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HUBER AUGUSTOFREDERICO, ARAUJO PAULABEATRIZ, RIBEIRO FELIPEBEZERRA. The hole is deeper: description of two new species within the Parastacus brasiliensis (von Martens, 1869) species complex with an integrative taxonomy approach. Zootaxa 2022; 5168:251-284. [DOI: 10.11646/zootaxa.5168.3.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/04/2022]
Abstract
In this contribution, we describe two new species of burrowing crayfish species complex Parastacus brasiliensis from forestry areas in the central region of the state of Rio Grande do Sul, southern Brazil. We used an integrative taxonomy approach with morphology and the mitochondrial DNA 16S rRNA gene and also evaluated their conservation status according to the IUCN Red List Criteria. Parastacus guapo sp. nov. was collected near the municipality of Pantano Grande and it differs from all other congeneric species in having an epistome anterolateral section with a large conical projection ending in a big sharp spine on both sides. It also differs from P. brasiliensis sensu stricto in the shape of the rostral surface, sub-orbital angle, postorbital carina straight, sub-orbital angle > 90°, postorbital carinae prominent in anterior and middle portions, carpal spine present, the internal surface of chelipeds palm with sparse tubercules, areola narrow and pleon short. Parastacus gomesae sp. nov. was collected in the municipality of São Jerônimo, it differs from all analysed species for rostral spine absent, epistome anteromedian lobe heptagonal and mandible incisive process with seven teeth (the second tooth from the anterior margin is the largest). It is also distinguished of P. brasiliensis sensu stricto in the sub-orbital angle > 90°, postorbital carinae prominent in anterior and middle portions, 3–4 rows of verrucose tubercles irregularly distributed on the palm dorsal surface of chelipeds, areola narrow and pleon short. Phylogenetic relationships confirmed the distinct position of these new species to the already described species. The extent of occurrence (EOO) / area of occurrence (AOO) of P. guapo sp. nov and P. gomesae sp. nov. were estimated at 937 km² / 1,87 km², and 2.107 km² / 23,9 km² respectively. The main threats identified were continued decline in the quality of habitats, resulting from deforestation and forestry areas. However, as we know only one point of occurrence for each new species, we suggest that both be categorized as Data Deficient.
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Sibraa L, Barton D, Shamsi S. Occurrence of Temnocephalidae flatworms in Australia. J NAT HIST 2022. [DOI: 10.1080/00222933.2022.2033869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Lachlan Sibraa
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, Australia
| | - Diane Barton
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, Australia
| | - Shokoofeh Shamsi
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, Australia
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Mutton TY, Phillips MJ, Fuller SJ, Bryant LM, Baker AM. Systematics, biogeography and ancestral state of the Australian marsupial genus Antechinus (Dasyuromorphia: Dasyuridae). Zool J Linn Soc 2019. [DOI: 10.1093/zoolinnean/zly062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Thomas Y Mutton
- Earth, Environmental and Biological Sciences School, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Matthew J Phillips
- Earth, Environmental and Biological Sciences School, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Susan J Fuller
- Earth, Environmental and Biological Sciences School, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Litticia M Bryant
- Earth, Environmental and Biological Sciences School, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Andrew M Baker
- Earth, Environmental and Biological Sciences School, Queensland University of Technology, Brisbane, Queensland, Australia
- Natural Environments Program, Queensland Museum, South Brisbane, Australia
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Miranda I, Gomes KM, Ribeiro FB, Araujo PB, Souty-Grosset C, Schubart CD. Molecular systematics reveals multiple lineages and cryptic speciation in the freshwater crayfish Parastacus brasiliensis (von Martens, 1869) (Crustacea : Decapoda : Parastacidae). INVERTEBR SYST 2018. [DOI: 10.1071/is18012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The characterisation of intraspecific genetic diversity in representatives of the South American crayfish genus Parastacus Huxley, 1879 is here carried out for the first time by comparing populations of Parastacus brasiliensis (von Martens, 1869) as currently defined. Phylogenetic reconstructions based on mitochondrial and nuclear markers indicate the existence of multiple lineages, of which only one can be considered as P. brasiliensis sensu stricto. In addition, there are seven other lineages, one of which is the subspecies Parastacus brasiliensis promatensis Fontoura & Conter, 2008, which is here elevated to species level. We thereby increase to 14 the number of recognised species within Parastacus in South America. Genetic distances among P. brasiliensis sensu stricto and the lineages ‘A’, ‘B’ and ‘C’ increase with geographical distances, suggesting isolation by distance as an important driver of diversification, and eventually speciation, in these burrowing crayfishes. Parastacus brasiliensis occurs mainly in the Guaíba Lake basin and studied populations show limited connectivity and gene flow, probably due to habitat fragmentation. On the basis of genetic and distribution data, the conservation status of P. brasiliensis sensu stricto is confirmed as Near Threatened (NT). These findings lead us to encourage the establishment of preservation areas for isolated populations. The importance of preserving the newly recognised distinct gene pools in order to maintain overall genetic diversity is emphasised.
