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The el Montsec bird enters the LRT basal to the Sulcavis clade

Wednesday, January 12, 2022 13:33

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Originally (Sanz et al. 1997) considered a nestling,
and then (Cambra-Moo et al. 2006) a subadult, the still unnamed el Montsec bird is basal to two clades of named enantiornithine birds, some of them smaller.

Figure 3. Subset of the LRT focusing on basal birds. Blue taxa are all Solnhofen birds (= traditional Archaeopteryx). Sulcavis and the el Montsec bird are highlighted in yellow.

Though small and originally considered a nestling,
this specimen also nests basal to other small Cretaceous birds, then large Cretaceous birds leading to modern birds. Sinornis and Iberomesornis are smaller. So, let’s give this bird a name!

Figure 3. Sulcavis and the el Montsec bird to scale with Archaeornithura, Iberomesornis, Fortunguavis and Cratoavis.

References
Cambra-Moo O, et al. (5 co-authors) 2006. Estimating the ontogenetic status of an enantiornithine bird from the Lower Barremian of El Montsec, Central Pyrenees, Spain. Estudios Geologicos 62(1):241-248.
Sanz JL et al. (9 co-authors) 1997. A nestling bird from the Lower Cretaceous
of Spain: Implications for avian skull and neck evolution. Science 276:1543–1546.

wiki/Sulcavis

Source: https://pterosaurheresies.wordpress.com/2022/01/13/the-el-montsec-bird-enters-the-lrt-basal-to-the-sulcavis-clade/

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