Rhizocephalans (Crustacea: Cirripedia) from Taiwan

One species of shrimp and sixteen species of brachyuran crabs are parasitized by rhizocephalans in Taiwanese waters. Ten of the crabs have never before been recorded as hosts of rhizocephalans. Eight species of rhizocephalans occur in Taiwan. Four species, Diplothylacus taiwanensis, D. calappae, Sacculina scutigera and S. docleae are new to science. The paper records the first example of simultaneous infection of the same host individual by two rhizocephalan species, and provides further evidence of successive moulting of the external mantle cuticle in several species of sacculinids.     

喜马拉雅低额溞一新亚种(甲壳纲:双甲目)

本文描述了新亚种微齿低额溞。本新亚种与指名亚种的主要区别在于前者壳纹粗显,使后背缘呈细微的锯齿状;头顶较尖窄,头部腹面较凹,吻较长而稍上翘。第一触角的触毛长在基部。第二触角较短,尚不及体之中部。后腹部末端较宽,然而长有肛刺的一段又比喜马拉雅低额溞为窄,肛背角更为突出,肛刺数目也较多。     

Cyclocypris diebeli Absolon, 1973 (Ostracoda,Crustacea), extinct in Europe,extant in Japan

Fossil Cyclocypris diebeli Absolon, 1973 Absolon, A. 1973. Ostracoden aus einigen Profilen spät- und postglazialer Karbonatablagerungen in Mitteleuropa,. Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Historische Geologie, 13: 47–94.  [Google Scholar] from Europe are redescribed, utilizing material with chitinous preservation of the appendages and carapace. These are compared with living C. diebeli from Kushiro Marsh, Hokkaido, Japan, representing the first living population of this species ever found. The fossil material is associated with strongly calcareous sediments, whereas the living material is found in weakly calcareous to acidic waters. Reasons for the different ecological requirements are discussed. Detailed study of soft parts of both living and fossil material using SEM is compared with other Cyclocypris species and it is shown that C. diebeli is more closely related to the North American Cyclocypris cruciata Furtos, 1935 Furtos, N. C. 1935. Fresh-water Ostracoda from Massachusetts,. Journal of the Washington Academy of Sciences, 25: 530–544.  [Google Scholar] than to any European congeneric species. Furthermore, the comparison with other Cyclocypris species with left>right valve overlap results in the conclusion that the subgenus Laevicypris Krsti?, 1995 Krsti? N 1995 A new Cyclocypris subgenus—Laevicypris, in J. Ríha (ed.) Ostracoda and Biostratigraphy. Proceedings of the 12th International Symposium on Ostracoda (Rotterdam: A. Balkema), pp.?37–42  [Google Scholar] is not a useful division of the genus.     

Larval development of Pandalus gracilis Stimpson (Crustacea: Decapoda: Pandalidae) reared in the laboratory

The complete larval development of Pandalus gracilis Stimpson is described based on larvae reared in the laboratory. The species has four larval stages (stages 1–4) and one postlarval stage (stage 5). The survival rate of the postlarva stage is very high. Of the 40 larvae reared individually, 39 larvae moulted to the postlarva stage within approximately 21 days at a rearing temperature of 15°C. Larval morphological characteristics of the species are described and figured. Larval development of P. gracilis is compared with other Pandalus and Pandalopsis species. Komai (1999 Komai, T. 1999. A revision of the genus Pandalus (Crustacea: Decapoda: Caridea: Pandalidae).. Journal of Natural History, 33: 1256–1372.  [Google Scholar]) divided species of Pandalus into four species groups based on adult morphology. Pandalus gracilis belongs to the P. hypsinotus group. In this study, using larval characters, the P. hypsinotus group can be divided into two groups by the appearance of the mandibular palp and the shape of the telson: the first group contains P. hypsinotus and P. danae, and the second group contains P. gracilis, P. prensor, and P. nipponensis.     

我国有柄蔓足类两新记录

本文描述了我国匙茗荷科有柄蔓足类两新记录:三齿裂楯茗荷和阿氏薄板茗荷星板亚种.所依据的标本于1980年至1982年间采集自我国东海北部海域.三齿裂椐茗荷见于三疣梭子蟹、远游梭子蟹、白斑?、武士?以及锦蟹的颚足或鳃腔入水孔周围体壁,阿氏薄板茗荷星板亚种大量附着于脊龙虾的鳃上.