Dactylodinium pterobelotum gen et sp. nov., a new marine woloszynskioid dinoflagellate positioned between the two families Borghiellaceae and Suessiaceae
Dactylodinium pterobelotum gen et sp. nov., a new marine woloszynskioid dinoflagellate positioned between the two families Borghiellaceae and Suessiaceae
复制标题
Dactylodinium pterobelotum gen et sp.
DOI：
10.1111/jpy.12575
复制
发表时间：
2017
影响因子：
2.9
通讯作者：
Y. Fukuyo and M. Iwataki
中科院分区：
文献类型：
--
作者：
K. Takahashi;O. Moestrup;M. Wada;A. Ishimatsu;Nguyen V.N.;Y. Fukuyo and M. Iwataki
一种新的海洋狼牙藻Dactylodium pterobelotumgenET sp.Nov.，采自越南南部河口，经光镜、扫描电子显微镜和透射电子显微镜观察，并根据rDNA序列推测其分子系统发育关系。该种在狼尾类甲藻中具有最少数量的两栖小泡(5个纬度系列)，归入狼尾草科和博格希尔科。眼斑为B型，由嗜奥斯球和砖状物质组成，分别位于叶绿体内和叶绿体外。顶端结构由一对细长的前囊泡(PEV)组成。一个大的花序梗很明显，位于上圆锥体的沟延伸处，由一条约140根微管组成的微管束支撑。毛囊的超微结构特征代表了Dinophyceae中的一种新类型，除前纤维外，还具有侧毛。基于部分LSU rDNA的分子系统发育分析表明，该种在鹅膏科中处于基生位置，这表明该种的B型和PEV型斑点是斑点的祖先状态，该斑点由砖状物质(E型)和细长的顶端小泡组成。
A new marine woloszynskioid dinoflagellateDactylodinium pterobelotumgen. et sp. nov., collected from a southern Vietnamese estuary, was described on the basis of LM, SEM, and TEM, and molecular phylogeny inferred from rDNA sequences. This species had the smallest number of amphiesmal vesicles (5 latitudinal series) in woloszynskioid dinoflagellates assigned to the Suessiaceae and Borghiellaceae. The eyespot was of type B, composed of osmiophilic globules and brick‐like material, located in‐ and outside of the chloroplast respectively. An apical structure comprised a pair of elongate anterior vesicles (PEV). A large peduncle was conspicuous, located in the sulcal extension in the epicone, and supported by a microtubular strand of ~140 microtubules. Ultrastructural features of trichocysts represent a novel type in the Dinophyceae, bearing lateral hairs besides anterior fibers. The molecular phylogeny based on partial LSU rDNA showed the species in a basal position in the family Suessiaceae; this indicates the eyespot type B and PEV of the Borghiellaceae are ancestral states of the eyespot comprising brick‐like material (type E) and an elongate apical vesicle of the Suessiaceae.