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Horologinella属最初的定义包含小个体的和具特有的滴漏器形的微体化石。归到该属的不同类型可分成形态构造不同的两类:具板式和非板式类型,进一步证实了在Horologinella属的分类上颇混乱的情形。在本组合中,具板式类型极少见,与这类孢粉类型有关的形态学、地层分布及古环境特征的资料非常少见。文中描述了中西伯利亚北部阿纳巴尔湾早日垩世的H.anabarensis Pestchevitskaya的许多保存良好的标本,利用这些保存良好的标本可以研究Horologinella类型的详细板式形态。前、后腰区和顶区的反映板式及第一块顶板片的对应位置和反映纵沟的构造,说明Horologinella具板式的类型与膝沟藻目的沟鞭藻囊孢,尤其是与瑞提膝沟藻亚目的分子有很密切的关系。古生物学和孢粉学的资料显示H.anabarensis和有利于微体浮游植物组合发育的浅海环境有关。
The original definition of Horologinella contains small individual and peculiar molluscic fossils. The different types that belong to this genus can be divided into two categories with different morphological configurations: plate and non-plate types, further confirming the chaos in the classification of the genus Horologinella. In this assemblage there are very few examples of plate types and morphological, stratigraphic and paleoenvironmental characteristics associated with this type of sporopollen. The article describes many well-preserved specimens of the H.anabarensis Pestchevitskaya from the Early Cretaceous of the Gulf of Anaba in northern Central Siberia. Using these well-preserved specimens, the detailed plate morphology of the Horologinella type can be studied. The positions of the front plate, the back plate and the top plate reflecting the plate and the first top plate and the configuration reflecting the longitudinal groove indicate that Horologinella has a plate type and a Kochia sp. Chlorella sub-molecular has a very close relationship. Paleontology and palynology data show that H.anabarensis is associated with a shallow sea environment that favors the development of microscopic phytoplankton assemblages.