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Spatial autocorrelation of morphometric variation in Lutosa Brasiliensis (Brunner von wattenwyl, 1888) (Orthoptera: Gryllacidoidea: Henicidae)

José Alexandre Felizola Diniz-Filho

Departamento de Biologia, Instituto de Biociências - UNESP, Caixa Postal 199,13506-900 Rio Claro, SP, Brasil

ABSTRACT

Geographic differentiation and sexual dimorphism in eighteen morphomctric characters of Lutosa brasiliensis (Orthoptera:Henicidae) collected in eight localities of the State of Sao Paulo (Brazil) were analysed. A two-way Multivariate Analysis of Variance (MONOVA) was used to assess simultaneously the effects of sex and geographic location (plus their interaction) on morphometric variability. The spatial patterns of variation were analysed by Factor and Spatial Autocorrelation Analyses (Moran's I coefficient in four distance classes). Both indicate that the main direction of variation is, for males and females, a north-south cline in overali body size. In females, however, ovipositor length is not correlated with overall body size and displays a different pattern of variation over geographic space, indicating that distinct evolutionary forces produced the geographic differentiation in the species.

Keywords: Morphometric variation; Lutosa Brasiliensis; Orthoptera.

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