{"refrec":{"BRefID":287985,"RR":"<b>Böttger-Schnack, R.; Schnack, D.</b> (2013). Definition of species groups of Oncaeidae (Copepoda: Cyclopoida) as basis for a worldwide identification key. <i>J. Nat. Hist. 47(5-12)</i>: 265-288. <a href=\"https://dx.doi.org/10.1080/00222933.2012.708453\" target=\"_blank\">https://dx.doi.org/10.1080/00222933.2012.708453</a>","BEntID":280010,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Nat. Hist. 47(5-12)</i>: 265-288. <a href=\"https://dx.doi.org/10.1080/00222933.2012.708453\" target=\"_blank\">https://dx.doi.org/10.1080/00222933.2012.708453</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Böttger-Schnack, R.; Schnack, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Böttger-Schnack, R.; Schnack, D.","Englishabstract":"The copepod family Oncaeidae is widely distributed in the world's oceans and includes many small and abundant species. Due to their small size and the existence of sister and sibling species in different parts of the ocean, species identification is very difficult. Quantitative studies on copepod communities usually consider oncaeids at the family level only, or present uncertain species names, when based on regional identification keys not established for the study area. This paper aims to develop the basis for an improved taxonomic resolution of oncaeids in ecological studies. It summarizes the most relevant morphological elements to characterize the seven presently known genera and to define in addition 16 species groups within the paraphyletic taxon <i>Oncaea</i> s.l. 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