Resumo
Males of Euglossa mandibularis Friese, 1899 can be categorized by (1) presence or (2) absence of scutellar tuft (a morphological feature of dense setae found in females' scutellum of the genera Euglossa Latreille, 1802 and Eulaema Lepeletier, 1841). A multivariate statistical analysis using six morphological measures (hindtibia length and width, head width, intertegular span, midbasitarsus length and scape length) show that males of the categories 1 and 2 were significantly different in relation to such measures. The width head, hindtibia length and scape length were the measures that most influenced the observed differences. Levene test suggest there is not effect of stabilizing selection on males without scutellar tuft. Since there is a fluctuation in the proportion of males with scutellar tuft occurring in a single population, the observed morphological differences might be environmentally determined.
Apidae; Euglossini; Euglossa; male dimorphism
Apidae; Euglossini; Euglossa; male dimorphism
COMUNICAÇÃO CIENTÍFICA
Dimorfismo em machos de Euglossa mandibularis Friese (Apidae, Euglossina)
Male dimorphism in Euglossa mandibularis Friese (Apidae, Euglossina)
Rui Carlos Peruquetti
Laboratório de Genética Bioquímica, Departamento de Genética e Evolução, Universidade Federal de São Carlos. Caixa Postal 676, 13567-905 São Carlos, São Paulo, Brasil. E-mail: prcp@iris.ufscar.br
ABSTRACT
Males of Euglossa mandibularis Friese, 1899 can be categorized by (1) presence or (2) absence of scutellar tuft (a morphological feature of dense setae found in females' scutellum of the genera Euglossa Latreille, 1802 and Eulaema Lepeletier, 1841). A multivariate statistical analysis using six morphological measures (hindtibia length and width, head width, intertegular span, midbasitarsus length and scape length) show that males of the categories 1 and 2 were significantly different in relation to such measures. The width head, hindtibia length and scape length were the measures that most influenced the observed differences. Levene test suggest there is not effect of stabilizing selection on males without scutellar tuft. Since there is a fluctuation in the proportion of males with scutellar tuft occurring in a single population, the observed morphological differences might be environmentally determined.
Key words: Apidae, Euglossini, Euglossa, male dimorphism
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AGRADECIMENTOS. Gostaria de agradecer ao Sr. Geraldo Paiva pelo auxílio no trabalho de campo. À Patrícia Santos Ferreira-Peruquetti e Daniele Boraschi pela leitura da primeira versão do manuscrito e pelas sugestões apresentadas. Aos consultores anônimos da RBZ pelas sugestões que contribuíram muito para a melhoria do trabalho. Este trabalho foi financiado em parte pela FAPEMIG. A FAPESP contribuiu com o auxílio financeiro (Proc. 98/16390-0) durante a redação do manuscrito.
Recebido em 13.V.2002; aceito em 29.X.2002.
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Datas de Publicação
-
Publicação nesta coleção
11 Maio 2009 -
Data do Fascículo
Dez 2002
Histórico
-
Aceito
29 Out 2002 -
Recebido
13 Maio 2002
