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New species and records of the genus Aegla Leach, 1820 (Crustacea, Anomura, Aeglidae) from the West-Central region of Rio Grande do Sul, Brazil

Abstract

Aeglidae are anomuran freshwater "crabs" found only in southern South America. In Brazil, the greatest species diversity occurs in hydrographic basins of the state of Rio Grande do Sul. Two new species, Aegla georginae and Aegla ludwigi, are described from the Ibicuí and Ijuí Rivers, respectively (Uruguay River Basin). The new taxa can be distinguished from other Aegla species based on both morphological and molecular characters. The two new species have a very restricted distribution and are categorized as endangered (A. georginae) and critically endangered (A. ludwigi) using IUCN Red List criteria. We also summarize and present new records of the Aegla species occurring in the Uruguay River Basin.

Aeglidae; Aegla; Brazil; freshwater biodiversity; molecular systematics; taxonomy


  • Bond-Buckup, G. and Buckup, L. 1994. A família Aeglidae (Crustacea, Decapoda, Anomura). Arquivos de Zoologia, 32: 159-347.
  • Bond-Buckup, G.; Jara, C.G.; Pérez-Losada, M.; Buckup, L. and Crandall, K.A. 2008. Global diversity of crabs (Aeglidae: Anomura: Decapoda) in freshwater. Hydrobiologia, 595: 267-273.
  • Bond-Buckup, G.; Jara, C.G.; Buckup, L.; Pérez-Losada, M.; Crandall, K.A. and Santos, S. 2010. New species and new records of endemic freshwater crabs from the Atlantic forest in Southern Brazil (Anomura: Aeglidae). Journal of Crustacean Biology, 30: 495-502.
  • Crandall, K.A. and Fitzpatrick Jr., J.F. 1996. Crayfish molecular systematics: using a combination of procedures to estimate phylogeny. Systematics Biology, 45: 1-26.
  • Crandall, K.A; Fetzner Jr., W. J.; Jara, C.G. and Buckup, L. 2000. On the phylogenetic position of the South American crayfish genera (Decapoda: Parastacidae). Journal of Crustacean Biology, 20(3): 530-540.
  • Darriba, D.; Taboada, G.L.; Doallo, R. and Posada, D. 2012. jModelTest 2: more models, new heuristics and parallel computing. Nature Methods, 9: 772.
  • Dudgeon, D.; Arthington, A.H.; Gessner, M.O.; Kawabata, Z.I.; Knowler, D.J.; Leveque, C.; Naiman, R.J.; Prieur-Richard, A.H.; Soto, D.; Stiassny, M.L.J. and Sullivan, C.A. 2006. Freshwater biodiversity: importance, threats, status and conservation challenges. Biological Reviews, 81(2): 163-182.
  • Fundação SOS Mata Atlântica e Instituto de Pesquisas Espaciais. 2011. Atlas dos remanescentes florestais da Mata Atlântica, Período 2008-2010: São Paulo, 2011, http://mapas.sosma.org.br/
  • IUCN (International Union for Conservation of Nature). 2001. IUCN Red List Categories and Criteria, Version 3.1. IUCN, Gland, Switzerland.
  • Jara, C.G. 1992. Un nuevo género de Aeglidae (Crust.: Decap.:Anom.)? Archivos de Biología y Medicina Experimentales, 24: R-194.
  • McLaughlin, P. A., Lemaitre, R. and Sorhannus, U. 2007. Hermit crab phylogeny: A reappraisal and its "fall-out". Journal of Crustacean Biology, 27(1): 97-115.
  • McLaughlin, P.A.; Lemaitre, R. and Crandall, K.A. 2010. Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) part III – Aegloidea. The Raffles Bulletin of Zoology, Supplement 23: 131-137.