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Dawkins KL, Furse JM, Wild CH, Hughes JM. A novel genus and cryptic species harboured within the monotypic freshwater crayfish genus Tenuibranchiurus Riek, 1951 (Decapoda: Parastacidae). PeerJ 2017; 5:e3310. [PMID: 28560095 PMCID: PMC5445942 DOI: 10.7717/peerj.3310] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 04/13/2017] [Indexed: 11/20/2022] Open
Abstract
Identifying species groups is an important yet difficult task, with there being no single accepted definition as to what constitutes a species, nor a set of criteria by which they should be delineated. Employing the General Lineage Concept somewhat circumvents these issues, as this concept allows multiple concordant lines of evidence to be used as support for species delimitation, where a species is defined as any independently evolving lineage. Genetically diverse groups have previously been identified within the monotypic parastacid genus Tenuibranchiurus Riek, 1951, but no further investigation of this diversity has previously been undertaken. Analysis of two mitochondrial DNA gene regions has previously identified two highly divergent groups within this taxon, representing populations from Queensland (Qld) and New South Wales (NSW), respectively. Additional testing within this study of both mitochondrial and nuclear DNA through species discovery analyses identified genetically diverse groups within these regions, which were further supported by lineage validation methods. The degree of genetic differentiation between Qld and NSW populations supports the recognition of two genera; with Qld retaining the original genus name Tenuibranchiurus, and NSW designated as Gen. nov. until a formal description is completed. Concordance between the species discovery and lineage validation methods supports the presence of six species within Tenuibranchiurus and two within Gen. nov. The recognition of additional species removes the monotypy of the genus, and the methods used can improve species identification within groups of organisms with taxonomic problems and cryptic diversity.
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Affiliation(s)
- Kathryn L Dawkins
- Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
| | - James M Furse
- Environmental Futures Research Institute, Griffith University, Gold Coast, Queensland, Australia.,Miyazaki International College, Miyazaki, Japan
| | - Clyde H Wild
- Environmental Futures Research Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Jane M Hughes
- Australian Rivers Institute, Griffith University, Nathan, Queensland, Australia
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MitoPhAST, a new automated mitogenomic phylogeny tool in the post-genomic era with a case study of 89 decapod mitogenomes including eight new freshwater crayfish mitogenomes. Mol Phylogenet Evol 2015; 85:180-8. [DOI: 10.1016/j.ympev.2015.02.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 12/20/2014] [Accepted: 02/13/2015] [Indexed: 11/22/2022]
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Gan HM, Tan MH, Austin CM. The complete mitogenome of the Australian spiny crayfish Euastacus yarraensis (McCoy, 1888) (Crustacea: Decapoda: Parastacidae). Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:929-30. [PMID: 24938115 DOI: 10.3109/19401736.2014.926490] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The mitochondrial genome sequence of the Australian crayfish, Euastacus yarraensis, is documented and compared with other Australian crayfish genera. Euastacus yarraensis has a mitogenome of 15,548 base pairs consisting of 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs, and a non-coding AT-rich region. The base composition of E. yarraensis mitogenome is 32.39% for T, 22.45% for C, 34.43% for A, and 10.73% for G, with an AT bias of 66.82%. The mitogenome gene order conforms to what is considered the primitive arrangement for parastacid crayfish.
