Pleopsidium discurrens (Zahlbr.) Obermayer

Ai, Min, Miao, Cong Cong, Worthy, Fiona Ruth, Nurtai, Lazzat, Zhang, De Ning, Zhang, Sheng Bang, Han, Gui Lan, Wang, Li Song & Wang, Xin Yu, 2025, A new revision of the lichen genus Pleopsidium (Acarosporales, Acarosporaceae) in China reveals two new species, MycoKeys 120, pp. 255-276 : 255-276

Pleopsidium discurrens (Zahlbr.) Obermayer , Annales Botanici Fennici 33 (3): 232 (1996)

Fig. 8

≡ Acarospora (sect. Pleopsidium) discurrens A. Zahlbr. in Handel-Mazzetti, Symbolae Sinicae, Pars III: 140-141, 1930. 1

Ind Loc.

“ China. Prov. Yünnan [= Yunnan] bor. - occid.: In montis Yülung-schan prope urbem Lidjiang (“ Likiang ”) regione alpina, ad rupes inter pratum Latuka et alveum Schitako. Substr. schisto argilloso, alt. s. m. ca. 4000 m, leg. 20.Vll.1914, Dr. Heinr. Frh. v. Handel-Mazzeni. (Diar. Nr. 676). det. Zahlbruckner Nr. 4297. (lectotype: WU; isolectotype: W) ”.

Note.

Pleopsidium discurrens was described from Yulong Snow Mountain of Yunnan and Sichuan and then later also found in Xizang ( Zahlbruckner 1930; Obermayer 1996). It was defined as having typical ribbon-like, elongate, branched, and spreading lobes (Fig. 8 B ). However, in combination with molecular systematics, this species shows extensive intraspecific morphological variation (Fig. 8 ). The specimens from northwestern Yunnan often have typical lobes (Fig. 8 A, B ), while lobes of specimens from Xizang are non-branched (Fig. 8 E, F ).

Selected specimens examined.

China. • Yunnan Prov.: Deqing Co., Baima Snow Mountain , 28°23'17"N, 99°01'10"E, alt. 4400 m, 01 Nov. 2015, L. S. Wang et al. 15-49590 ( KUN) ; • Deqing Co., Baima Snow Mountain , 28°23'17"N, 99°01'02"E, alt. 4519 m, 4 Jul. 2012, L. S. Wang et al. 12-34822 ( KUN) ; • Lijiang Ci., Yulong Naxi Autonomous Co., Yulong Snow Mountain , 27°01'56"N, 100°11'20"E, alt. 3737 m, 24 Oct. 2017, A. C. Yin 17-56207 ( KUN) ; • Lijiang Ci., Laojunshan Mountain , 26°38'30"N, 99°43'47"E, alt. 3855 m, 28 Sep. 2018, L. S. Wang et al. 18-60699 ( KUN) ; • Shangri-la Ci., on the way from Shangri-La to Daocheng , 28°26'00"N, 100°13'38"E, alt. 2951 m, 2 Jun. 2023, L. S. Wang et al. 23-74275 ( KUN) ; • Shangri-la Ci., on the way from Shangri-La to Daocheng , 28°26'00"N, 100°13'39"E, alt. 2981 m, 2 Jun. 2023, L. S. Wang et al. 23-74395 ( KUN) ; • Kunming Ci., Dongchuan District, Guniuzhai Mountain Scenic Spot , 26°10'01"N, 103°13'33"E, alt. 3190 m, 10 May. 2017, L. S. Wang et al. 17-55117 ( KUN) ; • Kunming Ci., Dongchuan District, Guniuzhai Mountain Scenic Spot , 26°09'50"N, 103°13'31"E, alt. 3100 m, 10 May. 2017, L. S. Wang et al. 17-55054 ( KUN) . • Xizang Prov.: Zuogong Co., on the way from Rumei to Zuogong, at the 3550 milestone on G 318 , 29°43'16"N, 98°01'34"E, alt. 4968 m, 21 Sep. 2016, L. S. Wang et al. 16-53097 ( KUN) ; • Dingri Co., Zhaguo Vil. , 28°35'25"N, 86°53'58"E, alt. 4298 m, 27 Jul. 2019, L. S. Wang et al. 19-65574 ( KUN) ; • Nielamu Co., Yalai Vil. , 28°21'52"N, 86°05'44"E, alt. 4402 m, 26 Jul. 2019, L. S. Wang et al. 19-64991 ( KUN) ; • Nielamu Co., 28°21'51"N, 86°05'42"E, alt. 4382 m, 26 Jul. 2019, L. S. Wang et al. 19-64053 ( KUN) ; • Cuoqin Co., S 206, 31°03'34"N, 85°02'11"E, alt. 4839 m, 20 Jul. 2019, L. S. Wang et al. 19-63666 ( KUN) ; • Pulan Co., La’angcuo Lake , 30°34'50"N, 81°15'25"E, alt. 4628 m, 24 Jul. 2019, L. S. Wang et al. 19-63913 ( KUN), L. S. Wang et al. 19-63921 ( KUN) ; • Dingjie Co., Chentang Town , 27°55'48"N, 87°37'57"E, alt. 4243 m, 28 Jul. 2019, L. S. Wang et al. 19-65758 ( KUN) .

Figures

Figure 8. Intraspecific morphological variation of Pleopsidium discurrens. A. 15-49590 (KUN), Yunnan; B. 17-56207 (KUN), Yunnan; C 17-55054 (KUN), Yunnan; D. 19-65758 (KUN), Xizang; E. 19-64991 (KUN), Xizang; F. 19-63913 (KUN), Xizang. Scale bars: 5 mm.