References
- Apakupakul K, Siddall ME, Burreson EM. 1999. Higher level relationships of leeches (Annelida: Clitellata: Euhirudinea) based on morphology and gene sequences. Mol Phylogenet Evol. 12:350–359.
- Bely AE, Weisblat DA. 2006. Lessons from leeches: A call for DNA barcoding in the lab. Evol Dev. 8:491–501.
- Borda E, Siddall ME. 2004. Arhynchobdellida (Annelida: Oligochaeta: Hirudinida): Phylogenetic relationships and evolution. Mol Phylogenet Evol. 30:213–225.
- Edgar RC. 2004. MUSCLE: Multiple sequence alignment with high accuracy and high throughput. Nucl Acids Res. 32:1792–1797.
- Hebert PDN, Penton EH, Burns JM, Janzen DH, Hallwachs W. 2004. Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly Astraptes fulgerator. Proc Natl Acad Sci USA. 101:14812–14817.
- Kimura M. 1980. A simple method for estimating evolutionary rate of base substitutions through comparative studies of nucleotide sequences. J Mol Evol. 16:111–120.
- Klemm DJ. 1972. Freshwater leeches (Annelida: Hirudinea) of North America . In :Biota of freshwater ecosystems, identification manual 8. Washington, DC: Environmental Protection Agency. p 53.
- Klemm DJ. 1982. The leeches (Annelida: Hirudinea) of North America. Cincinnati, OH: 172 pp Aquatic Biology Section, Environmental Monitoring and Support Laboratory, Office of Research and Development, US Environmental Protection Agency.
- Lai YT, Chang CH, Chen JH. 2009. Two new species of Helobdella Blanchard 1896 (Hirudinida: Rhynchobdellida: Glossiphoniidae) from Taiwan, with a checklist of hirudinea fauna of the island. Zootaxa. 2068:27–46.
- Madill J, Hovingh P. 2007. Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: Check-list, new records, new pigmentation forms, and Pleistocene refugia. Zootaxa. 1657:1–21.
- Oceguera-Figueroa A. 2007. Especie nueva del género Helobdella (Rhynchobdellida: Glossiphoniidae) del lago de Catemaco, Veracruz, México. Acta Zool Mex (nueva serie). 23:15–22.
- Oceguera-Figueroa A, León-Règagnon V. 2005. A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico. Zootaxa. 976:1–8.
- Oceguera-Figueroa A, Kvist S, Watson S, Sankar DF, Overstreet RM, Siddall ME. Leech collections from Washington State, USA with the description of two new species of Placobdella (Annelida: Glossiphoniidae). Am Mus Novit. in press In press.
- Ringuelet RA. 1943. Sobre la morfología y variabilidad de Helobdella triserialis (Em. Bl) (Hirudinea, Glossiphoniidae). Notas Mus Plata. 8:215–240.
- Ringuelet RA. 1981. Clave para el reconocimiento de los hirudíneos de México. An Inst Biol Univ Nac Autón Méx Ser Zool. 52:89–97.
- Ringuelet RA. 1985. Fauna de agua dulce de la República de Argentina, Hirudinea. Buenos Aires: FECIC. p 321.
- Sarkar IN, Planet PJ, Bael TE, Stanley SE, Siddall M, DeSalle R, Figurski DH. Characteristic attributes in cancer microarrays. J Biomed Inform. 2002a; 35:111–122.
- Sarkar IN, Thornton JW, Planet PJ, Figurski DH, Schierwater B, DeSalle R. An automated phylogenetic key for classifying homeoboxes. Mol Phylogenet Evol. 2002b; 24:388–399.
- Sawyer RT. 1986. Leech biology and behavior. Oxford: Clarendon Press. p 1065.
- Siddall ME, Borda E. 2003. Phylogeny and revision of the leech genus Helobdella (Glossiphoniidae) based on mitochondrial gene sequences and morphological data and a special consideration of the triserialis complex. Zool Scr. 32:23–33.
- Siddall ME, Budinoff RB. 2005. DNA-barcoding evidence for widespread introductions of a leech from the South American Helobdella triserialis complex. Conserv Genet. 6:467–472.
- Siddall ME, Budinoff RB, Borda E. 2005. Phylogenetic evaluation of the systematics and biogeography of the leech family Glossiphoniidae. Invert Syst. 19:105–112.
- Suarez AV, Tsutsui ND. 2008. The evolutionary consequences of biological invasions. Mol Ecol. 17:351–360.
- Swofford DL. 2002. PAUP* phylogenetic analysis using parsimony (*and other methods), Ver. 4.0b10. Sunderland, MA: Sinauer Associates.
- Tsutsui ND, Suarez AV, Holway DA, Case TJ. 2000. Reduced genetic variation and the success of an invasive species. Proc Natl Acad Sci USA. 97:5948–5953.
- Weisblat DA, Kuo DH. Helobdella (leech): A model for developmental studies. Cold Spring Harb Protoc. 2009 pdb.emo121.