Ecosystem-Based Management of Marine Resources Program, Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, P.O. BOX 1638, Salmiya, 22017, Kuwait.
IFREMER, LER BO, Station de Biologie Marine, Place de la Croix, F-29900, Concarneau, France.
J Phycol. 2019 Feb;55(1):84-103. doi: 10.1111/jpy.12783. Epub 2018 Nov 19.
A new thecate, photosynthetic, sand-dwelling marine dinoflagellate, Laciniporus arabicus gen. et sp. nov., is described from the subtidal sediments of the Omani coast in the Arabian Sea, northern Indian Ocean, based on detailed morphological and molecular data. Cells of L. arabicus are small (16.2-30.1 μm long and 13.1-23.2 μm wide), dorsoventrally compressed, with a small apical flap-shaped projection pointing to the left. The thecal plate pattern is distinguished by minute first precingular plate and sulcus, which extends into the epitheca, with large anterior and right sulcal plates. The Kofoidian thecal tabulation is Po, X, 4', 2a, 7'', 6c, 6s, 5''', 2''''. Morphologically, the revealed plate pattern has an affinity to the Peridiniales, and LSU rDNA based phylogenetic analyses placed L. arabicus within the Thoracosphaeraceae, close to calcareous-cyst producing scrippsielloids, predatory pfiesteriaceans, and photosynthetic freshwater peridinioids Chimonodinium lomnickii and Apocalathium spp. However, the thecal plate arrangement of L. arabicus differs noticeably from any currently described dinoflagellates, and the species stands out from closely related taxa by extensive differences in physiology and ecology.
一种新的具囊、光合作用、沙栖海洋甲藻，Laciniporus arabicus gen. et sp. nov.，基于详细的形态学和分子数据，从阿拉伯海、北印度洋阿曼海岸的潮间带沉积物中描述。L. arabicus 的细胞很小（长 16.2-30.1μm，宽 13.1-23.2μm），背腹压扁，有一个指向左侧的小顶片状突起。壳板模式的特征是微小的第一前领板和沟，延伸到上锥部，有大的前和右沟板。Kofoidian 壳板排列为 Po，X，4'，2a，7''，6c，6s，5'''，2''''。形态上，揭示的板模式与 Peridiniales 有亲缘关系，基于 LSU rDNA 的系统发育分析将 L. arabicus 置于 Thoracosphaeraceae 内，靠近产生钙质囊的 scrippsielloids、捕食性 pfiesteriaceans 和光合作用的淡水 Peridinioids Chimonodinium lomnickii 和 Apocalathium spp.。然而，L. arabicus 的壳板排列与任何目前描述的甲藻明显不同，该物种在生理和生态上与密切相关的分类群存在显著差异。
