A new scalpellid barnacle (Cirripedia: Thoracica) from the Lower Jurassic of New Caledonia
A new scalpellid barnacle (Cirripedia: Thoracica) from the Lower Jurassic of New Caledonia
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新喀里多尼亚下侏罗统的一种新解剖刀藤壶（Cirripedia：Thoracica）
DOI：
10.1111/j.1463-6409.1984.tb00018.x
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发表时间：
1985
影响因子：
2.5
通讯作者：
J. Grant‐Mackie
中科院分区：
文献类型：
--
作者：
J. Buckeridge;J. Grant‐Mackie
橙黄黑蝇et sp.n.，一种锥旋类古腹足类，与轮足类有亲缘关系，产于北纬21°墨西哥下加利福尼亚外海深海海底热液喷口多金属硫化物矿床的烟囱和堆积物上。该壳的独特之处在于其反折生长线、强烈的前斜孔、不协调的雕塑、盘状几何形状和孔角图案的组合。与古生代真脐目和侧肢目在形态上的相似性被认为是肤浅的，而不寻常的外壳形态和外壳微观结构的简化被解释为小尺寸的进化相关性。齿舌是不寻常的，但它与东太平洋隆起热液喷口的四种未描述的帽贝状物种的rhipidoglossan齿舌有许多共同特征。据推测，适应性辐射发生在原地，晚在第三纪或第四纪，并从一个盘绕的祖先。
Melanodrymia aurantiacagen. et sp.n., a conispiral archaeogastropod of trochacean affinities, occurs on chimneys and stacks of polymetallic sulphide deposits at hydrothermal vents on the abyssal ocean floor at 21°N Latitude off Baja California, Mexico. The shell is unique in its combination of reflexed growth lines, strongly prosocline aperture, discordant sculpture, discoidal geometry and pattern of apertural angulations. The similarity in form with Paleozoic euomphalaceans and pleurotomariceans is considered superficial and the unusual shell form and simplification of shell microstructure are interpreted as evolutionary correlates of small size. The radula is unusual, but it shares many features with the rhipidoglossan radulae of four undescribed limpet‐shaped species from hydrothermal vents on the East Pacific Rise. It is hypothesized that the adaptive radiation occurredin situ, late in the Tertiary or Quaternary, and from a coiled ancestor.