Globins in the marine annelid Platynereis dumerilii shed new light on hemoglobin evolution in bilaterians.

"predicted sequences of pdu-l1 -l2a and -l2b were deposited in genbank (mw075674-mw075676).; sequences were deposited in genbank (mt701024-mt701042). availability of data and materials the data sets supporting the results of this article are available in the figshare repository ( https://figshare com/account/home#/projects/72548 ). availability of data and materials the data sets supporting the results of this article are available in the figshare"

"Competing interests The authors declare no competing interests."

"Funding S. Song obtained a PhD fellowship from the LABEX “WHO AM I?” (No.ANR-11-LABX-0071). The Balavoine Lab was funded by the CNRS, the Université de Paris and two grants from the ANR (METAMERE no. ANR-12- BSV2-0021 and TELOBLAST no. ANR-16- CE91-0007)."