期刊
INVERTEBRATE SYSTEMATICS
卷 25, 期 2, 页码 155-169出版社
CSIRO PUBLISHING
DOI: 10.1071/IS10026
关键词
-
资金
- National Science Foundation [0741450]
- Museo Nacional de Ciencias Naturales, Madrid (Consejo Superior de Investigaciones Cientificas, Spain)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET, PIP-Damborenea, Argentina)
- Division Of Environmental Biology
- Direct For Biological Sciences [0741450] Funding Source: National Science Foundation
This study reports Peruvian freshwater species of Stenostomum (Catenulida) from the upper Yurua River of the Amazon Basin. A total of 11 species were found. One of them, Stenostomum ashanika, sp. nov., is described. It can be distinguished by: a pre-pharyngeal constriction; a small cauda; a small, rounded, mobile and ventrally directed pharynx; and a tri-radiate mouth. The remaining 10 species are reviewed and illustrated; eight are first records for Peru. A preliminary phylogenetic analysis of neotropical stenostomid species based on morphological data is undertaken, including all Rhynchoscolex, Stenostomum and Myostenostomum species described for the area. The Rhynchoscolex species are basal and paraphyletic; the species of Myostenostomum are monophyletic, within the Stenostomum clade, supported by the presence of a muscular gizzard in the anterior region of the intestine. Ciliated pits and rhabdoids are synapomorphies of the Stenostomum + Myostenostomum clade. This is the first morphological study of the relationships between stenostomid species. The most relevant characters in the phylogenetic analysis are those related to cerebral brain lobes. The results also show that many of the morphological characteristics of the species under study are poorly known and should be studied in more depth.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据