Species Diversity

A New Species of Scaleworm, Grubeulepis malayensis (Annelida : Polychaeta : Eulepethidae), from Morib Beach, Malaysia, Living in Chaetopterid Tubes

Eijiroh Nishi

Article type: Article
2001 Volume 6 Issue 1 Pages 1-9
Published: February 28, 2001
Released on J-STAGE: March 30, 2018

DOIhttps://doi.org/10.12782/specdiv.6.1

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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.

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Two New Shallow-water Mysids of the Genus Heteromysis (Crustacea : Mysidacea) from a Submarine Cave of Christmas Island, Eastern Indian Ocean

Yukio Hanamura, Tomoki Kase

Article type: Article
2001 Volume 6 Issue 1 Pages 11-21
Published: February 28, 2001
Released on J-STAGE: March 30, 2018

DOIhttps://doi.org/10.12782/specdiv.6.11

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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.

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Conifer-feeding Webspinning Sawflies of the Genus Acantholyda (Hymenoptera : Pamphiliidae) of Japan

Akihiko Shinohara

Article type: Article
2001 Volume 6 Issue 1 Pages 23-63
Published: February 28, 2001
Released on J-STAGE: March 30, 2018

DOIhttps://doi.org/10.12782/specdiv.6.23

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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).

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The Immature and Adult Stages of Tanypus formosanus (Kieffer) (Diptera : Chironomidae)

Hiromi Niitsuma

Article type: Article
2001 Volume 6 Issue 1 Pages 65-72
Published: February 28, 2001
Released on J-STAGE: March 30, 2018

DOIhttps://doi.org/10.12782/specdiv.6.65

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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.

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A New Dextral Flounder, Poecilopsetta macrocephala (Pisces : Pleuronectiformes : Poecilopsettidae), from Northwestern Australia

Koichi Hoshino, Kunio Amaoka, Peter R. Last

Article type: Article
2001 Volume 6 Issue 1 Pages 73-81
Published: February 28, 2001
Released on J-STAGE: March 30, 2018

DOIhttps://doi.org/10.12782/specdiv.6.73

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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).

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