"PeerJ Preprints" is a venue for early communication or feedback before peer review. Data may be preliminary.

A peer-reviewed article of this Preprint also exists.

View peer-reviewed version

Supplemental Information

List of extant and fossil specimens

DOI: 10.7287/peerj.preprints.27618v1/supp-2

Cranial and dental measuring distances

DOI: 10.7287/peerj.preprints.27618v1/supp-3

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Nicola S Heckeberg conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Gert Wörheide contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Data Deposition

The following information was supplied regarding data availability:

All raw data are provided in the supplemental files as indicated in the main text.


This work was supported by the German Research Foundation (DFG: RO 1197/7-1); NSH received financial support from the German Academic Exchange Service (DAAD; D/11/42358), the Elitenetzwerk Bayern, and SYNTHESYS (FR-TAF-1768, ES-TAF-2518, NL-TAF-3044). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Add your feedback

Before adding feedback, consider if it can be asked as a question instead, and if so then use the Question tab. Pointing out typos is fine, but authors are encouraged to accept only substantially helpful feedback.

Some Markdown syntax is allowed: _italic_ **bold** ^superscript^ ~subscript~ %%blockquote%% [link text](link URL)
By posting this you agree to PeerJ's commenting policies
  Visitors   Views   Downloads