【摘要】 <正> 爱莉苔虫(Genus Ellisina Norman,1903)隶于外肛动物门唇口目无囊亚目软壁超科片苔虫科(Hincksinidae)。该属主要特征是:个虫膜孔型;卵胞内陷型,由口盖关闭;代位鸟头体通常属尖型。它与片苔虫科的片苔虫属Hincksisina Norman 1903的主要区别在更多还原

【Abstract】 This paper deals with three species of genus Ellisina Norman 1903 (Cheilostomata: Anasca: Malacostegoidea: Hincksinidae), of which Ellisina canui (Sakakura, 1935) is recorded for the first time from Chinese Waters, the rest are new to science. The type specimens of the new species are preserved in the Institute of Oceanology, Academia Sinica. The descriptions of the two new species are given below. 1. Ellisina costigera sp. nov. (Fig. 1: a) Colony yellowish-white, unilaminar, encrusting. Zooids oval mostly, arranged radiatively, wider laterally and proximally, and narrower distally. Proximal gymnocysts variable during their growth for different zooids. Cryptocyst well-developed, wider laterally and proximally and narrower distally. On the surfaces of the cryptocysts there are many costae and the surfaces are sculptured with lots of fine granules both on costae and intercostal areas. Interzooecial avicularia ren-shaped, variable in size, growing separately up as lateral bud of the mother zooid. Endozooecial ovicells large, wider than long, their frontal surface convex and having a crescent membranous fenestra. One distal and two lateral pore-plates (multiporous) at each zooid. This new species is distinct from the known species of genus Ellisina in its cryptocyst having rib-like sculptures, in its avicularia which are growing up as lateral buds of the mother zooids and having the form of a ren, and in its ovicells being marked with crescent membranous fenestrae. 2. Ellisina eirculatis sp. nov. (Fig. 1: b—e) Colonies yellow, unilaminar, encrusting. Zooids expanded laterally, narrowest proximally, rounded distally. Mural rims thick, smooth, not raised. Proximal gymnocyst well-developed, elongated, smooth. Cryptocyst narrow, smooth. Frontal membrane oval, occupying four thirds of the front. Avicularia small, convex, immersed in the gymnocysts of autozooids, with circular mandibles being usually directed proximally. Endozooecial ovicells large, convex, marked with dense fine granules. One distal and four lateral pore-plates (multiporous) on each zooids. This new species is somewhat similar to Ellisina Canui (Sakakura, 1935) in shape of ovicells. In the latter zooids have the form of a rounded triangulle, avicularia are at the boundaries between autozooids, and have triangular mandible while in this new species zooids are of a elongated shape which is narrower proxi-distally and wider in the middle, avicularia are immersed in the gymnocysts of autozooids and have a rounded mandible.更多还原