{"refrec":{"BRefID":288068,"RR":"<b>Todd, J.A.; Johnson, K.G.</b> (2013). Dissecting a marine snail species radiation (Conoidea: Turridae: <i>Polystira</i>) over 12 million years in the Southwestern Caribbean. <i>Bull. Mar. Sci. 89(4)</i>: 877-904. <a href=\"https://dx.doi.org/10.5343/bms.2012.1083\" target=\"_blank\">https://dx.doi.org/10.5343/bms.2012.1083</a>","BEntID":280093,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Bull. Mar. Sci. 89(4)</i>: 877-904. <a href=\"https://dx.doi.org/10.5343/bms.2012.1083\" target=\"_blank\">https://dx.doi.org/10.5343/bms.2012.1083</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Todd, J.A.; Johnson, K.G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Todd, J.A.; Johnson, K.G.","Englishabstract":"The specialized carnivorous conoidean <i>Polystira</i> comprises the largest marine snail species radiation in the neotropics with approximately 120 living species known and a rich neogene fossil record. Here we analyze its patterns of species richness, origination, and extinction over the past 12 My in the southwestern caribbean (SWC). Taxic analysis of a database comprising 3344 specimens and 114 species shows species richness and sampling intensity to co-vary over this interval. Richness is lowest in the late miocene (pre-NN11), then rises and remains approximately constant until the recent, when it rises sharply. No large peaks in fossil origination rates occur, though extinction rates may increase between 2 and 1 ma. Well-sampled extinct species had median durations of 0.8–1.75 My, but the large majority of species are rare, confined to one or a few horizons, and have durations of <1 My.  <i>Polystira</i> shows the highest species origination rates recorded among marine gastropods (0.585–0.935 My<sup>-1</sup>), combined with short species durations; 94% of living species evolved within the past 1.6 My. This contrasts with longer durations and slower speciation rates in the hyperdiverse conoidean Conus, but that pattern requires restudy. High post-isthmian diversity—coinciding with increased habitat heterogeneity—contrasts with the massive decline in SWC species richness in another carnivorous gastropod—the “strombinid” columbellidae. We suggest that diversification of <i>Polystira</i> has been driven by intrinsic feeding-related specialization, whereas regionally the near-extinction of scavenging, non-specialized “strombinids” is a direct response to an extrinsic decline in seasonality and variation in food supply that supports trophic generalism.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Dissecting a marine snail species radiation (Conoidea: Turridae: <i>Polystira</i>) over 12 million years in the Southwestern Caribbean","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-31 01:31:36.210349","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2017-08-14","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000326555900008","VABBcode":null,"OpenAcc":0,"DOI":"10.5343/bms.2012.1083"},"refs":null,"anarec":{"AnaID":288068,"PubliDate":2013,"Pagination":"877-904","XtraPublOfAnaID":null,"ISBN":null,"Volume":"89","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42490,"SerRR":"Bulletin of Marine Science. University of Miami Press: Coral Gables.  ISSN 0007-4977; e-ISSN 1553-6955","StandardTitleSer":"Bulletin of Marine Science","ISSN":"0007-4977","AbbrevSer":"Bull. Mar. 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