Ultrastructural differences in presumed photoreceptive organs and molecular data as a means for species discrimination in Polygordius (Annelida, Protodriliformia, Polygordiidae)
Ultrastructural differences in presumed photoreceptive organs and molecular data as a means for species discrimination in Polygordius (Annelida, Protodriliformia, Polygordiidae)
复制标题
假定的感光器官和分子数据的超微结构差异作为Polygordius(环节动物、Protodriliformia、Polygordiidae)物种区分的手段
DOI:
10.1007/s13127-016-0272-8
复制
发表时间:
2016
影响因子:
1.6
通讯作者:
Purschke
中科院分区:
文献类型:
--
作者:
Lehmacher;Ramey-Balci;Purschke
Members of Polygordiidae Czerniavsky, 1881 are distributed worldwide and are typical inhabitants of coarse grained, marine sublittoral sediments. Species in Polygordiidae are unusual among polychaetes because they lack external segmentation, parapodia, and chaetae as well as external ciliation. Morphological characters for species distinction are thus limited to the shape and minute structures of the prostomium and pygidium. As a result, morphological identification and description of thePolygordiusspecies is difficult. In the present study, we provide new data for species distinction using molecular and morphological methods, i.e., DNA-sequencing (COIgene), transmission electron microscopy (TEM), and confocal laser scanning microscopy (cLSM). Specifically, we investigated whether the photoreceptor-like sense organs, previously described forPolygordius appendiculatusFraipont, 1887, could provide additional characters of taxonomic value by examining the ultrastructure of these organs in two additional species,Polygordius erythrophthalmusGiard, 1880 andPolygordius lacteusSchneider, 1868. These organs were found to occur in comparatively large numbers and comprise different types of sensory cells including one rhabdomeric and two ciliary, which are variously combined to form small sensory organs. Structural differences in sensory organs were negligible betweenP. erythrophthalmusandP. lacteus; however, major differences were observed when compared toP. appendiculatus. These results are in accordance with our molecular data which indicated thatP. erythrophthalmusandP. lacteusrepresent the same species. ThusP. erythrophthalmusis an invalid species and represents a junior synonym ofP. lacteus. Furthermore, this study shows that ultrastructural data can significantly contribute to species distinction, especially in morphologically similar species.
登录
查看更多内容
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Westheide;Hass‐Cordes
通讯作者:
Hass‐Cordes
影响因子:
1.5
作者:
M. Heethoff;R. A. Norton
通讯作者:
R. A. Norton
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
W. Westheide;G. Purschke;K. Middendorf
通讯作者:
K. Middendorf
DOI:
10.24199/j.mmv.2014.71.19
发表时间:
2014
期刊:
Memoirs of the Museum of Victoria
影响因子:
--
作者:
Purschke G;Bleidorn C;Struck T.H.
通讯作者:
Struck T.H.
影响因子:
1.2
作者:
E. Vortsepneva;A. Tzetlin;G. Purschke;N. Mugue;E. Hass;A. Zhadan
通讯作者:
A. Zhadan