Showing papers by "Fuminori Ito published in 2014"
Journal Article•
TL;DR: All species, including the known queens, are illustrated and a key to the species of the subgenus is provided and a case of apparent character displacement between these species is noted.
Abstract: The nominal subgenus Polyrhachis of the genus Polyrhachis Fr. Smith is reviewed. Eleven species of the subgenus are recognised, including ten previously described (Polyrhachis bellicosa Fr. Smith, P. bihamata (Drury), P. craddocki Bingham, P. erosispina Emery, P. olybria Forel, P. lamelidens Fr. Smith, P. mindanaensis Emery, P. montana Hung, P. taylori Kohout and P. ypsilon Emery) and one, P. maliau, described as new. The worker and the queen of P. bellicosa and the worker of P. erosispina are redescribed and a case of apparent character displacement between these species is noted. The worker of P. olybria and queens of P. mindanaensis and P. ypsilon are described. A key to the species of the subgenus is provided and all species, including the known queens, are illustrated.
8 citations
Journal Article•
TL;DR: The classification of the tribe Dacetini is highly debated, Baroni Urbani and de Andrade (2007) treated Pyramica as synonym of Strumigenys, and phylogenetic analysis based on molecular data show that neither genus is monophyletic (Moreau and Bell 2013).
Abstract: The ant tribe Dacetini contains more than 800 species (Bolton et al. 2006). Many dacetine ants are specialized predators on soil inhabiting arthropods such as Collembola, Acarina, and to some extent also Diplura (Brown and Wilson 1959; Masuko 1984, 2009ab; Wilson 1953). Due to their peculiar morphological characteristics related to this specialized predation, dacetine ants have attracted the interest of many myrmecologists, who have described a diversity of hunting behaviors in these ants (e.g. Brown and Wilson 1959; Dejean 1986, 1988; Wilson 1953; Masuko1984, 2009ab). Moreover, some species are known as tramp species, e.g. Strumigenys emmae (Emery, 1890), Strumigenys membranifera Emery, 1869, and Strumigenys rogeri Emery, 1890 (Brown 1949, 1954; Brown and Wilson, 1959). To date, habitat preferences of dacetine ants have been poorly reported and quantitative results remain scarce except for some ant community studies (e.g. Graham et al. 2004). In this tribe, Strumigenys and Pyramica are the most species-rich genera (Bolton 2000, Bolton et al. 2006). However, the classification of the tribe Dacetini is highly debated. Baroni Urbani and de Andrade (2007) treated Pyramica as synonym of Strumigenys, and phylogenetic analysis based on molecular data show that neither genus is monophyletic (Moreau and Bell 2013). Therefore we follow Baroni Urbani and de Andrade (2007), SHORT COMMUNICATIONS
6 citations
TL;DR: Argentine ant invasion changed colour-polymorphic composition of ant-mimetic jumping spider Myrmarachne in southwestern Japan, and Disappearance of blackish model ants supposedly led to malfunction of Batesian mimicry of Myrmarchne.
Abstract: Argentine ant invasion changed colour-polymorphic composition of ant-mimetic jumping spider Myrmarachne in southwestern Japan. In Argentine ant-free sites, most of Myrmarachne exhibited all-blackish colouration. In Argentine ant-infested sites, on the other hand, blackish morph decreased, and bicoloured (i.e. partly bright-coloured) morphs increased in dominance. Invasive Argentine ant drives away native blackish ants. Disappearance of blackish model ants supposedly led to malfunction of Batesian mimicry of Myrmarachne.