Vol. 54, 2015
Cladistic reanalysis and historical biogeography of the genus
Lycinus Thorell, 1894
(Araneae: Mygalomorphae: Nemesiidae) with description of two new
species from western Argentina
Estudios Parasitológicos y de Vectores CEPAVE (CCT-CONICET-La Plata),
Calle 2 N°584, La Plata B1902CHX, Argentina
Background: The genus Lycinus
includes ten species, one from Argentina, eight from Chile, and one
from Brazil. Two new species from western Argentina are described, and
some data on natural history are presented. A cladistic reanalysis with
the newly described species is carried out, and a reconstruction of
ancestral areas and primary Brooks Parsimony Analysis are performed.
The origins of the main groups of Lycinus
are also discussed in that light.
lagigliai sp. nov. and Lycinus
nevadoensis sp. nov. are described. The distribution of these
species comprised western Argentina at Mendoza province. The cladistic
reanalysis showed Lycinus as
monophyleticsupported only by the synapomorphy of dorsal spines on male
palpal tibia. The tree topology was as follows: (Lycinus epipiptus, Lycinus domeyko ((Lycinus longipes, L. nevadoensis sp. nov.) (Lycinus portoseguro, L. lagigliai sp. nov.)) (Lycinus caldera (Lycinus gajardoi, Lycinus choros)) (Lycinus tofo, Lycinus quilicura)). The
biogeographical analysis showed a close relationship of the species
from the Andean region and the South American Transition Zone. The
reconstruction of ancestral areas recognized four vicariant nodes.
Conclusions: A hitherto two unknown
Lycinus species are
recognized and formally described, along with a cladistic reanalysis
and historical biogeographical hypotheses.
Andean; Mendoza; Spiders; Phylogeny; Taxonomy.
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