中国喇叭螺属的动物地理分析及一新种记述(肺螺亚纲:柄眼目:虹蛹螺科)

ZOOGEOGRAPHICAL ANALYSIS OF THE BOYSIDIA(ANCEY, 1881)IN CHINA,DESCRIPTION OF A NEW SPECIES (PULMONATA: STYLOMMATOPHORA: PUPILLIDAE)

分析了中国喇叭螺属Boysidia (Ancey ,1881)种类地理分布 ,以东洋界的成分为主 ,最北已分布至北纬 34°5′。文中报道 1新种 ,即潼关贝喇叭螺Boysidia (Bensonella)tongguanensissp .nov .。

Boysidia Ancey, 1881 is a small group of the Chondrininae distributed in South Asia and Southeast Asia. A total of 17 species were recorded in South Qinling Mountains, China, of which one was considered new to science a description of the new species and a key to all 17 species are given in the text.All specimens,including the types of new species are kept in the Institute of Zoology,Chinese Academy of Sciences.Key to the subgenera of genus Boysidia 1 Axial lamella knob shaped and hiden inside aperture, angular lamella and parietal lamella fused to form a short, narrow and curved bilobed lamella Boysidia (Dasypupa) Thompson and Dance, 1983 Axial lamella not knob shaped2 2 Columellar lamella downwardly curved3 Columellar lamella horizontal Boysidia (Paraboysidia) Pilsbry, 1917 3 Angular lamella and parietal lamella fused into a bilobed lamella, palatal folds and Lamellae hook shaped Boysidia (Bensonella) Pilsbry, 1900 Angular lamella and parietal lamella separated and parallel to each other Boysidia (Boysidia) Pilsbry, 1917Key to the species of Boysidia of China 1 Columellar lamella horizontal2 Columellar lamella sloping downward and inwards4 2 Shell higher than 2?mm, with 6.5 whorls Boysidia (Bensonella)shilinensis Chen Shell lower than 2?mm, with no more than 5.5 whorls3 3 With 9 apertural lamellae Boysidia (Bensonella) plicidens (Benson, 1849) With 2 apertural lamellae Boysidia (Bensonella) dilamellaris Chen With 5 apertural lamellae,with lower palatal folds Boysidia (Bensonella) tianxingqiaoensis Chen With 5 apertural lamellae, without lower palatal folds Boysidia (Bensonella) tongguanensis sp. nov. 4 Supracolumellar lamellae hooked Boysidia (Paraboysidia) hubeina (Gredler, 1901) Supracolumellar lamellae not hooked5 5 With a strong columellar lamellae 6 With a thin columellar lamellae 8 6 Shell lower than 3.3?mm 7 Shell higher than 3.3?mm Boysidia (Boysidia) pentadens Chen 7 Shell wider than 2.0?mm, with 5.5 whorls Boysidia (Boysidia) taibainensis Chen Shell width less than 2.0?mm, with 6.0 whorls Boysidia (Boysidia) strophostoma (Moellendorff, 1885) 8 Shell height 4?mm9 Shell height less than 3?mm 11 9 Columellar lamella straight10 Columellar lamella curved Boysidia (Boysidia) gracilis Haas, 1937 10 Upper palatal folds slant downward Boysidia (Boysidia) conspicua (Moellendorff, 1885) Upper palatal folds do not slant downward Boysidia (Boysidia) dorsata (Ancey, 1881) 11 Upper palatal folds reaching parietal lamella, lower palatal folds somewhat deeper inside the aperture Boysidia (Boysidia) hangchowensis (Pilsbry et Hirase, 1908) Upper palatal folds not reaching parietal lamella12 12 Palatal folds less than 6 13 Aperture with 9 palatal folds Boysidia (Boysidia) fengxianansis Chen 13 Aperture with 5 palatal folds Boysidia (Boysidia) hunana (Gredler, 1881) Aperture with 4 palatal folds 14 With 1 infrapalatal fold Boysidia (Boysidia) xishanensis Chen Without 1 infrapalatal fold Boysidia (Boysidia)huangguoshuensis Chen1 Description of new species Boysidia (Bensonella) tongguanensis sp. nov. Holotype. Height 3.89?mm,diameter 2.56?mm,aperture height 1.56?mm,aperture diameter 1.30?mm., collected from Lijia Town, Tongguan County (34°5′N, 110°2′E), Shaanxi Province, China, 20 July 1978. Paratypes 6 specimens, height 3 78\|4 10?mm,diameter 2 30 2 67?mm,aperture height 1 40 1 78?mm,aperture diameter 1 20 1 60?mm, collected from Lijia Town, Tongguan County (34°5′ N, 110°2′ E), Shaanxi Province, China, 20 July 1978. Shell small, thin, lustrous, elongatedly conic. Whorls 512, moderately convex with high spiral part. Spire long conical. Shell yellowish brown in colour, regularly and weakly striatulate, silkg. Apex blunt, suture deep. Aperture rounded\|oval, thrust forward, peristome reflected, well expanded, continuous, with 5 lamellae and folds. The angular and parietal lamella are concres