EVOLUTIONARY HISTORY OF CESTODE ORDER PROTEOCEPHALIDEA
EVOLUTIONARY HISTORY OF CESTODE ORDER PROTEOCEPHALIDEA
复制标题
DOI：
10.2307/2412882
复制
发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
BROOKS, DR
中科院分区：
文献类型：
--
作者：
BROOKS, DR
Based on a framework of cladistic (genealogical) relationships, the morphological, zoogeographical, and host relationships of the genera comprising the cestode order Proteocephalidea parasitic in fish, amphibians and reptilians are examined. The new supra-specific classification scheme proposed differs only slightly from previous classifications. Zoogeographically, the proteocephalideans consist of 1 family endemic to South America and another exhibiting intercontinental patterns of vicariance. The dispersal-tracks of the 2nd family are consistent with those of ostariophysan fishes, primary hosts for proteocephalideans. Most proteocephalidean genera, including the most primitive and the most specialized, occur in South America. The greatest concentration of species belonging to the most primitive genus occurs in the Northern Hemisphere where the fewest proteocephalidean genera occur. Proteocephalideans are postulated to have originated in South America. In the Southern Hemisphere, all but 4 piscine hosts are siluriforms, while in the Northern Hemisphere a great diversification of hosts has occurred. An hypothesis of the evolution of the host-parasite relationships of non-piscine proteocephalideans is proposed to explain observed patterns of host relationships. Zoogeographical and host relationships do no contradict the phylogenetic model based on characters of adult morphology. Additional support for the hypothesis that the cestode order Cyclophyllidea is di- or polyphyletic and derived from proteocephalidean ancestors is presented.
