/02724634.2021.2083515. ISSN 0272-4634. S2CID 250402777.

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