INVESTIGADORES
ROIG Sergio Alberto
artículos
Título:
Taxonomic revision and preliminary phylogenetic analysis of the subgenus Megalostomis (Scaphigenia) Lacordaire (Coleoptera: Chrysomelidae)
Autor/es:
AGRAIN, F.; ROIG JUÑENT, SERGIO; M.C. DOMÍNGUEZ
Revista:
Insect Systematic and Evolution
Editorial:
Brill, Leiden, The Netherlands
Referencias:
Lugar: Copenhagen; Año: 2007 vol. 38 p. 335 - 359
ISSN:
1399-560x
Resumen:
South America. A systematic revision of this subgenus is presented, including re-descriptions
and an update of distribution data of the six species. A preliminary cladistic analysis is performed
to test the relationships among the species of the subgenus and if the morphological
characters used are suitable. A key is presented to separate the seven subgenera of MegalostomisMegalostomis
Chevrolat as well as a key for the species of the subgenus M. (Scaphigenia). Male
aedeagus internal sac of the nine studied taxa are described and illustrated. This constitutes the
first internal sac descriptions for members of this subtribe and could help clarify the homology
of such structures within Cryptocephalinae. M. (S) consimilis Achard is reassigned to the
species status on the base of genitalic characters. The cladistic analysis was done using fortyone
characters from adult external morphology and male and female genitalia. Two species of
two different subgenera of Megalostomis: M. (Megalostomis), and M. (Heterostomis)M. (Scaphigenia). Male
aedeagus internal sac of the nine studied taxa are described and illustrated. This constitutes the
first internal sac descriptions for members of this subtribe and could help clarify the homology
of such structures within Cryptocephalinae. M. (S) consimilis Achard is reassigned to the
species status on the base of genitalic characters. The cladistic analysis was done using fortyone
characters from adult external morphology and male and female genitalia. Two species of
two different subgenera of Megalostomis: M. (Megalostomis), and M. (Heterostomis)M. (S) consimilis Achard is reassigned to the
species status on the base of genitalic characters. The cladistic analysis was done using fortyone
characters from adult external morphology and male and female genitalia. Two species of
two different subgenera of Megalostomis: M. (Megalostomis), and M. (Heterostomis)Megalostomis: M. (Megalostomis), and M. (Heterostomis)
Lacordaire, and one representative of the genus Themesia Lacordaire were selected as out
groups. Results were obtained by implicit enumeration using parsimony software. Three
equally parsimonious trees were obtained of 45 steps, Ri=0.952, and Ci= 0.941. Support of
each group was evaluated by Jacknifing, Bootstrap and Bremer values. Relationships between
species are discusseThemesia Lacordaire were selected as out
groups. Results were obtained by implicit enumeration using parsimony software. Three
equally parsimonious trees were obtained of 45 steps, Ri=0.952, and Ci= 0.941. Support of
each group was evaluated by Jacknifing, Bootstrap and Bremer values. Relationships between
species are discusse
