Schlagwort-Archive: Early Eocene

Vanolimicola longihallucis Mayr

This species was described in 2017, it is one of the many birds from the Messel shale, that are somehow related to living ones but on the other hand again … are completely different.  

This one is thought to be related to the Charadriiformes, and it may indeed have been a member of the jacana family (Jacanidae).   

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my reconstruction sketch, which turns out very much jacana-unlike

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BTW: I only recently learned that the age of the Messel shale spans from the upper Early – to the lower Middle Eocene.  

So not every bird from there is from the Middle Eocene.

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edited:

04.08.2019

Morsoravis sedilis Bertelli, Lindow, Dyke & Chiappe

This bird was described in 2010, it was then thought to be somehow related to the Charadriiformes respectively to the Charadriiformes “orbit”, later it was assumed to belong in some kind of relationship with other likewise “well-known” birds like Eocuculus cherpinae (Chandler), or Pumiliornis tessellatus Mayr.

The reconstruction shows a tiny bird, some 12 cm long, with a sharp-pointed beak and a quite long neck, such a bird would have needed long tail feathers to stabilize its body – so I just gave it a long tail, cause the feathers are not preserved in the Fur Formation birds.

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So here is how all begins, some cut-out bone drawings put together, lines made with a pencil etc..:

some puzzling

The final result is a quite life-like bird, maybe I got enough time to make a real painting, with colors and so on ….:

not charadriiform-alike at all

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References:

[1] Sara Bertelli; Bent K. Lindow; Gareth J. Dyke; Luis M. Chiappe: A well-preserved ‘charadriform-like’ fossil bird from the Early Eocene Fur Formation of Denmark. Paleontology 53(3): 507-531. 2010
[2] Gerald Mayr: On the osteology and phylogenetic affinitis of Morsoravis sedilis (Aves) from the early Eocene Fur Formation of Denmark. Bulletin of the Geological Society of Denmark 59: 23-35. 2011

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edited: 22.01.2018

‘Neanis’ kistneri (Feduccia)

‘Neanis’ kistneri, the genus name written in quotation marks, because the bird does not belong into the genus Neanis, which otherwise includes a single species, Neanis schucherti Shufeldt, is a probable member of order Piciformes, and may be somewhat related to the family Galbulidae.

The species is known so far from a single, nearly complete skeleton, and, like so many Eocene birds, it was a dwarf.

This, of course, is just a sketch.

Songzia spp.

This genus currently contains two species, which mainly differ by their size, Songzia acutunguis Wang et al. and the slightly smaller Songzia heidangkouensis Hou.

These two species have much in common with the recent species of the rail family, yet may not be related to them, but may be closer to the extinct Messel ‘Rails’, the Messelornithidae, which themselves may or may not be members of the Gruiformes.

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The two Songzia ‘Rails’ are small, sparrow-sized birds, in life they probably inhabited the margins of lakes and other swampy areas.

The picture is just a sketch.

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Feather impressions are not known to my knowledge, however, I thought it would be a good idea to give the bird somewhat elongated tail feathers, since the feather impressions in some messelornithid fossils show that these birds had very long tail feathers.

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source:

>Min Wang; Gerald Mayr; Jiangyong Zhang; Zhonghe Zhou: Two new skeletons of the enigmatic, rail-like avian taxon Songzia Hou, 1990 (Songziidae) from the early Eocene of China. Alcheringa: An Australian Journal of Palaeontology 36: 487-499. 2012