identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
C6855D2C97325CFB966212880C942FD4.text	C6855D2C97325CFB966212880C942FD4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mayamaea densestriata Du & Wei & Li & Xu & Li & Zhang 2025	<div><p>Mayamaea densestriata sp. nov.</p><p>Fig. 1, Table 2</p><p>Description.</p><p>In LM (Fig. 1 A – G), valves small, elliptic to linear elliptic, with pronounced sternum and broadly rounded apices, 7.6–9.0 μm in length and 3.4–4.8 μm in width (n = 20). Raphe narrow, straight. Axial area lanceolate, broad towards valve center, fusing with transverse expanded central area. Central area wide, irregular, bordered on each margin by 7–10 shortened striae. The striae radiate throughout, 32–40 in 10 μm.</p><p>In SEM (Fig. 2), internally, raphe linear with thick distinct sternum (Fig. 2 A). Central raphe endings slightly deflected to the same side of the valve (Fig. 2 B). Distal raphe fissures terminated in small helictoglossae (Fig. 2 C). Areolae small and round. Striae composed of 2–9 areolae. Central area wide. Externally, proximal raphe ends expanded and pore-like, surround by a shallow grove and slightly deflected in one direction (Fig. 2 D, E). Terminal fissures bend markedly to the opposite direction of the proximal ends (Fig. 2 F). Areolae small, round, and occluded by hymens. Striae composed of 6–8 round areolae and extended slightly onto the shallow margin of the valve.</p><p>Holotype.</p><p>The holotype is represented by the specimen illustrated in Fig. 1. The slide MBMCAS 288335 is deposited in the Marine Biological Museum, Chinese Academy of Sciences (MBMCAS), Qingdao, China .</p><p>nd = not documented.</p><p>Type locality.</p><p>Surface of moist agricultural soil (35°05.40'N, 114°08.59'E) in Yuanyang County, Henan Province, China. The type material was collected by Feichao Du on 10 May 2024.</p><p>Etymology.</p><p>The specific epithet Mayamaea densestriata refers to the unusually high number of areolae per stria observed in this species. It highlights a key diagnostic feature that distinguishes it from its morphologically similar congeners.</p><p>Distribution and ecology.</p><p>Mayamaea densestriata is currently known only from its type locality. It is a terrestrial species associated with moist soil environments within cultivated agricultural landscapes.</p><p>Gene sequences.</p><p>The two sequences of Mayamaea densestriata have been deposited in the GenBank (SSU rDNA: PV 733928, rbc L: PV 740453).</p><p>PhycoBank registration.</p><p>http://phycobank.org/105610</p><p>Molecular phylogenetic analyses</p><p>The BLASTn search results showed that the SSU rDNA sequence of Mayamaea densestriata shares 89.37 % identity with M. permitis (GenBank accession PV 156110), while the rbc L gene exhibits 91.50 % identity with M. atomus var. permitis (JN 418670). Phylogenetic analyses based on concatenated SSU rDNA and rbc L genes place M. densestriata firmly within the well-supported clade comprising all currently recognized Mayamaea species (Fig. 3). Within this clade, M. densestriata occupies an independent branch and is placed at the basal position relative to a subclade including M. terrestris, M. pseudoterrestris, M. arida, M. vietnamica, M. atomus var. atomus, M. permitis, M. atomus, M. fossalis var. fossalis, and M. atomus var. permitis (ML = 92, BI = 0.68). Together, they are resolved as the sister to another Mayamaea subclade, including M. sweetloveana and M. ectorii with high support (ML = 100, BI = 1.00). The clade of Mayamaea is resolved as the sister group to a clade composed of Pinnularia Ehrenberg and Caloneis Cleve species (ML = 99, BI = 1.00), forming a monophyletic lineage of the family Pinnulariaceae .</p></div>	https://treatment.plazi.org/id/C6855D2C97325CFB966212880C942FD4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Du, Fei-Chao;Wei, Na;Li, Hao-Yu;Xu, Zhen-Quan;Li, Yu-Hang;Zhang, Man	Du, Fei-Chao, Wei, Na, Li, Hao-Yu, Xu, Zhen-Quan, Li, Yu-Hang, Zhang, Man (2025): Morphology and molecular phylogeny of Mayamaea densestriata sp. nov. (Bacillariophyceae), a new terrestrial species from Henan Province, China. PhytoKeys 268: 33-44, DOI: 10.3897/phytokeys.268.171181