  • Pattengale, N.D.; Alipour, M.; Bininda-Emonds, O.R.P.; Moret, B.M.E. and Stamatakis, A. 2010. How many bootstraps replicates are necessary? Journal of Computational Biology, 17(3): 337-354.
  • Pérez-Losada, M., Jara, C.G.; Bond-Buckup, G.; Porter, M.L. and Crandall. K.A. 2002. Anomuran phylogenetic relationships: on the taxonomic positioning of Aeglidae freshwater crabs. Journal of Crustacean Biology, 22(3): 670-676.
  • Pérez-Losada, M.; Bond-Buckup, G.; Jara, C.G. and Crandall, K.A. 2004. Molecular systematics and biogreography of the southern South American freshwater "crabs" Aegla (Decapoda, Anomura, Aeglidae) using multiple heuristic tree search approaches. Systematic Biology, 53(5): 767-780.
  • Pérez-Losada, M.; Bond-Buckup, G.; Jara, C.G. and Crandall, K.A. 2009. Conservation assessment of southern South American freshwater ecoregions on the basis of the distribution and genetic diversity of crabs from the genus Aegla Conservation Biology, 23: 692-702.
  • Sala, O.E.; Chapin, F.S.; Armesto, J.J.; Berlow, R.; Bloomfield, J.; Dirzo, R.; Huber-Sanwald, E.; Huenneke, L.F.; Jackson, R.B.; Kinzig, A.; Leemans, R.; Lodge, D.; Mooney, H.A.; Oesterheld, M.; Poff, N.L.; Sykes, M.T.; Walker, B.H.; Walker, M. and Wall, D.H. 2000. Global biodiversity scenarios for the year 2100. Science, 287: 1770-1774.
  • Santos, S.; Bond-Buckup, G.; Pérez-Losada, M.; Bartholomei-Santos, M.L. and Buckup, L. 2009. Aegla manuinflata, a new species of freshwater anomuran (Decapoda: Anomura: Aeglidae). Zootaxa, 2088: 31-40.
  • Santos, S.; Bond-Buckup, G.; Pérez-Losada, M.; Jara, C.G.; Crandall, K.A. and Buckup, L. 2010. New records and description of a new species of Aeglidae (Crustacea: Anomura) from river basins in Southern Brazil. Nauplius, 18: 79-86.
  • Santos, S.; Bond-Buckup, G.; Buckup, L.; Pérez-Losada, M.; Finley, M. and Crandall, K.A. 2012. Three new species of Aegla (Anomura) freshwater crabs from the Upper Uruguay River hydrographic basin in Brazil. Journal of Crustacean Biology, 32(4): 529-540.
  • Stamatakis, A. 2006. RAxML-VI-HPC: Maximum Likelihood-based phylogenetic analyses with thousands of taxa and mixed models. Bioinformatics, 22: 2688-2690.
  • Stamatakis, A.; Hoover, P. and Rougemont, J. 2008. A rapid bootstrap algorithm for the RAxML Web-servers. Systematic Biology, 75(5): 758-771.
  • Tamura, K.; Peterson, D.; Peterson, N.; Stecher, G.; Nei, M. and Kumar, S. 2011. MEGA5: Molecular Evolutionary Genetics Analysis using Maximum Likelihood, Evolutionary Distance, and Maximum Parsimony Methods. Molecular Biology and Evolution, 28: 2731-2739.
  • WWF. 2012. Living Planet Report 2012. WWF International, Gland, Switzerland.
  • Yeo, D.C.; Ng, J.P.K.L.; Cumberlidge, N.; Magalhães, C.; Daniels, S.R. and Campos, M.R. 2006. A global assessment of freshwater crab diversity (Crustacea: Decapoda: Brachyura). Hydrobiologia, 595: 275-28

Publication Dates

  • Publication in this collection
    27 Jan 2015
  • Date of issue
    Dec 2013

History

  • Received
    18 Feb 2013
  • Accepted
    28 Oct 2013
Sociedade Brasileira de Carcinologia Instituto de Biociências, UNESP, Campus Botucatu, Rua Professor Doutor Antônio Celso Wagner Zanin, 250 , Botucatu, SP, 18618-689 - Botucatu - SP - Brazil
E-mail: editor.nauplius@gmail.com