The coral-inhabiting hermit crab Paguritta gracilipes Melin, 1939 has been represented only by the two syntypes and three more recent specimens, all from the Ogasawara Islands. An additional specimen obtained from Hachijo Island in the Izu Islands now allows us to describe more precisely the coloration in life, which is an important diagnostic feature for identifying the species of the genus. The study of one of the two syntypes and other available specimens has revealed morphological inaccuracies in published accounts and made possible the description of the left cheliped for the first time. This species is rediagnosed and illustrated in detail.
Three species and one subspecies of Pleurogonium, including two new to science, are reported from Akkeshi, Hokkaido, as the first record of this genus from northern Japan. Pleurogonium bifolium sp. nov. has bilobed coxal plates and posterolaterally projecting pereonites 2-4 as in P. godeevae Kussakin, 1962, but it is distinguished from the latter in having a frontally bilobed head, pereonite 1 with a pair of stout lateral projections, and a pleotelson with its greatest width anteriorly. Pleurogonium hispidum sp. nov. differs from its congeners by the presence of a trilobed frontal margin of the head and a pair of mid-dorsal setae on all ten segments from head to pleotelson. Pleurogonium angustum Kussakin, 1972 and P. inerme orientale Kussakin, 1962 are recorded from Japan for the first time.
Ten species of mite of the family Macrochelidae (genera Glyptholaspis, Macrocheles, and Neopodocinum) are recorded from the body surface of dung beetles from Bali, Indonesia. Of those mites, two species, Macrocheles baliensis sp. nov. and M. monticola sp. nov., are described as new to science. Neopodocinum spinirostris (Berlese, 1910) is redescribed on the basis of adults and immature stages collected from Bali. Seven species, Glyptholaspis fimicola (Sellnick, 1931), Macrocheles hallidayi Walter and Krantz, 1986, M. krantzi Evans and Hyatt, 1963, M. merdarius (Berlese, 1889), M. oigru Walter and Krantz, 1986, Neopodocinum jaspersi (Oudemans, 1900), and N. spinirostris (Berlese, 1910), were recorded from Bali for the first time. Macrocheles arabaesc nom. nov. is proposed as a replacement name for M. scarabae Chinniah and Mohanasundaram, 1995 (preoccupied by M. scarabae Vishnupriya and Mohanasundaram, 1988).
Two new species of the Copidognathus tricorneatus group are described from reefs of the Great Barrier Reef lagoon in northeastern Australia : C. leptoporus sp. nov. and C. megaloporus sp. nov. A key to Australian species in the C. tricorneatus group is provided.
A new genus, Sazonia gen. nov. (type species : Sazonia gorodinskii sp. nov.), including two new subgenera, Sazonia subgen. nov. and Miniosa subgen, nov. (type species : Sesia fenusaeformis Herrich-Schaffer, 1852), and a new species, Sazonia (Sazonia) gorodinskii sp. nov. are described and figured from extra-tropical Asia. Probable trends of the origin of all these taxa are discussed.