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PHYLOGENY OF THE GENUS ROSTANGA (NUDIBRANCHIA), WITH DESCRIPTIONS OF THREE NEW SPECIES FROM SOUTH AFRICA 总被引:1,自引:0,他引:1
GAROVOY JOCELYN B.; VALDES ANGEL; GOSLINER TERRENCE M. 《Journal of Molluscan Studies》2001,67(2):131-144
Rostanga elandsia sp. nov., Rostanga aureamala sp. nov. andRostanga
phepha sp. nov. are characterized by having the radulawith slender
innermost lateral teeth, which lack denticles onthe inner side of the
cusp and have a single denticle on theouter side. The outermost
lateral teeth of these three speciesare elongate, but shorter than in
other species of the genus.In addition, R. aureamala is the only
species of the genus withrachidian teeth and R. phepha is unique
within the genus Rostanga byvirtue of its white coloration with dark
spots. A phylogenetic analysis shows that the three new species fromSouth
Africa and Rostanga setidens (Odhner, 1939) are the sistergroup of
the rest of the genus. The species from Japan and MarshallIslands
(North Pacific Ocean) are basal in the sister cladecontaining the
other species of Rostanga Bergh, 1879. The tropicalIndo-Pacific
species of Rostanga are not monophyletic. The Atlanticand Eastern
Pacific species form a monophyletic, derived clade,being the sister
group of Rostanga australis Rudman & Avern,1989, which has a narrow
range restricted to south eastern Australia.The widespread
Indo-Pacific species Rostanga bifurcata Rudman& Avern, 1989, is the
sister group of Rostanga dentacus Rudman& Avern, 1989, also widesprad in the tropical western Pacific. This phylogeny suggest s a viariant origin of the Sourth African,
Atlantic-EasternPacific, and probably North Pacific species, whereas
in thetropical Indo-Pacific most sister speceis are sympatric. (Received 16 May 1999; accepted 31 July 2000) 相似文献
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Notolimea clandestina new species (Bivalvia: Limidae) is describedfrom the littoral of the Strait of Gibraltar. The small size(1 mm) and the persistence of the larval hinge suggest a neotenousspecies. Its area of distribution is likely to be restrictedto the Strait of Gibraltar. (Received 7 July 1993; accepted 2 December 1993) 相似文献
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A new genus of phyllidiid nudibranch, Reticulidia, is described.Distinguishing features are the reticulate pattern of smoothridges on the dorsum and the radially arranged, glandular discswhich make up the pharyngeal bulb. Additional features of theforegut are described and compared with other genera. The importanceof the alimentary system for the separation of genera withinthe Phyllidiidae is supported and its validity reinforced bythis new genus. One species, Reticulidia halgerda, is describedas new and differentiated from a second, sympatric species.Reticulidia is presently known from the eastern Indian Ocean,South China Sea and western Pacific Ocean.
*Present address: Australian Biological and Environmental Survey,Australian National Parks and Wildlife Service. GPO Box 1383,Canberra. ACT 2601. Australia. (Received 15 August 1989; accepted 8 January 1990) 相似文献
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曾淑英 《植物分类与资源学报》1993,15(4):1-3
本文利用形态解剖、孢粉学及化石资料,讨论了金粟兰科的系统;并对其起源、演化和现代分布格局形成等问题做了合理推测,主要结果如下:(l)Sarcandra和chloranthus的亲缘关系最接近,而Ascarina和Hedyosmum的系统位置最靠近.Sarcandra是金粟兰科中最原始的属,而Hedyosmum则是最进化的属。(2)金粟兰科可能于白垩纪最早期起源于木质部无导管的、具简单两性虫媒花的祖先,从这个祖先分化出虫媒两性花的Sarcandra和Chloranthus和风媒单性花Ascarina和Hedyosmum。(3)印度支那植物区和马来西亚植物区包含了金粟兰科的全部属和大部分原始种类,是金粟兰科的现代分布中心;也可能是其起源地。(4)金粟兰科起源较早容易扩散到各个大陆,随大陆解体而被带到各大洲。并随古气候、古地理的演变而发展或衰退、消亡而形成今天的分布格局。 相似文献
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西藏岩蜥属一新种描述:(蜥蜴亚目:鬣蜥科) 总被引:1,自引:0,他引:1
995~1996年,作者撰写《中国动物志·蜥蜴亚目》卷鬣蜥科岩蜥属(Laudakia)时,曾详细研究了中国科学院成都生物研究所两栖爬行动物研究室收藏的岩蜥属全部标本,发现其中采自西藏自治区扎达县的1号雄性标本是未经描述的新种,将其订名为西藏岩蜥(Laudakiapapenfusi)。其种名取自美国柏克利加州大学脊椎动物学博物馆TheodoreJ.Papenfus先生的姓氏。Papenfuss先生在本世纪80年代与我所合作进行我国西部两栖爬行动物分类与生态的研究,曾数次到西藏野外工作。西藏岩蜥与南亚岩蜥(Laudakiatuberculata)相近,二者的主要区别在于:(1)前者鼻鳞椭圆形,鼻孔开口于其中央;后者鼻鳞梨形,鼻孔开口于其膨大部。(2)前者上鼻鳞1枚;后者上鼻鳞2枚。(3)前者上睫脊较不发达,脊缘钝且不上翘;后者上睫脊发达,脊缘锐利且向上翘。(4)前者体背及体侧分散有多数较小浅色点斑,点斑处为普通小鳞片,体背及体侧分散的若干较大锥鳞都不位于浅色点斑处;后者体背及体侧分散有若干橘黄色圆斑,圆斑所在或为1枚大的锥鳞,或为数枚较大刺鳞,或为中央1枚大的锥鳞围以一圈小鳞,圆斑之外无刺鳞或锥鳞。 相似文献
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云南瑞香属一新种 总被引:1,自引:0,他引:1
<正> 簇花瑞香 新种 图1 Daphne fasciculiflora T. Z. Hsu, sp. nov. Species affinis D. altaica Pall. a qua inflorescentia pedunculo nullo; foliis margine revolutis, apice acuminatis; disco cupulari, margine irregulariter partitis differt. Frutex; 0.5 in altus; ramuli hornotini cinereo-fusci, leviter striati, flavescenti-tomentosi, vetustiores brunnei, glabri. Folia alterna, 相似文献
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报道了采自湖北西部地区的扁胸切叶蚁属1新种和红蚁属中国1新纪录种,即亮颚扁胸切叶蚁Vollenhovialucimandibula sp.nov.和乌尔班红蚁Myrmica urbanii Radchenko et Elmes.新种与埃氏扁胸切叶蚁V.emeryi Wheeler相似,但新种身体黑褐色,第2结节背面具密集粗糙刻点,上颚光亮无刻点.模式标本保存于湖北民族学院昆虫标本室. 相似文献
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<正> 广卵叶红花荷 罗多木 新种 Rhodoleia latiovatifolia G. A. Fu, sp. nov. A Rhodoleia stenopetala H. T. Chang, foliis lateovatis, pedunculo 2.8—4.0 cm longo, petalis 5—6 mm latis differt. Etiam affinis Rhodoleia championii Benth. Quae foliis ovatis, usque ad 6.5 cm latis, pedunculo 2—3 cm 相似文献