The Enidae of Timor (Stylommatophora: Orthurethra)

The systematic classification of the Enidae of Timor is reviewed by means of comparative morphology and molecular phylogenetics using recently collected land snail samples from Timor-Leste (‘East Timor’). Features of the renal and genital anatomy as well as analyses of nuclear 28S rRNA sequences confirm the placement of the species in the Enidae. Generic combinations employed by earlier authors are discussed. The name Coccoderma Möllendorff, 1901 used for enids from the Indo-Australian Archipelago is pre-occupied by Coccoderma Zittel, 1887 and therefore not available. The assignment of species from Timor to Pseudonapaeus Westerlund, 1887, which is otherwise known from central Asia, is also rejected. Instead, the Enidae from Timor are here affiliated with Apoecus Kobelt, 1902, a name originally introduced for the Papuan species Buliminus colonus Möllendorff, 1895. While Apoecus samples from Timor-Leste form three distinct mitochondrial clades, only two groups can be reliably distinguished by their morphology. One of these groups represents the previously named species Apoecus apertus (Martens, 1863). This species is found throughout lowland Timor occurring at altitudes of up to 600?m. The second species has been found in the Ramelau Mountains at altitudes above 1300?m, and is described as Apoecus ramelauensis n. sp.

http://zoobank.org/urn:lsid:zoobank.org:pub:3A8781B6-6EAC-4C58-8DB3-63741B03B43C     

中国巴蜗牛科一新种(肺螺亚纲：柄眼目：巴蜗牛科)

作者对中国科学院动物研究所馆藏的巴蜗牛科标本进行了整理,并已知我国平瓣蜗牛属Ｐｌａｔｙｐｅｔａｓｕｓ共计１６种和亚种,其中现发１新种,即磁县平瓣蝇牛Ｐｌａｔｙｐｅｔａｓｕｓ ｃｉｘｉａｎｅｎｓｉｓ Ｃｈｅｎ ｅｔ Ｚｈａｎｇ,ｓｐ．ｎｏｖ．,对新种的形态特征作了详细描述,与其近假种进行了比较和讨论。     

云南扭轴蜗牛科一新种记述(肺螺亚纲,柄眼目,扭轴蜗牛科)

笔者在整理云南省勐腊地区陆生贝类标本时,经鉴定发现1新种,即双沟皮氏螺Perrottetia biboncavus sp.nov..隶属于肺螺亚纲、柄眼目、扭轴蜗牛科、皮氏螺属.对新种形态特征、栖息环境作了记述,并对其近似种也进行了讨论.     

Distribution of bulimulid land snails on the northern slope of Santa Cruz Island, Galapagos

The observations made along south-north transects on Santa Cruz Island's northern slope show that the distribution of bulimulid land snails follows a distinct zonation. Their zonation pattern is related to the well-marked plant zonation, the substrate and the important climatic gradient characterizing this area.
Live snails and shells belonging to 14 bulimulid taxa were collected along a transect (11 km long) starting from Cerro Puntudo, one of the island's highest points. Their distribution, the vegetal zonation and the rapid change in the climate observed along the transect are described.     

中国婴螺属一新种记述(腹足纲,肺螺亚纲,柄眼目,艾纳螺科)

记述采自甘肃省陆生贝类1新种,天水婴螺Pupinidius tianshuiensis sp.nov.,文中对新种形态特征、栖息环境进行了描述,并与其相似种进行了比较和讨论。     

中国真管螺属一新种记述(肺螺亚纲,柄眼目,烟管螺科)

记述采自云南省石林县陆生贝类1新种,大叠水真管螺Euphaedusa dadieshuiensis sp.nov.,文中对新种形态特征、栖息环境进行了描述,并对其相似种进行了分析和讨论。     

Arnhemtrachia ramingining: a new genus and species of land snail from Arnhem Land,Australia (Stylommatophora: Camaenidae)

The new, monotypic camaenid genus Arnhemtrachia is described for the new species Arnhemtrachia ramingining from Ramingining, Arnhem Land, Northern Territory, Australia with additional records from the Gove Peninsula in eastern Arnhem Land. This camaenid is characterised by a combination of distinct morphological features, such as a small, discoidal, keeled shell with regular axial ribs, open umbilicus and simple, rounded aperture as well as a reproductive system with a long epiphallus possessing a long flagellum and absence of a penial sheath, with a flap on the penial wall which transverses longitudinal pilasters, and a long, simple bursa copulatrix. Based on comparative morphology, Arnhemtrachia reveals affinities with Trozena morata Iredale, 1838 from NE Queensland.     

Satsuma jinlunensis— a new species from Taiwan (Stylommatophora: Camaenidae)

A new species of camaenid land snail, Satsuma jinlunensis n. sp., from southeastern Taiwan is established. This species inhabits the lowland forests with a narrow geographical distribution insofar as we know. The species is characterised by having a sinistral shell, a rounded periphery, an oblique columellar lip joining the basal lip smoothly, an open umbilicus, a coiled flagellum, an absent or weakly developed penial caecum, a hemispherical verge internally, and a pedunculus of the bursa copulatrix expanded medially. The new species is distinguishable from congeners by a combination of its sinistral and conical shell, and coiling of the flagellum and part of the epiphallus. The characteristics of male genitalia and species biodiversity of terrestrial snails in southern Taiwan are discussed.

http://zoobank.org/urn:lsid:zoobank.org:pub:96F3118C-09B9-4ED4-AAB7-2DBEE978459F     

中国陆生贝类二新种（肺螺亚纲：柄眼目：虹蛹螺科）

１９９２年３月至５月,作用在陕西省考察,获得陆生贝类一批,经鉴定发现２新种,即双片喇叭螺Ｂｏｙｓｉｄｉａ ｄｉｌａｍｅｌｌａｒｉｓ ｓｐ．ｎｏｖ．和凤县喇叭螺Ｂｏｙｓｉｄｉａ ｆｅｎｇｘｉａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．,隶于肺螺亚纲、柄眼目、虹蛹螺科、喇叭螺属。文内对２新种形态特征、栖息环境进行地描述,并对其相似种进行了讨论。     

Umsatz von Lymphozyten in Blut und Lymphknoten der Ratte

Summary Mature spermatozoa from the seminal vesicles of adult Agriolimax reticulatus have been studied by means of phase contrast and electron microscopy; sperm were either live, or sectioned or mounted whole and shadowed with gold. The cell is of the typical pulmonate sperm type with a simple acrosome and a spiral nucleus comprising the head, and a tail which is ensheathed along its entire length by mitochondrion. The 9 peripheral fibrils of the axial complex show no indication of a double nature. Within the spermatheca or gametolytic gland breakdown of sperm occurs; the nucleus and axial fibre bundle of the flagellum survive the longest. The complexity of the flagellum and the relative simplicity of the acrosome are discussed in light of the ecology of the spermatozoa. Many problems concerning the functional physiology of the sperm organelles remain to be investigated.