Five species of Tubificidae are reported from the Tan Shui and Shuang Hsi estuaries in northern Taiwan : Doliodrilus tener Erseus, Monopylephorus rubroniveus Levinsen and M. limosus (Hatai) from a salinity range of 12-32‰, and Branchiura sowerbyi Beddard and Limnodrilus hoffmeisteri Claparede, both primarily freshwater forms, from oligohaline reaches (1-2‰ salinity) of highly polluted rivers. A find of D. tener at Kin Men Island near mainland China is also recorded.
Domed mural "hoods" with distinct, pore-like openings occur on the inner accretionary surface of the basal walls of at least twelve species (representing four suborders) of cyclostome bryozoans. The openings are invariably on the proximal side with respect to skeletal wall growth direction. Mural hoods develop independently of skeletal ultrastructural fabric type, with similar structures occurring in walls representing a wide range of fabric suites. The structures are variable in size and shape, varying in outline from sub-circular or oval to pear-shaped, sometimes with a distinct, tubular extension leading to the opening. Variations in hood size and shape in different species may be potentially useful taxonomically to the genus level, and as hard part characters for phylogenetic analysis. The arrangement and direction of hood openings in the protoecium (primary disc) lend support to ultrastructure-based inferences of centripetal growth of the basal floor of the disc.
The zoeal development of four species of Petrolisthes, P. asiaticus, P. hastatus, P. moluccensis, and P. tomentosus, is described and illustrated based on material reared in the laboratory. These species possess two zoeal stages. The zoeae of all four species belong to Group 4 of Osawa (1995), based on the morphological characters of the maxilla, first maxilliped, and telson. The Indo-West Pacific species assigned to this group, except for P. boscii, share a characteristic kind of telson that has a bifid spine at each lateral angle in the first zoea. This feature is also found in zoeae of Neopetrolisthes.
A new tubificid oligochaete, Aulodrilus acutus, is described from Padang, West Sumatra, Indonesia. It resembles Aulodrilus pigueti Kowalewski by sharing oar-shaped chaetae, globular atria, and a median male bursa, but is distinguished by having tapering distal ends to the oar-shaped chaetae and by lacking penial chaetae and the associated glands. Aulodrilus pigueti and Teneridrilus sp. are also described. Branchiura sowerbyi and Limnodrilus hoffmeisteri are recorded from Sumatra.
A new species, Copidognathus dictyotus, is described and illustrated. The species is the second Australian member of the tricorneatus species-group. Other records of this group are from the northeastern Pacific (Aleutians), western North Atlantic, Caribbean Sea, eastern North Atlantic, Mediterranean Sea and Black Sea. The species in this species-group are diagnosed and a key to all eight species is given.
In 1985-1986 a study on terrestrial tardigrades was carried out on the northern slope of Mt. Fuji. As the third part of the taxonomic report on the Eutardigrada collected there, the present paper treats the families Macrobiotidae and Milnesiidae. Nine species of the two families were recorded, including a new species of Pseudodiphascon.
The hoverflies of Sakhalin and the islands of the Kuril Archipelago are reviewed. In total, 261 species are recognized ; 19 other species are listed as doubtful taxa. Two new species are described, one genus and 15 species are placed into synonymy, and 31 are recorded for the first time on Sakhalin and/or the Kuril Islands. Redescriptions or new diagnoses are given for two species, and there are two new combination. References to previous works, geographic distribution, and a list of material examined (including numbers of specimens, localities of capture, and approximate times of the year when the flies are in flight) are given for each species.