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Titolo:
Evidence for three major clades within the snapping shrimp genus Alpheus inferred from nuclear and mitochondrial gene sequence data
Autore:
Williams, ST; Knowlton, N; Weigt, LA; Jara, JA;
Indirizzi:
Smithsonian Trop Res Inst, Naos Marine Lab, Unit 0948, APO, AA 34002 USA Smithsonian Trop Res Inst APO AA USA 34002 , Unit 0948, APO, AA 34002 USA Univ Calif San Diego, Scripps Inst Oceanog, Marine Biol Res Div 0202, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 v 0202, La Jolla, CA 92093 USA Field Museum Nat Hist, Chicago, IL 60605 USA Field Museum Nat Hist Chicago IL USA 60605 at Hist, Chicago, IL 60605 USA
Titolo Testata:
MOLECULAR PHYLOGENETICS AND EVOLUTION
fascicolo: 3, volume: 20, anno: 2001,
pagine: 375 - 389
SICI:
1055-7903(200109)20:3<375:EFTMCW>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUTOCRINE MOTILITY FACTOR; ELONGATION FACTOR-1-ALPHA; GLUCOSE-6-PHOSPHATE ISOMERASE; PHOSPHOGLUCOSE ISOMERASE; PHOSPHOHEXOSE ISOMERASE; MOLECULAR PHYLOGENY; DNA; NEUROLEUKIN; PENAEUS; POLYPEPTIDE;
Keywords:
Alpheus; Thunor; glucose phosphate isomerase; elongation factor-1 alpha; cytochrome oxidase I; phylogeny; chimera; selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Williams, ST Nat Hist Museum, Dept Zool, Cromwell Rd, London SW7 5BD, England Nat Hist Museum Cromwell Rd London England SW7 5BD , England
Citazione:
S.T. Williams et al., "Evidence for three major clades within the snapping shrimp genus Alpheus inferred from nuclear and mitochondrial gene sequence data", MOL PHYL EV, 20(3), 2001, pp. 375-389

Abstract

The snapping shrimp genus Alpheus is among the most diverse of caridean shrimps, and analyses of taxa separated by the Isthmus of Panama have been used to estimate rates of molecular evolution. Although seven morphological groups have been informally suggested, no formal phylogenetic analysis of the genus has been previously attempted. Here we infer the phylogenetic relationships within Alpheus using sequence data from two nuclear genes, glucose-6-phosphate isomerase and elongation factor-la, and from the mitochondrialgene cytochrome oxidase I. Three major clades corresponding to previously noted morphological features were identified. Discrepancies between earlierinformal morphological groupings and molecular analyses largely consisted of species whose morphologies were not entirely typical of the group to which they had been assigned. The traditional placements of shrimp with highlysessile lifestyles and consequently simplified morphologies were also not supported by molecular analyses. Phylogenies for Alpheus suggest that specialized ecological requirements (e.g., symbiotic associations and estuarine habitats) and modified claw morphologies have evolved independently severaltimes. These new analyses also support the sister species status of transisthmian pairs analyzed previously, although very similar pairs were not always resolved with the more slowly evolving nuclear loci. In addition, six new cryptic species were identified in the course of these studies plus a seventh whose status remains to be determined. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 06:19:33