Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae)
Por:
Pavon-Vazquez, Carlos J., Garcia-Vazquez, Uri O., Bryson, Jr., Robert W., Feria-Ortiz, Manuel, Manriquez-Moran, Norma L., Nieto-Montes de Oca, Adrian
Publicada:
1 dic 2018
Resumen:
Integrative taxonomy has been generally considered as a goal in
systematics for more than a decade. Here, we employed environmental,
molecular, and morphological data to evaluate the species boundaries
within the short-nosed skink Plestiodon brevirostris from south-central
Mexico, one member of the morphologically conservative P. brevirostris
group. Our molecular dataset includes one mitochondrial and two nuclear
loci. The mitochondrial fragment includes the full length of the gene
coding for the NADH dehydrogenase subunit 1 protein, a segment of the
gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear
dataset includes fragments of the genes coding for the megakaryoblastic
leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic
reconstruction, analyses of population structure and morphological
variation, and species delimitation methods (including the integration
of the three kinds of data in a unified probabilistic framework) to
evaluate species limits. Our results suggest that P. brevirostris
represents four distinct species. The information provided by each kind
of data allowed us to discern between alternative explanations for the
observed patterns of geographic structure. Two of the newly recognized
lineages are poorly differentiated morphologically but apparently differ
in environmental preferences and are allopatric. Additionally, one
lineage is microendemic and parapatric with respect to another one.
Moreover, our phylogenetic analyses suggest that other taxa within the
P. brevirostris group may represent species complexes. We discuss our
results in the context of integrative species delimitation.
Filiaciones:
Pavon-Vazquez, Carlos J.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Evolut, Lab Herpetol,Museo Zool, Ciudad Univ, Ciudad De Mexico 04510, Mexico
Univ Nacl Autonoma Mexico, Posgrad Ciencias Biol, Ciudad Univ, Ciudad De Mexico 04510, Mexico
Australian Natl Univ, Res Sch Biol, Div Ecol & Evolut, Canberra, ACT 2601, Australia
Garcia-Vazquez, Uri O.:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Batalla 5 Mayo S-N, Ciudad De Mexico 09230, Mexico
Feria-Ortiz, Manuel:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Batalla 5 Mayo S-N, Ciudad De Mexico 09230, Mexico
Manriquez-Moran, Norma L.:
Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Lab Sistemat Mol, Ciudad Del Conocimiento 42184, Hidalgo, Mexico
Nieto-Montes de Oca, Adrian:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Evolut, Lab Herpetol,Museo Zool, Ciudad Univ, Ciudad De Mexico 04510, Mexico
|