A small and rare (low in abundance) Achnanthales that was first discovered in the Kerguelen Archipelago (Austral Ocean), was subsequently found in the Mascarenes and Scattered Islands (Indian Ocean), and more recently in Nuku Hiva (Marquesas, South Pacific). This marine benthic taxon, first incorrectly identified as Cocconeis reticulata var. deceptionis Frenguelli & H.A.Orlando, is here described as Cocconeis carinata sp. nov. due to its unique features. The scarcity and small size of this diatom render its description difficult under light microscopy, while scanning electron microscopy allows a more detailed description. Cocconeis carinata sp. nov., a sternum valve of which was probably illustrated from the Florida Keys by Montgomery (1978), is a ubiquitous epiphyte and epipsammic taxon. The new taxon has some similarities with Cocconeis nitens Edsbagge, a taxon that is here typified, but with some differences in the stria density on both valves. A re-examination of the historic slides from which C. reticulata var. deceptionis and C. orbicularis Frenguelli & H.A.Orlando were described, leads to the conclusion that the former is a heterotypic synonym of the latter and, due to its complex structure, that C. orbicularis should be transferred to a more suitable genus.

中文翻译：

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Cocconeis carinata sp. 十一月 (Bacillariophyceae) 和 Cocconeis orbicularis Frenguelli & HAOrlando 和 Cocconeis reticulata var. 的复检。deceptionis Frenguelli & HAOrlando

一种小而稀有（丰度低）的棘爪目，最初在凯尔盖朗群岛（澳大利亚）中被发现，随后在马斯卡内斯群岛和散布群岛（印度洋）中被发现，最近又在努库希瓦（南太平洋马克萨斯）被发现。这种海洋底栖分类群，首先被错误地识别为 Cocconeis reticulata var。deceptionis Frenguelli & HAOrlando，这里被描述为 Cocconeis carinata sp。十一月 由于其独特的功能。这种硅藻的稀缺性和小尺寸使其在光学显微镜下难以描述，而扫描电子显微镜可以进行更详细的描述。Cocconeis carinata sp. 11 月，Montgomery (1978) 可能从佛罗里达群岛描述了它的胸骨瓣，它是一种无处不在的附生植物和附生类群。新分类群与 Cocconeis nitens Edsbagge 有一些相似之处，这里是一个典型的分类群，但在两个瓣膜上的条纹密度有一些差异。重新检查 C. reticulata var. 的历史幻灯片。deceptionis 和 C. orbicularis Frenguelli & HAOrlando 进行了描述，得出的结论是前者是后者的异型同义词，并且由于其复杂的结构，C. orbicularis 应该转移到更合适的属中。