Schachner et al 2013 fig-13-full

Schachner et al. (2013: Figure 13): Diagrammatic representations of the crocodilian (A) and avian (B) lungs in left lateral view with colors identifying proposed homologous characters within the bronchial tree and air sac system of both groups. The image of the bird is modified from Duncker (1971). Abbreviations: AAS, abdominal air sac; CAS, cervical air sac; CRTS, cranial thoracic air sac; CSS, caudal sac-like structure; CTS, caudal thoracic air sac; d, dorsobronchi; GL, gas-exchanging lung; HS, horizontal septum; IAS, interclavicular air sac; L, laterobronchi; NGL, non-gas-exchanging lung; ObS, oblique septum; P, parabronchi; Pb, primary bronchus; Tr, trachea; v, ventrobronchi.

Gah! No time, no time. I am overdue on some things, so this is a short pointer post, not the thorough breakdown this paper deserves. The short, short version: Schachner et al. (2013) is out in PeerJ, describing airflow in the lungs of Nile crocs, and showing how surprisingly birdlike croc lungs actually are. If you’re reading this, you’re probably aware of the papers by Colleen Farmer and Kent Sanders a couple of years ago describing unidirectional airflow in alligator lungs. Hang on to your hat, because this new work is even more surprising.

I care about this not only because dinosaurian respiration is near and dear to my heart but also because I was a reviewer on this paper, and I am extremely happy to say that Schachner et al. elected to publish the review history alongside the finished paper. I am also pleasantly surprised, because as you’ll see when you read the reviews and responses, the process was a little…tense. But it all worked out well in the end, with a beautiful, solid paper by Schachner et al., and a totally transparent review process available for the world to see. Kudos to Emma, John, and Colleen on a fantastic, important paper, and for opting for maximal transparency in publishing!

UPDATE the next morning: Today’s PeerJ Blog post is an interview with lead author Emma Schachner, where it emerges that open review was one of the major selling points of PeerJ for her:

Once I was made aware of the transparent peer review process, along with the fact that the journal is both open access and very inexpensive to publish in, I was completely sold. […] The review process was fantastic. It was transparent and fast. The open review system allowed for direct communication between the authors and reviewers, generating a more refined final manuscript. I think that having open reviews is a great first step towards fixing the peer review system.

That post also links to this one, so now the link cycle is complete.


Schachner, E.R., Hutchinson, J.R., and Farmer, C.G. 2013. Pulmonary anatomy in the Nile crocodile and the evolution of unidirectional airflow in Archosauria. PeerJ 1:e60