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The osteology of Rahonavis ostromi

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Old Saturday 27th June 2020, 16:32   #1
Fred Ruhe
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The osteology of Rahonavis ostromi

Catherine A. Forster, Patrick M. O’Connor, Luis M. Chiappe & Alan H. Turner, 2020

The osteology of the Late Cretaceous paravian Rahonavis ostromi from Madagascar

Palaeontologia Electronica. 23 (2): Article number 23(2):a29. doi:10.26879/793

Free pdf:
https://palaeo-electronica.org/content/pdfs/793.pdf

Abstract: https://palaeo-electronica.org/conte...y-of-rahonavis

Rahonavis ostromi, a paravian from the Maastrichtian Maevarano Formation, Mahajanga Basin, northwestern Madagascar, preserves morphology germane to understanding the character transformations present among paravian theropods, and in particular, among those non-avialan theropods most closely related to birds. The holotype specimen consists of a partial axial column (including cervicodorsal, dorsal, sacral, and caudal vertebrae and chevrons), most of the hind limbs and pelvis, and a partial forelimb (scapula, ulna, radius). Additional isolated elements referred to Rahonavis include distal humeri, a partial dentary, and a second right ulna; the duplicate right ulna demonstrates that at least two individuals of Rahonavis are present in the collection. All specimens of Rahonavis were recovered from the same level in quarry MAD 93-18 in 1995. All elements are described in detail and illustrated in multiple views, including CT slices of select elements to demonstrate internal morphology. Recent phylogenetic analyses place Rahonavis either within the non-avialan Unenlagiinae, an early-diverging clade within Dromaeosauridae, or at the base of Avialae. Rahonavis is one of the best represented and preserved Gondwanan paravians, and remains a pivotal taxon for understanding the evolution and biogeography of paravians.

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Fred

Last edited by Fred Ruhe : Sunday 28th June 2020 at 04:44.
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Old Sunday 28th June 2020, 19:22   #2
Fred Ruhe
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For the original description of Rahonavis ostromi see:

Catharine A. Forster, Luis M. Chiappe, David W. Krause & Scott D. Sampson, 1996
The First Cretaceous Bird from Madagascar
Nature 382: 532-534, 8 augustus 1996

Free pdf: https://www.researchgate.net/publica...rom_Madagascar

and

Catharine A. Forster, Scott D. Sampson, Luis M. Chiappe, David W. Krause, 1998
Genus Correction
Science 280: 179

Genus Correction The name Rahona, which we recently proposed as a genus name for a basal avian from the Late Cretaceous of Madagascar (Reports, 20 Mar., p. 1915), is already occupied by the lymantriid lepidopteran Rahona Griveaud, (1). We therefore propose the replacement name Rahonavis for this genus, whose type species is Rahonavis ostromi.

Fred

Last edited by Fred Ruhe : Sunday 28th June 2020 at 19:26.
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