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[dinosaur] Clelandina + Kumimanu + dinosaur parasites (free pdfs)





Ben Creisler
bcreisler@gmail.com


Some new non-dino papers:

Christian F. Kammerer (2017)
Rediscovery of the holotype of Clelandina major Broom, 1948 (Gorgonopsia: Rubidgeinae) with implications for the identity of this species.
Palaeontologia Africana 52: 85â88
URI: http://hdl.handle.net/10539/23480
http://wiredspace.wits.ac.za/handle/10539/23480

Free pdf:
http://wiredspace.wits.ac.za/bitstream/handle/10539/23480/v52.2017.KAMMERER.Clelandina.pdf


No specimen number was given for the holotype of the rubidgeine gorgonopsian species Clelandina major Broom, 1948 in its original description. Historically, a specimen in the Rubidge Collection (RC 94) was considered to represent Broomâs type specimen for C. major. However, recent study has revealed that the holotype of C. major is in fact a different specimen in the McGregor Museum in Kimberley (MMK 5031). The morphology of this specimen is consistent with the genus Clelandina, contra work based on RC 94 that considered C. major referable to Aelurognathus. Clelandina major is here considered synonymous with the type species Clelandina rubidgei. MMK5031 represents only the fifth known specimen of this rare and unusual gorgonopsian.

ZooBank: urn:lsid:zoobank.org:pub:16329C1A-96DE-4C50-B5C6-B4ADDA213107 (http://www.zoobank.org)

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Free pdf:

Kumimanu biceae, n. gen. et sp.


Gerald Mayr, R. Paul Scofield, Vanesa L. De Pietri & Alan J. D. Tennyson (2017)
A Paleocene penguin from New Zealand substantiates multiple origins of gigantism in fossil Sphenisciformes.
Nature Communications 8, Article number: 1927 (2017)
doi:10.1038/s41467-017-01959-6
https://www.nature.com/articles/s41467-017-01959-6


One of the notable features of penguin evolution is the occurrence of very large species in the early Cenozoic, whose body size greatly exceeded that of the largest extant penguins. Here we describe a new giant species from the late Paleocene of New Zealand that documents the very early evolution of large body size in penguins. Kumimanu biceae, n. gen. et sp. is larger than all other fossil penguins that have substantial skeletal portions preserved. Several plesiomorphic features place the new species outside a clade including all post-Paleocene giant penguins. It is phylogenetically separated from giant Eocene and Oligocene penguin species by various smaller taxa, which indicates multiple origins of giant size in penguin evolution. That a penguin rivaling the largest previously known species existed in the Paleocene suggests that gigantism in penguins arose shortly after these birds became flightless divers. Our study therefore strengthens previous suggestions that the absence of very large penguins today is likely due to the Oligo-Miocene radiation of marine mammals.

News:

https://phys.org/news/2017-12-ancient-penguin-big-human-pittsburgh.html


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Free pdf:


Enrique PeÃalver, Antonio Arillo, Xavier DelclÃs, David Peris, David A. Grimaldi, Scott R. Anderson, Paul C. Nascimbene & Ricardo PÃrez-de la Fuente (2017)
Parasitised feathered dinosaurs as revealed by Cretaceous amber assemblages
Nature Communications 8, Article number: 1924 (2017)
doi:10.1038/s41467-017-01550-z
https://www.nature.com/articles/s41467-017-01550-z

Ticks are currently among the most prevalent blood-feeding ectoparasites, but their feeding habits and hosts in deep time have long remained speculative. Here, we report direct and indirect evidence in 99 million-year-old Cretaceous amber showing that hard ticks and ticks of the extinct new family Deinocrotonidae fed on blood from feathered dinosaurs, non-avialan or avialan excluding crown-group birds. A âCornupalpatum burmanicum hard tick is entangled in a pennaceous feather. Two deinocrotonids described as âDeinocroton draculi gen. et sp. nov. have specialised setae from dermestid beetle larvae (hastisetae) attached to their bodies, likely indicating cohabitation in a feathered dinosaur nest. A third conspecific specimen is blood-engorged, its anatomical features suggesting that deinocrotonids fed rapidly to engorgement and had multiple gonotrophic cycles. These findings provide insight into early tick evolution and ecology, and shed light on poorly known arthropodâvertebrate interactions and potential disease transmission during the Mesozoic.


News:

https://phys.org/news/2017-12-dinosaur-parasites-million-year-old-amber-blood-sucking.html


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