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Affiliation(s)
- Han Ming Gan
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Petaling Jaya , Selangor , Malaysia
| | - Mun Hua Tan
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Petaling Jaya , Selangor , Malaysia
| | - Christopher M Austin
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Petaling Jaya , Selangor , Malaysia
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Gan HM, Tan MH, Gan HY, Lee YP, Schultz MB, Austin CM. The complete mitogenome of the Australian crayfish Geocharax gracilis Clark 1936 (Crustacea: Decapoda: Parastacidae). Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:826-7. [PMID: 24845437 DOI: 10.3109/19401736.2014.919460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The mitogenome of the black yabby, Geocharax gracilis, was sequenced using the MiSeq Personal Sequencer. It has 15,924 base pairs consisting of 13 protein-coding genes, 2 ribosomal subunit genes, 23 transfer RNAs, and a non-coding AT-rich region. The base composition of G. gracilis mitogenome is 32.18% for T, 22.32% for C, 34.83% for A, and 10.68% for G, with an AT bias of 67.01%. The mitogenome gene order is typical for that of parastacid crayfish with the exception of some minor rearrangements involving tRNA genes.
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Affiliation(s)
- Han Ming Gan
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Selangor , Malaysia and
| | - Mun Hua Tan
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Selangor , Malaysia and
| | - Huan You Gan
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Selangor , Malaysia and
| | - Yin Peng Lee
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Selangor , Malaysia and
| | - Mark B Schultz
- b Faculty of Medical and Dental Health Sciences , The University of Melbourne, Bio21 Research Institute , Parkville , Victoria , Australia
| | - Christopher M Austin
- a School of Science, Monash University Malaysia, Jalan Lagoon Selatan , Bandar Sunway , Selangor , Malaysia and
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McCormack RB. The eastern swamp crayfish Gramastacus lacus sp. n. (Decapoda, Parastacidae) a new species of freshwater crayfish from coastal New South Wales, Australia. Zookeys 2014:53-67. [PMID: 24715801 PMCID: PMC3978226 DOI: 10.3897/zookeys.398.7544] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 03/20/2014] [Indexed: 11/21/2022] Open
Abstract
Gramastacus lacussp. n., is described from coastal lowlands of the Central and Mid North Coast regions of New South Wales, Australia. Gramastacus lacus has a restricted distribution in ephemeral habitats, being dependent on regular natural flooding and drying cycles, and burrows for survival during temporary dry cycles. Documented are population distributions in lowland habitats (3–48 m, a.s.l.) from Wamberal Lagoon, north along the coastal strip to Wallis Lake. The species is small, reaching a maximum weight of 7 grams and 21.3 mm OCL, and distinguished by a large male genital papilla, large raised post orbital ridges, laterally compressed carapace and elongated chelae.
