Historical biogeography and distribution of the freshwater cyclopine copepods (Copepoda, Cyclopoida, Cyclopinae) of the Yucatan Peninsula, Mexico

Abstract

Aim To determine and analyse the distribution of the freshwater cyclopine copepod fauna of the Yucatan Peninsula (YP) and its relationship with the geological and climatic history of this Neotropical karstic zone.Location The Yucatan Peninsula, Mexico. Nearctic-derived (species of Acanthocyclops), Neotropical (i.e. M. edax, M. longisetus, A. panamensis, Thermocyclops inversus and T. tenuis), and epigean and hypogean endemic forms. The highly dynamic geomorphology of the YP and the recent climatic changes in the Holocene define the YP as a peculiar subregion that harbours a diverse fauna of cyclopine copepods with a high endemism. Main conclusionThe current distribution of cyclopine copepods reflects relatively recent, post-Pliocene biogeographical patterns; probably older patterns are involved as well. The eastern coast of the Yucatan is the most recently colonized by cyclopine copepods. Most of the genera are linked with South American forms, and the Nearctic influence is weakly represented. This group has no marine relatives, but there is evidence of vicariant events involving cavedwelling forms.

Diversity and distribution of the free-living freshwater Cyclopoida (Copepoda: Crustacea) in the Neotropics

“…Seventeen species are present in the whole neotropical region, which represents 10.8% of the total species. The high number of endemic versus the low number of widely distributed species for Cyclopoid a has been found in all recent taxonomic studies such as Kiefer (1981); Van-de-Velde (1984); Reid (1989) and Karaytug (1999) and Suárez-Morales (2002);Suárez-Morales et al (2004). This fact has high evolutionary significance, because it shows that the speciation of Cyclopida is bigger than supposed some time ago.…”

“…Endemism in the neotropics should be much higher than recorded; nowadays endemism is directly linked to the amount of research carried out at a given site. Reid, (1987;1989;1991) for central Brazil, Holynska, 2000 for Australia andSuárez-Morales et al (2004) for the Yucatán Peninsula (Mexico), Silva and Mastsumura-Tundisi (2005) for São Paulo State (Brazil) give examples of endemism and discuss its relationship with research.…”

“…Cyclopoida studies in the neotropical region are scarce and in all revisions genera new species have been added to the region lists (Gutierrez-Aguirre and Suárez-Morales, 2001;Suárez-Morales, et al, 2004;Silva and Matsumura-Tundisi, 2005). Revisions on the distribu-do Sul, Mato Grosso do Sul State) and the Biota data bank (www.biota.org.br).…”

Diversidad Y Abundancia De Comunidades Zooplanctonicas Litorales Del Humedal Pantanos De Villa, Lima, Peru

“…Los principales grupos componentes de las comunidades zooplantónicas son los protozoos, rotíferos y crustáceos, particularmente copépodos y cladóceros. Sin embargo, el zooplancton dulceacuícola, especialmente en las regiones tropicales, puede contener una amplia diversidad de categorías taxonómicas (Santos-Wisniewski et al 2002, Aoyagui et al 2003, Suárez-Morales et al 2004. A la fecha, en los Pantanos de Villa, no se ha evaluado la comunidad zooplanctónica representativa de este humedal, ni se ha empleado índices de diversidad alfa comparativamente.…”

Mesocyclops ogunnus Onabamiro 1957 (Crustacea: Copepoda: Cyclopoida): First report for northeastern Brazil

“…Mouelhi et al (2000) cited records of this species in Asia in: Israel, Bangladesh, Uzbekistan, Laos, Sri Lanka, Philippines, Vietnam and China. It also has been reported in the Americas in Florida (Hribar and Reid 2008), Central America (Suárez- Morales et al 2004), and Brazil (Reid and Pinto-Coelho 1994).…”