A new species of eulepethid polychaete, Grubeulepis malayensis, is described. It lives in empty tubes of the chaetopterid polychaete Mesochaetopterus selangolus (Rullier, 1976) collected from a sandy beach at Morib Beach, near Kuala Lumpur, Malaysia. The species is distinguished by the lack of papillae on the first pair of elytra, possession of spinous notopodial hooks, and the presence of acicular neurochaetae on segments 2 to 5. It is unique in its genus in possessing a single pair of prostomial eyes and in having a short anal cirrus on the right side.
Two new species of the shallow-water mysid genus Heteromysis (Crustacea : Mysidacea) are reported from a submarine cave on Christmas Island, eastern Indian Ocean. Heteromysis dentata sp. nov. is characterized by eyes without ocular processes, the telson with lateral spines along its distal half, the posteromedian cleft of the telson with spinules along its entire margin, and the four posterior thoracic endopods each with a seven-segmented carpopropodus. Heteromysis longiloba sp. nov. is characterized by eyes without ocular processes, the telson with lateral spines along slightly more than its posterior half, the posteromedian telson cleft with spinules only along its anterior margin, and the inward-curving endopods of the uropods bearing 12 mesial spines. The Indo-Pacific species of Heteromysis are briefly reviewed.
The conifer-feeding webspinning sawfly genus Acantholyda is reviewed for Japan. Fourteen species, one of which has two subspecies, are recognized and keyed. Of these, two species and one subspecies, A. mizunoi from central Honshu (host plant : Tsuga), A. tsuyukii from central Honshu and Shikoku (host plant : Tsuga), and A. aglaia stigma from central Honshu (host plants : Picea and Abies), are described as new. This is the first Palearctic host plant record of Acantholyda from a species of Abies. Descriptions are given for the previously unknown males of A. albomaculata Shinohara, 1985 and A. iwatai Takeuchi, 1938, and A. iwatai is newly recorded from Shikoku and Kyushu. New host plant records are given for A. nipponica Yano and Sato, 1928 and A. sasakii (Yano, 1916).
The adults, male and female, of Tanypus formosanus (Kieffer, 1912) are redescribed, while the immature forms, pupa and larva, are described for the first time. This species has been treated as a junior synonym of T. punctipennis Meigen, 1818 for a long time, but their immature forms are quite distinct.
A new species of poecilopsettid flounder, Poecilopsetta macrocephala, is described based on seven specimens from 550-555 m depth on the continental slope off northwestern Australia. This species resembles P. vaynei Quero et al., 1988 and P. natalensis Norman, 1931 in number of lateral line scales (75-78), but it can be distinguished from these species in the more-expanded profile above the upper eye ; the relatively larger head (26.6-29.6% of SL), shallower body (34.9-37.3% of SL), larger upper (11.6-12.3% of SL) and lower (11.3-13.0% of SL) eye diameters, larger orbit length (11.7-13.0% of SL), and larger lower jaw length (11.4-12.5% of SL [ocular side], 11.0-12.7% [blind side]) ; and its fewer caudal vertebrae (28-29).