INVESTIGADORES
MARVALDI Adriana
artículos
Título:
Larval morphology and biology of oxycorynine weevils, and the higher phylogeny of Belidae (Coleoptera, Curculionoidea)
Autor/es:
MARVALDI, A. E.
Revista:
Zoologica Scripta
Referencias:
Año: 2005 vol. 34 p. 37 - 48
ISSN:
0300-3256
Resumen:
Marvaldi, A. E. (2005). Larval morphology and biology of oxycorynine weevils, and the higher
phylogeny of Belidae (Coleoptera, Curculionoidea). Zoologica Scripta, 34, 3748.
ABSTRACT. Phylogenetic relationships among members of the family Belidae (Curculionoidea) were
reconstructed through cladistic analysis using 58 characters and 17 terminals. The characters
were from larval morphology (30), adult morphology (25) and biology regarding larval hostplants
and feeding habits (three). They were scored for exemplar taxa in 17 genera, representing
different belid subfamilies and tribes, plus two outgroup taxa in Megalopodidae and
Nemonychidae. The sampled genera included all those for which larval and adult information
is available, and two known only from adults. New information on the larvae and biology of
two oxycorynines is provided. These are the Chilean Oxycraspedus cribricollis, whose larvae live
in decayed female strobili of the gymnosperm Araucaria araucana, and Hydnorobius hydnorae
from Argentina, whose larvae, described and illustrated in the present paper, develop inside the
flower and fruit bodies of Prosopanche Americana (Hydnoraceae), a root-parasitic angiosperm.
The relationships proposed by the single optimal cladogram resulting from simultaneous
analysis of all taxa and characters are recovered by one of three optimal cladograms based on
the larval data set alone. The cladogram justifies a revised classification of Belidae in two sister
subfamilies: Belinae (with tribes Pachyurini, Agnesiotidini and Belini) and Oxycoryninae (with
tribes Oxycorynini and Aglycyderini). It summarizes larval and adult synapomorphies defining
the family Belidae, subfamilies and tribes. Based on the phylogenetic tree, the evolution of
biological traits is traced. Larval development in vegetative organs of conifers is ancestral in
Belidae. A shift to reproductive structures characterizes the Oxycorynini, a habit which was
conserved while several shifts to distantly related host-plant groups occurred.