Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda: arastacidae) revealed by mitochondrial 16S rDNA sequences

M Schultz; S Smith; A Richardson; P Horwitz; K Crandall; Chris Austin

Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda: arastacidae) revealed by mitochondrial 16S rDNA sequences

M Schultz, S Smith, A Richardson, P Horwitz, K Crandall, Chris Austin

Research output: Contribution to journal › Article › peer-review

Abstract

Nucleotide sequence data from the mitochondrial 16S rDNA region were utilised to investigate phylogenetic relationships and species boundaries among Australian freshwater crayfish belonging to the genera Engaeus Erichson, 1846, Geocharax Clark, 1936 and Gramastacus Riek, 1972. Geocharax and Gramastacus were found to be monophyletic genera but one species currently assigned to Engaeus may belong to another genus. Relationships between the three existing genera were not resolved. Analysis of species boundaries within Geocharax suggests that there are an additional two species in this genus, and our analysis of Gramastacus indicates that undescribed populations from central New South Wales may comprise a second species. The data provide at least one instance of a taxon crossing the Great Dividing Range and provide confirmation of previously proposed hypotheses seeking to explain trans-Bass Strait distributions of species. � CSIRO 2007.

Original language	English
Pages (from-to)	569-587
Number of pages	19
Journal	Invertebrate Systematics
Volume	21
Issue number	6
Publication status	Published - 2007

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@article{60318e7830154b81a4220a1bc3551002,

title = "Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda: arastacidae) revealed by mitochondrial 16S rDNA sequences",

abstract = "Nucleotide sequence data from the mitochondrial 16S rDNA region were utilised to investigate phylogenetic relationships and species boundaries among Australian freshwater crayfish belonging to the genera Engaeus Erichson, 1846, Geocharax Clark, 1936 and Gramastacus Riek, 1972. Geocharax and Gramastacus were found to be monophyletic genera but one species currently assigned to Engaeus may belong to another genus. Relationships between the three existing genera were not resolved. Analysis of species boundaries within Geocharax suggests that there are an additional two species in this genus, and our analysis of Gramastacus indicates that undescribed populations from central New South Wales may comprise a second species. The data provide at least one instance of a taxon crossing the Great Dividing Range and provide confirmation of previously proposed hypotheses seeking to explain trans-Bass Strait distributions of species. � CSIRO 2007.",

keywords = "crayfish, crypsis, genetic analysis, mitochondrial DNA, phylogeny, taxonomy, Australasia, Australia, Bass Strait, Tasmania, Victoria [Australia], Astacoidea, Engaeus, Geocharax, Gramastacus, Parastacidae, Tenuibranchiurus",

author = "M Schultz and S Smith and A Richardson and P Horwitz and K Crandall and Chris Austin",

year = "2007",

language = "English",

volume = "21",

pages = "569--587",

journal = "Invertebrate Systematics",

issn = "1445-5226",

publisher = "CSIRO Publishing",

number = "6",

}

TY - JOUR

T1 - Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda

T2 - arastacidae) revealed by mitochondrial 16S rDNA sequences

AU - Schultz, M

AU - Smith, S

AU - Richardson, A

AU - Horwitz, P

AU - Crandall, K

AU - Austin, Chris

PY - 2007

Y1 - 2007

N2 - Nucleotide sequence data from the mitochondrial 16S rDNA region were utilised to investigate phylogenetic relationships and species boundaries among Australian freshwater crayfish belonging to the genera Engaeus Erichson, 1846, Geocharax Clark, 1936 and Gramastacus Riek, 1972. Geocharax and Gramastacus were found to be monophyletic genera but one species currently assigned to Engaeus may belong to another genus. Relationships between the three existing genera were not resolved. Analysis of species boundaries within Geocharax suggests that there are an additional two species in this genus, and our analysis of Gramastacus indicates that undescribed populations from central New South Wales may comprise a second species. The data provide at least one instance of a taxon crossing the Great Dividing Range and provide confirmation of previously proposed hypotheses seeking to explain trans-Bass Strait distributions of species. � CSIRO 2007.

AB - Nucleotide sequence data from the mitochondrial 16S rDNA region were utilised to investigate phylogenetic relationships and species boundaries among Australian freshwater crayfish belonging to the genera Engaeus Erichson, 1846, Geocharax Clark, 1936 and Gramastacus Riek, 1972. Geocharax and Gramastacus were found to be monophyletic genera but one species currently assigned to Engaeus may belong to another genus. Relationships between the three existing genera were not resolved. Analysis of species boundaries within Geocharax suggests that there are an additional two species in this genus, and our analysis of Gramastacus indicates that undescribed populations from central New South Wales may comprise a second species. The data provide at least one instance of a taxon crossing the Great Dividing Range and provide confirmation of previously proposed hypotheses seeking to explain trans-Bass Strait distributions of species. � CSIRO 2007.

KW - crayfish

KW - crypsis

KW - genetic analysis

KW - mitochondrial DNA

KW - phylogeny

KW - taxonomy

KW - Australasia

KW - Australia

KW - Bass Strait

KW - Tasmania

KW - Victoria [Australia]

KW - Astacoidea

KW - Engaeus

KW - Geocharax

KW - Gramastacus

KW - Parastacidae

KW - Tenuibranchiurus

M3 - Article

SN - 1445-5226

VL - 21

SP - 569

EP - 587

JO - Invertebrate Systematics

JF - Invertebrate Systematics

IS - 6

ER -

Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda: arastacidae) revealed by mitochondrial 16S rDNA sequences

Abstract

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