#eofringillirostrum

[a-dinosaur-a-day]

[albertonykus]

A selection of new dinosaurs named in 2019.

[a-dinosaur-a-day]

ITS TIME

FOR

DINOSAUR MARCH MADNESS 2k23!!!!!!!!!!!!

Starting NEXT WEEK, we begin the ultimate competition:

DMM: RISING STARS

These are ALL dinosaurs that have been discovered in the past five years!!! New friends from old times!!! Including such new fan favorites as Bajadasaurus, Jakapil, Meraxes, and Anachronornis - and that's only four of them!

From the weird to the wonderful, these dinosaurs are here to indicate that just because they were found recently, doesn't mean that they aren't destined to become icons like the names we already know and love. Get ready to learn about some new paleontological excitement - and debate angrily over which ones are better ;)

Round One will go from March 1st through the 7th

Round Two will extend from March 8th through the 14th

Round Three will then go from the 15th to the 21st

Round Four from the 22nd to the 28th

And the FINAL FOUR SHOWDOWN (Ornithischian Vs Sauropodomorph vs Nonavian theropod vs Bird) will occur from March 29th through April 4th!

Thanks to the new tumblr poll feature, reconstructions and mini factfiles for each dinosaur will be on the post with the poll itself! No need to leave tumblr, no personal research, no google quizzes - just rapid learning and immediate voting!

Get ready to vote! Get ready to debate! Get ready... for DINOSAUR MARCH MADNESS!

Round One Matchups under the readmore :)

SAUROPODOMORPHA (and miscellany)

Gnathovorax vs Mbiresaurus Bagualosaurus vs Issi

Ngwevu vs Kholumolumo Bagualia vs Amanzia

Lingwulong vs Bajadasaurus Lavocatisaurus vs Ruixinia

Abditosaurus vs Ibirania Australotitan vs Mansourasaurus

ORNITHISCHIA

Sanxiasaurus vs Changmiania Iyuku vs Sinocephale

Bisticeratops vs Crittendenceratops Kelumapusaura vs Gobihadros

Ajnabia vs Tlatolophus Jakapil vs Bashanosaurus

Stegouros vs Patagopelta Spicomellus vs Jinyunpelta

NONAVIAN THEROPODA

Berthasaura vs Vespersaurus Spectrovenator vs Riparovenator

Asfaltovenator vs Meraxes Suskityrannus vs Maip

Daurlong vs Natovenator Bannykus vs Ambopteryx

Caihong vs Hesperornithoides Falcatakely vs Janavis

NEORNITHES (BIRDS)

Vorombe vs Prodontopteryx Asteriornis vs Panraogallus

Anachronornis vs Conflicto Annakacygna vs Nasidytes

Aviraptor vs Cryptogyps Miosurnia vs Primoptynx

Danielsraptor vs Heracles Eofringillirostrum vs Heliothraupis

[a-dinosaur-a-day]

Eofringillirostrum vs Heliothraupis

Eofringillirostrum (left) or Heliothraupis (right)?

Eofringillirostrum

Heliothraupis

Voting ended onMar 9, 2023

Factfiles:

Eofringillirostrum boudreauxi, E. parvulum 

Artwork by @otussketching, written by @zygodactylus

Name Meaning: Dawn Finch-Beak (Boudreaux’s or Small) 

Time: 54 to 48 million years ago, in the Ypresian of the Eocene 

Location: Sandwich Beds, Fossil Butte Member, Green River Formation, Wyoming; and the Messel Formation near Darmstadt, Germany 

Today, over half of the birds known in the world are passerines, or “perching birds”. Unfortunately, these birds on average are small and delicate, leading to their not having the most robust fossil record compared to other birds. However, the fossils of passerines we do have tell us an interesting story about their evolution. Eofringillirostrum, despite being a very early member of the total-passeriform group (ie, it isn’t a true passerine, but close), shows how many of the traits we see in modern representatives occurred fairly early on in their evolution. Eofringillirostrum had a finch-like beak, similar to living species, that would have been helpful in eating small hard seeds - a niche not easily exploited. While we often think of birds as “seed-eaters”, this is not common and only exploitable by certain species - and, apparently, some early passerine relatives like Eofringillirostrum. This indicates that different early relatives of passerines were already doing very similar ecological jobs to their living relatives, even while many other bird types were exploiting passerine-like niches (such as the many types of stem-mouse birds that lived at the time). Both the Messel Pit and the Fossil Butte environments were tropical forests, emerging right after the Paleocene-Eocene Thermal Maximum; both were associated with fossil lakes, which allowed for rapid preservation of a variety of early animals that show how “modern” life first diversified in the Paleogene period. As such, Eofringillirostrum just has too many neighbors to list - including so many kinds of birds its a little overwhelming. Eofringillirostrum, in this environment, would have been one of many different species of birds, and weirdly modern looking among them! 

Heliothraupis oneilli 

Photograph by John C. Mittermeier, written by @zygodactylus 

Name Meaning: O’Neill’s Tanager of the Sun God Inti 

Time: Unknown to the present, Holocene, Quaternary 

Location: Western Bolivia and Southern Peru, South America  Rarely do we get to talk about a newly discovered living species of bird, but this is one of those excellent times! This bird, a bright yellow tanager with a distinctive black stripe across its eye, was found in the Neotropics - specifically in the Yungas region. Given that Latin America has the largest number of bird species in the world, it makes a certain amount of sense that we may have missed some! First spotted in the nineties, it was properly identified and described over the course of the 2010s. The distinctive appearance of this tanager lead to it being nicknamed the “Kill Bill Tanager”, in reference to its similarity to Uma Thurman’s yellow jumpsuit outfit. Distinct in appearance and population from other tanagers, it was deemed not only a separate species, but an entirely separate genus. It is migratory, breeding in the northern Machariapo Valley and going down to the eastern Andes for the nonbreeding season. It lives in deciduous forests, and breeds in bamboo grasses. It is a loud and vocal bird, making distinctive songs and choruses that happen long after the dawn chorus of most other birds. As it lives in a fairly isolated region of these countries, its habitat is not particularly threatened at this time.

DMM Round One Masterpost

[a-dinosaur-a-day]

Trick or treat !!!!!!

A floof gif!

Eofringillirostrum by @otussketching!

[albertonykus]

There were no finches or sparrows 50 million years ago. However, a new discovery shows that there was a different sort of seed-eating bird, Eofringillirostrum! I write more about it here.

Image from Ksepka et al. (in press).

[albertonykus]

Passerines represent 60% of modern bird diversity today, but we haven't found any fossils of them from the Eocene. Instead, their close relatives took up many of the niches that they would fill in the future. Unfortunately, by the middle Miocene, most of these stem-passerines had become extinct.

Full view

[taggthewanderer]

The 'perching birds,' or passerines, are the most common birds in the world today -- they include sparrows, robins, and finches. They used to be very rare. Scientists have just discovered some of the earliest relatives of the passerines, including a 52-million-year-old fossil with a thick, curved beak for eating seeds.