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Affiliation(s)
- Robert B McCormack
- Australian Crayfish Project, c/-Australian Aquatic Biological Pty Ltd, P.O. Box 3, Karuah, NSW, 2324 Australia
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Chester ET, Matthews TG, Howson TJ, Johnston K, Mackie JK, Strachan SR, Robson BJ. Constraints upon the response of fish and crayfish to environmental flow releases in a regulated headwater stream network. PLoS One 2014; 9:e91925. [PMID: 24647407 PMCID: PMC3967696 DOI: 10.1371/journal.pone.0091925] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 02/11/2014] [Indexed: 11/18/2022] Open
Abstract
In dry climate zones, headwater streams are often regulated for water extraction causing intermittency in perennial streams and prolonged drying in intermittent streams. Regulation thereby reduces aquatic habitat downstream of weirs that also form barriers to migration by stream fauna. Environmental flow releases may restore streamflow in rivers, but are rarely applied to headwaters. We sampled fish and crayfish in four regulated headwater streams before and after the release of summer-autumn environmental flows, and in four nearby unregulated streams, to determine whether their abundances increased in response to flow releases. Historical data of fish and crayfish occurrence spanning a 30 year period was compared with contemporary data (electrofishing surveys, Victoria Range, Australia; summer 2008 to summer 2010) to assess the longer-term effects of regulation and drought. Although fish were recorded in regulated streams before 1996, they were not recorded in the present study upstream or downstream of weirs despite recent flow releases. Crayfish (Geocharax sp. nov. 1) remained in the regulated streams throughout the study, but did not become more abundant in response to flow releases. In contrast, native fish (Gadopsis marmoratus, Galaxias oliros, Galaxias maculatus) and crayfish remained present in unregulated streams, despite prolonged drought conditions during 2006-2010, and the assemblages of each of these streams remained essentially unchanged over the 30 year period. Flow release volumes may have been too small or have operated for an insufficient time to allow fish to recolonise regulated streams. Barriers to dispersal may also be preventing recolonisation. Indefinite continuation of annual flow releases, that prevent the unnatural cessation of flow caused by weirs, may eventually facilitate upstream movement of fish and crayfish in regulated channels; but other human-made dispersal barriers downstream need to be identified and ameliorated, to allow native fish to fulfil their life cycles in these headwater streams.
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Affiliation(s)
- Edwin T. Chester
- Environmental and Conservation Sciences, Murdoch University, Perth, Western Australia, Australia
| | - Ty G. Matthews
- School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia
| | - Travis J. Howson
- School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia
| | - Kerrylyn Johnston
- Marine and Freshwater Research Laboratory, Murdoch University, Perth, Western Australia, Australia
| | - Jonathon K. Mackie
- School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia
| | - Scott R. Strachan
- Environmental and Conservation Sciences, Murdoch University, Perth, Western Australia, Australia
| | - Belinda J. Robson
- Environmental and Conservation Sciences, Murdoch University, Perth, Western Australia, Australia
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Sherman CDH, Ierodiaconou D, Stanley AM, Weston K, Gardner MG, Schultz MB. Development of twenty-four novel microsatellite markers for the freshwater crayfish, Geocharax gracilis, using next generation sequencing. CONSERV GENET RESOUR 2011. [DOI: 10.1007/s12686-011-9590-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sinclair EA, Madsen A, Walsh T, Nelson J, Crandall KA. Cryptic genetic divergence in the giant Tasmanian freshwater crayfish Astacopsis gouldi (Decapoda: Parastacidae): implications for conservation. Anim Conserv 2010. [DOI: 10.1111/j.1469-1795.2010.00395.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Evolution underground: A molecular phylogenetic investigation of Australian burrowing freshwater crayfish (Decapoda: Parastacidae) with particular focus on Engaeus Erichson. Mol Phylogenet Evol 2009; 50:580-98. [DOI: 10.1016/j.ympev.2008.11.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Revised: 11/26/2008] [Accepted: 11/28/2008] [Indexed: 11/21/2022]
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SCHULTZ MARKB, IERODIACONOU DANIELA, SMITH SARAHA, HORWITZ PIERRE, RICHARDSON ALASTAIRMM, CRANDALL KEITHA, AUSTIN CHRISTOPHERM. Sea-level changes and palaeo-ranges: reconstruction of ancient shorelines and river drainages and the phylogeography of the Australian land crayfishEngaeus sericatusClark (Decapoda: Parastacidae). Mol Ecol 2008; 17:5291-314. [DOI: 10.1111/j.1365-294x.2008.03996.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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