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Granivory is a specialized food habit in the predominantly carnivorous beetle family Carabidae. Most studies of carabid granivory have been conducted under laboratory conditions; thus, our knowledge of the feeding ecology of granivorous carabids in the field is insufficient. I conducted field observations of climbing behavior and seed predation by adult(More)
This study examined larval food habits of two syntopic, related, carabids Amara chalcites Dejean and A. congrua Morawitz using a laboratory-rearing experiment, and the results were compared with those of a previous stable-isotope analyses of the same species. Larvae were reared on six different diets (seeds of Capsella bursa-pastoris (Linnaeus) Medikus,(More)
A morphological association between genitalia and ejaculates could provide insight into the function and evolution of genitalia. In this study, the morphologies of the ejaculates and male genitalia of 15 species of Pterostichini and two species of Platynini (Coleoptera: Carabidae) are described. All the species examined formed a spermatophore, the(More)
Pterostichus (Nialoe) asymmetricus Bates and its allies are revised based on the membranous parts of their genitalia. Four new taxa, P. (N.) ovaliphallus sp. nov., P. (N.) fujimurai ibukiyamanus ssp. nov., P. (N.) shotaroi kiimontanus ssp. nov., and P. (N.) basilobatus sp. nov. are described. A cladistic analysis based on 31 morphological characters reveals(More)
A phylogenetic hypothesis of the subgenus Nialoe (s. lat.) of genus Pterostichus is proposed based on a cladistic analysis of seventeen morphological characters. Through comparative studies of the sclerites on the endophallus of male genitalia, it became apparent that the arrangement of these sclerites reflects seven different origins. The results show that(More)
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