Recent extinct land snails (Euconulidae) from the Gambier Islands with remarkable apertural barriers
Recent extinct land snails (Euconulidae) from the Gambier Islands with remarkable apertural barriers
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DOI：
10.1353/psc.2001.0011
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发表时间：
2001-04-01
期刊：
影响因子：
0.7
通讯作者：
Abdou, Ahmed
中科院分区：
文献类型：
--
作者：
Bouchet, Philippe;Abdou, Ahmed
根据 1934 年 Mangarevan 探险队和 1997 年在甘比尔群岛（波利尼西亚东部）收集的材料的研究，两种特有的真蜥科物种在个体发育和发育方面都表现出与任何其他太平洋岛屿蜥蜴不同的孔径屏障。这些屏障仅在青少年和亚成体中完全发育，并在成年个体中被吸收。 Aukena 迄今为止被认为是夏威夷-波利尼西亚 Hiona 属的一个亚属，现已升级为属。 Aukena 牙髓，n。描述了具有六个孔屏障（一个小柱、三个顶叶、两个腭）的 A. tridentata（Baker，1940）。到 1934 年，甘比尔群岛的自然环境已发生严重改变，奥科纳的两种特有物种被认为已经灭绝。另一种没有孔径屏障的特有真鳅科动物 Philonesia mangarevae Baker, 1940，生存在 Mokoto 山脚下的一小片原生森林中。
Based on study of material collected in the Gambier Islands (eastern Polynesia) by the 1934 Mangarevan Expedition and in 1997, two endemic species of Euconulidae are shown to exhibit apertural barriers unlike those of any other Pacific island limacoids, both in their ontogeny and development. The barriers are fully developed only in juveniles and subadults and are resorbed in full-grown individuals. Aukena, hitherto considered a subgenus of the Hawaiian-Polynesian genus Hiona, is elevated to genus rank. Aukena endodonta, n. sp., with six apertural barriers (one columellar, three parietal, two palatal), is described, and A. tridentata (Baker, 1940) is redescribed. The natural environment of the Gambier Islands had already been severely altered by 1934, and the two endemic species of Aukena are considered extinct. One other endemic euconulid without apertural barriers, Philonesia mangarevae Baker, 1940, survives in a small patch of native forest at the base of Mount Mokoto.