{"refrec":{"BRefID":221294,"RR":"<b>Ditty, J.G.; Salas, J.A.</b> (2012). Misidentification of mysis stages of <i>Xiphopenaeus kroyeri</i> (Heller, 1862) and <i>Rimapenaeus</i> Pérez-Farfante and Kensley, 1997 (Decapoda: Penaeidae) in the Western Atlantic. <i>J. Crust. Biol. 32(6)</i>: 931-939. <a href=\"http://dx.doi.org/10.1163/1937240X-00002097\" target=\"_blank\">http://dx.doi.org/10.1163/1937240X-00002097</a>","BEntID":213024,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Crust. Biol. 32(6)</i>: 931-939. <a href=\"http://dx.doi.org/10.1163/1937240X-00002097\" target=\"_blank\">http://dx.doi.org/10.1163/1937240X-00002097</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ditty, J.G.; Salas, J.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ditty, J.G.; Salas, J.A.","Englishabstract":"Studies in the western Atlantic have relied primarily on the key of Cook (1966) to identify and discriminate early life stages (ELS) of <i>Xiphopenaeus kroyeri</i> (Heller, 1862) and <i>Rimapenaeus</i> spp. Pérez-Farfante and Kensley, 1997, even though larvae had not been reared successfully past the zoea phase at that time. We surveyed the penaeid literature for descriptions of reared mysis stages of <i>X. kroyeri</i> and <i>Rimapenaeus</i>, compared characters with those of Cook (1966), and found that Cook had reversed illustrations and criteria to discriminate taxa. We also examined plankton-collected mysis stages and identified new characters and previously unrecognized differences between taxa. Mysis stages of <i>X. kroyeri</i> have a slender median spine laterally near the posterior margin of pleomere five, not those of <i>Rimapenaeus</i>, although some early first myses of <i>Rimapenaeus</i> may have a vestigial spine laterally on pleomere five. <i>Rimapenaeus</i> has single dorsomedian spines on pleomeres four through six with the spine on pleomeres five and six >40% (usually about 50%) of fifth pleomere length as measured along the dorsal midline. <i>Rimapenaeus</i> lacks a pterygiostomial spine, although a spine on the distal margin of the developing antennal peduncle near the ventrolateral border of the carapace can be confused with a pterygiostomial spine. <i>Xiphopenaeus kroyeri</i> has a pterygiostomial spine and single dorsomedian spines on pleomeres four through six with the spine on pleomeres five and six <35% (usually about 25%) of fifth pleomere length. <i>Xiphopenaeus kroyeri</i> also has a gap about the width of one spine between the longest and adjacent outer pairs of furcal spines along the posterior margin of the telson, whereas <i>Rimapenaeus</i> has contiguous furcal spines. Differences in spine length dorsally on pleomeres five and six, and the presence or absence of a pterygiostomial spine should be used to discriminate taxa because the low hepatic spine and median spine laterally on pleomere five can be difficult to detect in <i>X. kroyeri</i>, even with a biological stain applied. Likely misidentification of mysis stages and possible overexploitation of <i>X. kroyeri</i> and <i>Rimapenaeus</i> spp. stocks in the western Atlantic emphasizes the need to re-assess information on ELS and the necessity of accurate identifications.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Misidentification of mysis stages of <i>Xiphopenaeus kroyeri</i> (Heller, 1862) and <i>Rimapenaeus</i> Pérez-Farfante and Kensley, 1997 (Decapoda: Penaeidae) in the Western Atlantic","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-30 01:31:17.548445","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Dorsomedian carina; Vestigial character","OtherDescriptors":null,"Notes":null,"AnaPub":2012,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2012-12-14","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000310256000006","VABBcode":null,"OpenAcc":0,"DOI":"10.1163/1937240X-00002097"},"refs":null,"anarec":{"AnaID":221294,"PubliDate":2012,"Pagination":"931-939","XtraPublOfAnaID":null,"ISBN":null,"Volume":"32","Issue":"6","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43037,"SerRR":"Journal of Crustacean Biology. 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