The phylogenetic relationships of 14 species of Stilestrongylus were analyzed using the comparative morphology of 21 characters. We obtained 2 shortest trees of 50 steps, with a consistency index of 0.540 and 25 apomorphic character states. Ingroup monophyly was supported on these trees by 2 and 3 synapomorphies, respectively, and the ingroup was defined by the following characters: greater number of ventral ridges relative to the number of ridges dorsally, asymmetric bursa, and externodorsal rays differing in size. Sister-group relationships among Stilestrongylus and the other genera designated as outgroups are relatively consistent with those postulated by Durette-Desset's in a classification of the Nippostrongylinae. The ancestor of the species groups comprising Hassalstrongylus, Guerrerostrongylus, and Stilestrongylus originated and diversified in murids in the Neotropical region. Species of Hassalstrongylus occur in rodents between southeastern North America and the eastern part of South America (Brazil and Argentina), whereas species of Guerrerostrongylus and Stilestrongylus diversified exclusively in rodents in the Neotropics.
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December 2000
SYSTEMATICS-PHYLOGENETICS|
December 01 2000
PHYLOGENETIC RELATIONSHIPS AMONG SPECIES OF STILESTRONGYLUS FREITAS, LENT AND ALMEIDA, 1937 (TRICHOSTRONGYLOIDEA: HELIGMONELLIDAE: NIPPOSTRONGYLINAE), PARASITES OF MYOMORPH RODENTS (RODENTIA: MURIDAE) IN THE NEOTROPICS
Gerardo Pérez-Ponce de León;
Gerardo Pérez-Ponce de León
Laboratorio de Helmintología, Instituto de Biología, UNAM, C.P. 04510 México D.F., México
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Scott Lyell Gardner;
Scott Lyell Gardner
Laboratorio de Helmintología, Instituto de Biología, UNAM, C.P. 04510 México D.F., México
*Harold W. Manter Laboratory of Parasitology, University of Nebraska–Lincoln, W529 Nebraska Hall, Lincoln, Nebraska 68588-0514.
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Jorge Falcón-Ordáz
Jorge Falcón-Ordáz
Laboratorio de Helmintología, Instituto de Biología, UNAM, C.P. 04510 México D.F., México
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J Parasitol (2000) 86 (6): 1326–1335.
Citation
Gerardo Pérez-Ponce de León, Scott Lyell Gardner, Jorge Falcón-Ordáz; PHYLOGENETIC RELATIONSHIPS AMONG SPECIES OF STILESTRONGYLUS FREITAS, LENT AND ALMEIDA, 1937 (TRICHOSTRONGYLOIDEA: HELIGMONELLIDAE: NIPPOSTRONGYLINAE), PARASITES OF MYOMORPH RODENTS (RODENTIA: MURIDAE) IN THE NEOTROPICS. J Parasitol 1 December 2000; 86 (6): 1326–1335. doi: https://doi.org/10.1645/0022-3395(2000)086[1326:PRASOS]2.0.CO;2
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