PHYLOGENY OF SPECIES OF SCIADICLEITHRUM (MONOGENOIDEA: ANCYROCEPHALINAE), AND THEIR HISTORICAL BIOGEOGRAPHY IN THE NEOTROPICS

The phylogenetic relationships and historical biogeography of species of Sciadicleithrum parasitizing Neotropical cichlid fishes were studied. Hypotheses were: Did the presence of Sciadicleithrum species in southeast Mexico (SM) and Central America (CA) result from early dispersal of cichlid species...

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Bibliographic Details
Published in:The Journal of parasitology 2005-04, Vol.91 (2), p.253-259
Main Authors: Mendoza-Franco, Edgar F, Vidal-Martínez, Víctor M
Format: Article
Language:English
Subjects:
Ancyrocephalinae
Animals
Biogeography
Biological and medical sciences
Biological taxonomies
Central America
Cichlidae
Cichlidogyrus
Cichlids - parasitology
Dispersion
ECTOPARASITOLOGY
Ectoparasitoloy
Evolution
Fish Diseases - parasitology
Freshwater
Freshwater fishes
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Host alternation
Hypotheses
Invertebrates
Laboratories
Mating behavior
Mexico
Monogenoidea
Morphology
Museums
Ovaries
Parasite hosts
Parasites
Parasitism
Parasitology
Phylogenetics
Phylogeny
Platyhelminths - anatomy & histology
Platyhelminths - classification
Pleistocene
Rivers
South America
Speciation
Species
Testes
Trematode Infections - parasitology
Trematode Infections - veterinary
Tropical Climate
Vagina
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Summary:The phylogenetic relationships and historical biogeography of species of Sciadicleithrum parasitizing Neotropical cichlid fishes were studied. Hypotheses were: Did the presence of Sciadicleithrum species in southeast Mexico (SM) and Central America (CA) result from early dispersal of cichlid species from South America (SA) to the north via the Antilles during the Tertiary (24 million years ago [mya]), or did it occur after emergence of the Panama Isthmus in the Pleistocene (2–5 mya)? The Sciadicleithrum phylogeny was based on 19 morphological transformation series, with species of Gussevia and Cichlidogyrus as outgroups. The most parsimonious cladogram had a 40% consistency index, with one clade including all the species of Sciadicleithrum from SA and all but one of those from CA and another with all the Sciadicleithrum species from SM and S. maculicaudae from CA. Results support the late dispersal hypothesis following emergence of the Panama Isthmus. Fifteen species of Sciadicleithrum parasitize 13 cichlid species from SA and CA. In contrast, only 4 species of Sciadicleithrum infect 14 cichlid species from SM. Parasite speciation appears to lag behind host speciation, with 2 equally possible explanations: loss of parasite species and host switching.
ISSN:0022-3395
1937-2345
DOI:10.1645/GE-3389