taxonID	type	description	language	source
03EB87920430FFE9FF0DD4ADFC3563ED.taxon	description	Description: LM: Frustules biraphid. Girdle views retangular, often forming short chains (Figs 24 – 27). Girdle views can be observed in the accumulations of silicate. Valves broadly elliptical with broadly rounded, not protracted ends. Length 11 – 20 µm, breadth 5.5 – 7.9 µm. Raphe branches appear somewhat diffuse lying in a lanceolate axial area. Central area elliptic, about 1 / 2 the width of the valve. Central pores on the valve outside (focus) conspicuously widely spaced. Below the surface, slightly displaced distally from the central raphe ends, appear two dark spots. Transapical striae are very coarse, 7 – 8 in 10 µm. Striae rather strongly radiate becoming more radiate towards the valve ends. Areolae are not discernible in LM view. SEM: external view (Figs 36 – 45: Valve faces (fronts) strongly domed, continual transition to the mantle. Raphe slits noticeably broad with short terminal fissures deflected to the secondary side (sometime indistinct) running into a small circular groove (Figs. 42 – 45). Central ends of the raphe curve to the primary side into very large, crater-like grooves (Fig. 39). Transapical striae consist of three to mostly four series of circular open areola foramina separated by broad interstriae. A group of pores can be seen at each apex, and they appear physically undifferentiated from the areolae (Figs. 41 – 44). Areolar density is 40 – 50 in 10 µm. Spines or differentiated apical pore fields lacking. The girdle consists of one or two narrower, unperforated copulae (Fig. 37). Internal SEM view (Figs. 46 – 56): Transapical costae form a rather high relief between the alveoli. At the apices, the pores there appear occluded, similar to what is seen in apical pore fields in freshwater gomphonemoid diatoms and apical pore field-bearing cymbelloid diatoms. The central raphe ends are masked by a silica flap, no intermissio visible. Two elliptic cavities below the flaps are connected with narrow canals in the two peculiar appendices which protrude “ pervalvar ” into the valve interior. These appendices have a spongeous consistency lying on the primary valve side and make the valve interior asymmetrical consequently.	en	Wu, Han, Zhang, Teng-Zhong, Li, Yan-Ling, Metzeltin, Ditmar, Lange-Bertalot, Horst, Kociolek, John Patrick (2020): Sichuaniella deqinensis sp. nov., a new diatom species (Bacillariophyceae) from a high altitude lake in the Hengduan Mountains, SW China. Phytotaxa 449 (1): 83-89, DOI: 10.11646/phytotaxa.449.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.449.1.8
03EB87920430FFE9FF0DD4ADFC3563ED.taxon	materials_examined	Type: — CHINA. Yunnan Province: Xianggelila City, Gaoligong Mountain, Lake Deqin 5, 28 ° 30 ’ 15.75 ’’ N, 98 ° 59 ’ 26.58 ’’ E, elevation 4734 m a. s. l., samples collected by Dr. Yulan, Luo, 14 October 2017. Holotype Deqin 5 - 1 in Coll. Li Yanling, Yunnan University., Kunming, China. Figure 1 is of the holotype.	en	Wu, Han, Zhang, Teng-Zhong, Li, Yan-Ling, Metzeltin, Ditmar, Lange-Bertalot, Horst, Kociolek, John Patrick (2020): Sichuaniella deqinensis sp. nov., a new diatom species (Bacillariophyceae) from a high altitude lake in the Hengduan Mountains, SW China. Phytotaxa 449 (1): 83-89, DOI: 10.11646/phytotaxa.449.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.449.1.8
03EB87920430FFE9FF0DD4ADFC3563ED.taxon	etymology	Etymology: — The specific epithet ‘ deqinensis’ refers to the locality from which the new species was described.	en	Wu, Han, Zhang, Teng-Zhong, Li, Yan-Ling, Metzeltin, Ditmar, Lange-Bertalot, Horst, Kociolek, John Patrick (2020): Sichuaniella deqinensis sp. nov., a new diatom species (Bacillariophyceae) from a high altitude lake in the Hengduan Mountains, SW China. Phytotaxa 449 (1): 83-89, DOI: 10.11646/phytotaxa.449.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.449.1.8
03EB87920430FFE9FF0DD4ADFC3563ED.taxon	biology_ecology	Ecology Sichuaniella deqinensis is known only from Lake Deqin 5, a high-altitude freshwater lake situated at 4734 m a. s. l. with slightly alkaline pH (8.22), conductivity (125 μS / cm) and high water transparency (Secchi depth) 7. 2 m. In Lake Deqin 5, at depth of 12.7 m, this species was associated with Achnanthidium minutissimum (Kützing) Czarnecki (Czarnecki 1994: 157) (27.6 %), Staurosira venter (Ehrenberg) Cleve & Möller (1877: 242) (29.7 %), Staurosira construens Grunow (1843: 424) (4.4 %), Encyonema minutum (Hilse) Mann (Round et al. 1990: 167) (2.7 %), and several at present unidentified species of Fragilaria, Nitzschia and Cymbella.	en	Wu, Han, Zhang, Teng-Zhong, Li, Yan-Ling, Metzeltin, Ditmar, Lange-Bertalot, Horst, Kociolek, John Patrick (2020): Sichuaniella deqinensis sp. nov., a new diatom species (Bacillariophyceae) from a high altitude lake in the Hengduan Mountains, SW China. Phytotaxa 449 (1): 83-89, DOI: 10.11646/phytotaxa.449.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.449.1.8
