Table 1.

Oxytocin- and vasopressin-like peptide sequences across the animal kingdom

Phylum	Animal group	Peptide	Sequence	Reference
Vertebrata	Mammals/humans	Oxytocin	CYIQNCPLG*	Du Vigneaud et al. ()1953; Tuppy ()1953; Gruber & Muttenthaler ()2012
		[Arg8]-Vasopressin	CYFQNCPRG*	Acher & Chauvet ()1953; Gruber & Muttenthaler ()2012
	Non-mammalian vertebrates	Vasotocin	CYIQNCPRG*	Acher et al. ()1960
Arthropoda	Insects	Inotocin	CLITNCPRG*	Proux et al. ()1987; Stafflinger et al. ()2008; Gruber & Muttenthaler ()2012
		Inotocin	CLIVNCPRG*	Gruber & Muttenthaler ()2012
	Arachnids	Arachnotocin	CFITNCPPG*†	Present study
		Arachnotocin	CFITNCPIG*‡	Present study
	Myriapods	Myriatocin	CYITNCPPG*§	Present study
	Crustaceans/brachiopods	Oxytocin-/vasopressin-like	CFITNCPPG*	Stafflinger et al. ()2008
Annelida	Earthworms	Annetocin	CFVRNCPTG*	Oumi et al. ()1994
	Leeches	Lys-conopressin-G	CFIRNCPKG*	Salzet et al. ()1993
Mollusca	Cephalopods	Cephalotocin	CYFRNCPIG*	Reich ()1992
		Octopressin	CFWTSCPIG*	Takuwa-Kuroda et al. ()2003
	Gastropods	Lys-conopressin-G	CFIRNCPKG*	Cruz et al. ()1987; Martínez-Padrón et al. ()1992; McMaster et al. ()1992; van Kesteren et al. ()1992
Nematoda	Caenorhabditis elegans	Nematocin	CFLNSCPYRRY*	Beets et al. ()2012; Garrison et al. ()2012

^*C-terminal amidation. Sequences were discovered by genome mining according to Gruber & Muttenthaler ()²⁰¹² from the following species:

^†the red spider mite Tetranychus urticae (GenBank: CAEY01002026.1);

^‡the predatory mite Metaseiulus occidentalis (GenBank: AFFJ01003937.1); and

^§the centipede Strigamia maritima (GenBank: AFFK01014417.1).