A new species of the genus Spiroxys (Nematoda; Spiruroidea) from Australian chelonians of the genus Chelodina (Chelidae)
A new species of the genus Spiroxys (Nematoda; Spiruroidea) from Australian chelonians of the genus Chelodina (Chelidae)
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DOI：
10.1007/bf00010162
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发表时间：
2004
影响因子：
1.3
通讯作者：
G. Berry
中科院分区：
文献类型：
--
作者：
G. Berry
龟螺环虫sp.在澳大利亚的淡水龟类中有3种，长颈盘龟Chelodina longicollis，长颈盘龟C. expansa和C.新几内亚发现的一种淡水龟类。Chelodinae与该属的其他物种的不同之处在于具有假唇，每个假唇在中叶上具有钝的、突出的表皮突起（齿），并且没有其他表皮突起，没有刺或突起的表皮领，以及具有管状的引带，骨针穿过该管状引带。幼虫（可能是S. Chelodinae）也被描述。这是螺旋菌属spiroxyssp的首次记录。来自澳大利亚地区，和来自一个宿主群（侧耳亚目），它具有冈瓦纳分布。这是讨论有关的属Spiroxysand的动物地理学，它被假定为澳大利亚的螯获得这种寄生虫从非海洋cryptodires（可能carettochelyids或trionychids）。此外，还报道了螺旋菌属（Spiroxyssp.）是在尼日利亚发现的，是在埃塞俄比亚地区发现的第一个此类记录。它被发现在Pelusius subniger，从而构成了第二个记录的spiroxysspecies在pleurodire。
Spiroxys chelodinaen. sp. is described from Australia in three species of freshwater chelonian,Chelodina longicollis, C. expansaandC. oblongaand from New Guinea in an unidentified freshwater chelonian.S. chelodinaediffers from other species of the genus in having pseudolabia each with a blunt, prominent, cuticular projection (tooth) on the middle lobe and no other cuticular prominences, a cuticular collar without spines or protrusions, and a gubernaculum with tubes through which the spicules pass. Larvae (probably fourth-stage larvae ofS. chelodinae) are also described. This is the first record of aSpiroxyssp. from the Australian Region, and from a host group (suborder Pleurodira), which has a Gondwana distribution. This is discussed in relation to the zoogeography of the genusSpiroxysand it is postulated that Australian chelids acquired this parasite from non-marine cryptodires (possibly carettochelyids or trionychids). In addition, aSpiroxyssp. is recorded from Nigeria, constituting the first such record from the Ethiopian Region. It was found inPelusius subniger, thus constituting the second record of aSpiroxysspecies in a pleurodire.