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首页> 外文期刊>Annales Zoologici >A NEW MESOCYCLOPS WITH ARCHAIC MORPHOLOGY FROM A KARSTIC CAVE IN CENTRAL VIETNAM, AND ITS IMPLICATIONS FOR THE BASAL RELATIONSHIPS WITHIN THE GENUS
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A NEW MESOCYCLOPS WITH ARCHAIC MORPHOLOGY FROM A KARSTIC CAVE IN CENTRAL VIETNAM, AND ITS IMPLICATIONS FOR THE BASAL RELATIONSHIPS WITHIN THE GENUS

机译：越南中部一个岩溶洞穴中一个具有古代形态的新交织带及其对属内基础关系的启示

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摘要

A new stygobitic cyclopoid species, Mesocyclops sondoongensis sp. nov. is described from caves in central Vietnam. This is the first cave-dwelling representative of Mesocyclops in SE Asia. Conspicuous features of the new species, such as the narrow lateral arms of the seminal receptacle and the presence of medial spine on leg 1 basipodite, are only shared with the rarus-group in the Paleotropics, but common among the Neotropical representatives. Surface ornamentation of the labrum is similar to that in the Middle American reidae-clade, a basal lineage in Mesocyclops. The basal relationships within Mesocyclops are re-examined herein. Strict consensus tree shows that: i. M. sondoongensis and the rarus-group constitute a clade, which is the sister to all Mesocyclops exclusive of the reidae-group; ii. the Neotropical species and M. edax (North and Middle America) constitute a clade, which is the sister to all Mesocyclops lacking medial spine on leg 1 basipodite and distributed mainly in the Paleotropics. Branching sequence of the trees might be congruent with: i. origin of the genus in Northern Tropical Gondwana, ii. origin of the clade (M. sondoongensis, rarus-group) in India-Madagascar, and dispersal from India to SE Asia in the Eocene when India collided with Asia; iii. New World-Old World vicariance during separation of northern South America from Africa in the Cretaceous.
机译：一个新的定发型的摆线菌种，Mesocyclops sondoongensis sp。十一月是从越南中部的洞穴描述的。这是东南亚中微循环系统的第一个洞穴居住代表。新物种的显着特征，例如精囊的窄侧臂和第1条蛇纹石的内侧脊柱的存在，仅在古热带与罗鲁斯族共有，但在新热带代表中很常见。唇唇的表面装饰与中美洲生殖器科（Mesocyclops）的基础谱系相似。 Mesocyclops内的基础关系在此重新检查。严格的共识树表明：i。 sondoongensis和rarus-group组成了一个进化枝，是所有Mesocyclops的姐妹（不包括reidae-group）。 ii。新热带物种和M. edax（北美洲和中美洲）构成了一个进化枝，是所有Mesocyclops的姊妹，Mesocyclops的第1条蛇纹石缺乏中间脊柱，主要分布在古近系。树的分支顺序可能与以下内容一致：属起源于北部热带冈瓦纳，ii。进化枝（M. sondoongensis，rarus-group）的起源在印度-马达加斯加，当印度与亚洲碰撞时，从印度向始新世扩散到东南亚。 iii。白垩纪南美洲北部与非洲分离期间的新旧世界变迁。

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