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Evolutionary origin of the insect wing via integration of two developmental modules
TLDR
The data suggest that two regulatory modules involving wg–vg are present in apterygote insects: one associated with lateral body region and induces stick‐like dorsal limb branches, the other associated with the boundary of dorsal and lateral body regions and the flat outgrowth of their interface.
Species diversity of insects in Japan: Their origins and diversification processes
Japan is considered a global hot spot of biodiversity. With regard to species diversity, insects are no exception. To date, more than 32,000 insect species have been identified in Japan, while around
Rapid expansion of the distributional range and the population genetic structure of the freshwater amphipod Crangonyx floridanus in Japan
TLDR
It is found that this amphipod has already reached Hokkaido, northernmost Japan, which suggests that it has undergone rapid expansion in a pattern of concentric circles from the central part of Japan.
Characterization of abdominal appendages in the sawfly, Athalia rosae (Hymenoptera), by morphological and gene expression analyses
TLDR
A possibility is suggested that the abdominal and anal prolegs of A. rosae are outgrowths of ventral plates which derived from coxopodal elements, but not main axes of appendages.
Paradiplozoon skrjabini ( Monogenea , Diplozoidae ) , an Ectoparasite on the Gills of Freshwater Fishes ( Cyprinidae , Leuciscinae ) of Japan and Primorsky Region , Russia : a Morphological and
TLDR
Paradiplozoon skrjabini unusually has low host specificity (on seven species of four genera of leuciscine fishes) and a wide range of geographical distribution (in eastern Eurasia: the Amur River system of Russia and China; Primorsky Region and Sakhalin Island, Russia; and Hokkaido and Honshu, Japan).
Reproductive Biology and Adaptability of the Invasive Alien Freshwater Amphipod Crangonyx floridanus (Crustacea: Amphipoda, Crangonyctidae)
TLDR
C. floridanus's strong capacity to adapt to broad and variable environmental conditions is certainly contributing to its high rate of population increase, and rapid dispersion throughout Japan.
Detection of an endangered aquatic heteropteran using environmental DNA in a wetland ecosystem
The use of environmental DNA (eDNA) has recently been employed to evaluate the distribution of various aquatic macroorganisms. Although this technique has been applied to a broad range of taxa, from
Embryogenesis of the mayfly Ephemera japonica McLachlan (Insecta: Ephemeroptera, Ephemeridae), with special reference to abdominal formation
TLDR
It is concluded that the caudal filament should be correlated not to the eleventh abdominal segment but to the telson, and this manner of abdominal formation may be regarded as basic in pterygote insects, because a similar manner is found in another palaeopteran group, the odonatans.
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