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Citation for Study 11410

Citation title: "Hermit to king, or hermit to all: Multiple transitions to crab-like forms from hermit crab ancestors ".

Study name: "Hermit to king, or hermit to all: Multiple transitions to crab-like forms from hermit crab ancestors ".

This study is part of submission 11400 (Status: Published).

Citation

Tsang L., Chan T., Ahyong S., & Chu K. 2011. Hermit to king, or hermit to all: Multiple transitions to crab-like forms from hermit crab ancestors. Systematic Biology, .

Authors

• Tsang L. (submitter) 852-2609-6775
• Chan T.
• Ahyong S.
• Chu K.

Abstract

The Anomura presents the greatest degree of morphological disparity in the decapod Crustacea, with body forms ranging from the symmetrical and asymmetrical hermit crabs, to squat lobsters and king crabs. The phylogeny of the anomurans has been fraught with controversy. Recent debate has focused primarily on the phenomenon of carcinization, the evolution of crab-like form from a non-crab-like ancestor, focused chiefly on derivation of king crabs from asymmetrical hermit crabs ? the ?hermit to king? hypothesis. We show by phylogenetic analysis of five nuclear protein-coding gene sequences that hermit crabs have a single origin, but surprisingly, that almost all other major clades and body forms within the Anomura, are derived from within the hermit crabs. The crab-like form and squat lobster form have each evolved at least twice from separate symmetrical hermit crab ancestors. In each case, a carcinization trend can be posited via a transition series from the initial symmetrical, long-tailed hermit crab form, through the intermediate squat lobster or asymmetrical hermit crab form, to the final crab-like form. Adaptation to dextral shell habitation evolved at least twice, once in an exclusively deep-water clade and once in the common ancestor of all other asymmetrical hermit crabs (from which king crabs are derived). These remarkable cases of parallelism suggest considerable phenotypic flexibility within the hermit crab ground plan, with a general tendency towards carcinization. Rather than having a separate origin from other major clades, hermit crabs have given rise to most other major anomuran body types.

Keywords

Anomura, Decapoda, Paguroidea, phylogeny, carcinization, parallel evolution, data partition

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S11410
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref19628,
  	 author = {Ling Ming  Tsang and Tin-Yam  Chan and Shane  Ahyong and Ka Hou  Chu},
  	 title = {Hermit to king, or hermit to all: Multiple transitions to crab-like forms from hermit crab ancestors },
  	 year = {2011},
  	 keywords = {Anomura, Decapoda, Paguroidea, phylogeny, carcinization, parallel evolution, data partition },
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Systematic Biology},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {The Anomura presents the greatest degree of morphological disparity in the decapod Crustacea, with body forms ranging from the symmetrical and asymmetrical hermit crabs, to squat lobsters and king crabs. The phylogeny of the anomurans has been fraught with controversy. Recent debate has focused primarily on the phenomenon of carcinization, the evolution of crab-like form from a non-crab-like ancestor, focused chiefly on derivation of king crabs from asymmetrical hermit crabs ? the ?hermit to king? hypothesis. We show by phylogenetic analysis of five nuclear protein-coding gene sequences that hermit crabs have a single origin, but surprisingly, that almost all other major clades and body forms within the Anomura, are derived from within the hermit crabs. The crab-like form and squat lobster form have each evolved at least twice from separate symmetrical hermit crab ancestors. In each case, a carcinization trend can be posited via a transition series from the initial symmetrical, long-tailed hermit crab form, through the intermediate squat lobster or asymmetrical hermit crab form, to the final crab-like form. Adaptation to dextral shell habitation evolved at least twice, once in an exclusively deep-water clade and once in the common ancestor of all other asymmetrical hermit crabs (from which king crabs are derived). These remarkable cases of parallelism suggest considerable phenotypic flexibility within the hermit crab ground plan, with a general tendency towards carcinization. Rather than having a separate origin from other major clades, hermit crabs have given rise to most other major anomuran body types.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 19628
  AU  - Tsang,Ling Ming 
  AU  - Chan,Tin-Yam 
  AU  - Ahyong,Shane 
  AU  - Chu,Ka Hou 
  T1  - Hermit to king, or hermit to all: Multiple transitions to crab-like forms from hermit crab ancestors 
  PY  - 2011
  KW  - Anomura
  KW  - Decapoda
  KW  - Paguroidea
  KW  - phylogeny
  KW  - carcinization
  KW  - parallel evolution
  KW  - data partition 
  UR  - http://dx.doi.org/
  N2  - The Anomura presents the greatest degree of morphological disparity in the decapod Crustacea, with body forms ranging from the symmetrical and asymmetrical hermit crabs, to squat lobsters and king crabs. The phylogeny of the anomurans has been fraught with controversy. Recent debate has focused primarily on the phenomenon of carcinization, the evolution of crab-like form from a non-crab-like ancestor, focused chiefly on derivation of king crabs from asymmetrical hermit crabs ? the ?hermit to king? hypothesis. We show by phylogenetic analysis of five nuclear protein-coding gene sequences that hermit crabs have a single origin, but surprisingly, that almost all other major clades and body forms within the Anomura, are derived from within the hermit crabs. The crab-like form and squat lobster form have each evolved at least twice from separate symmetrical hermit crab ancestors. In each case, a carcinization trend can be posited via a transition series from the initial symmetrical, long-tailed hermit crab form, through the intermediate squat lobster or asymmetrical hermit crab form, to the final crab-like form. Adaptation to dextral shell habitation evolved at least twice, once in an exclusively deep-water clade and once in the common ancestor of all other asymmetrical hermit crabs (from which king crabs are derived). These remarkable cases of parallelism suggest considerable phenotypic flexibility within the hermit crab ground plan, with a general tendency towards carcinization. Rather than having a separate origin from other major clades, hermit crabs have given rise to most other major anomuran body types.
  L3  - 
  JF  - Systematic Biology
  VL  - 
  IS  - 
  ER  -