New insights into the association between epizoic diatoms and the sea turtle Chelonia mydas: new Mastogloia taxon (Bacillariophyceae) from Iran

IF 1.5 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Phycologia Pub Date : 2023-03-31 DOI:10.1080/00318884.2023.2184126

C. Pennesi, T. Romagnoli, M. Mutalipassi, M. de Stefano, S. Greco, C. Totti

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引用次数: 0

Abstract

ABSTRACT Two epizoic species of Mastogloia, one of them a new taxon, have been found for the first time growing on the carapace of sea turtle Chelonia mydas from the Strait of Hormuz (Iran). Before this work, taxa belonging to the genus Mastogloia had never been identified as epibionts of C. mydas. The cleaned material of diatoms, collected from turtle carapaces was studied by light (LM) and scanning electron microscopy (SEM). Mastogloia hormuzensis sp. nov. is elliptical to linear-elliptical in valve view with rounded to slightly rostrate apices. Partecta are of different size and shape, with the larger one at the centre, and there is a very short partectal flange. The new epizoic diatom is unique in its morphology, and can be compared with Mastogloia exigua and M. pusilla, which show a similar combination of characters (e.g. the shape of areolae, type of partectal ring). Mastogloia hormuzensis sp. nov. fits into Hustedt’s species group Inaequales, to which it adds the feature of having a very short partecta flange. A second species, Mastogloia paradoxa, was also found living as epizoic for the first time.

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对新生代硅藻和海龟Chelonia mydas之间联系的新见解：来自伊朗的Mastogloia新分类单元（Bacillarophyceae）

摘要在霍尔木兹海峡（伊朗）海龟Chelonia mydas的甲壳上首次发现了Mastogloia的两个新生代物种，其中一个是新的分类单元。在这项工作之前，属于Mastogloia属的分类群从未被确定为C.mydas的表生生物。采用光镜（LM）和扫描电子显微镜（SEM）对从龟甲中采集的硅藻清洁材料进行了研究。Mastogloia hormuzensis sp.nov.在瓣膜视图中为椭圆形至线性椭圆形，顶端圆形至略具喙。直肠有不同的大小和形状，较大的在中心，并且有一个很短的直肠凸缘。新生代硅藻在形态上是独特的，可以与出口Mastogloia exigua和脓疱M.pusilla进行比较，它们表现出相似的特征组合（例如乳晕的形状、直肠环的类型）。Mastogloia hormuzensis sp.nov.属于Hustedt的物种群Inequales，它增加了具有非常短的部分凸缘的特征。第二个物种，Mastogloia paradoxa，也首次被发现以新生代的身份生活。

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来源期刊

Phycologia 生物-海洋与淡水生物学

CiteScore

3.10

自引率

18.80%

发文量

审稿时长

3 months

期刊介绍： Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.