The enigmatic Alpine opilionid Saccarella schilleri gen. n., sp. n. (Arachnida: Nemastomatidae)—isolated systematic placement inferred from comparative genital morphology
The enigmatic Alpine opilionid Saccarella schilleri gen. n., sp. n. (Arachnida: Nemastomatidae)—isolated systematic placement inferred from comparative genital morphology
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DOI：
10.1007/s13127-012-0073-7
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发表时间：
2012-02
影响因子：
1.6
通讯作者：
Axel L. Schönhofer;J. Martens
中科院分区：
文献类型：
--
作者：
Axel L. Schönhofer;J. Martens
在阿皮利昂内斯中，雄性生殖器形态在系统学和理解该群体的进化中发挥着关键作用，因为功能修饰通常勾勒出更高的分类水平。在线虫科中，阴茎干茎上不同的侧向稳定结构是独立发育的。这些翼状突起充当两个肌腱的锚点，传统上被解释为通用特征。来自意大利西北部利古里亚阿尔卑斯山的萨卡雷洛山的一种新发现的物种的独特之处在于，它通过短而窄的侧向褶皱提供锚定点，作为龟头下方的远端干杖的稳定部分。为了将这一不寻常的物种归入线虫科，我们必须重新评估雄性生殖器形态学和该科系统学中使用的其他特征的有用性。由此产生的系统发育框架补充了可用的分子遗传数据。基于这两个数据集，创建一个新属似乎是合理的。Saccarella scillerigen。名词sp。名词随后描述并进一步定义。我们讨论了西南阿尔卑斯山收割者动物群的特有现象和生物地理学，讨论了这个神秘的属。
In Opiliones, male genital morphology plays a key role in systematics and understanding the evolution of the group because functional modifications often outline higher taxonomic levels. In Nemastomatidae, different lateral stabilizing structures on the penial truncus cane developed independently. These wing-like protuberances serve as anchor points for two muscular tendons and are interpreted traditionally as generic characters. A newly discovered species from Monte Saccarello in the Ligurian Alps of North-western Italy is unique in providing anchor points as stabilizing parts of the distal truncus cane below the glans by short and narrow lateral folds. To place this unusual species within the Nemastomatidae one must re-evaluate the usefulness of male genital morphological and other characters used in the systematics of the family. The resulting phylogenetic framework is supplemented with available molecular genetic data. Based on both datasets, the creation of a new genus seems justified.Saccarella schillerigen. n. sp. n. is subsequently described and further defined. The endemism and biogeography of the harvestmen fauna in the South-western Alps are discussed with respect to this enigmatic genus.